For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

196

High Speed Fuses

Ferrule fuses

Table of Contents

Basic Catalog

Amp

Number

Volts

Range

Page

FWA

150

5-60

197-198

FWX

250

1-50

199-200

FWH

500

0.25-30

201-204

FWC

600

6-32

205-206

FWP

690V/700

1-100

207-210

FWK

750

5-60

211-212

FWJ

1000

20-30

213-214

FWL/FWS

1250/1500/2000

2-30

215

Accessories

Fuse Holders

216

Ferrule Fuse Ranges

Volts

Amps

AC

DC

150

5-60

X

X

250

1-50

X

X

500

0.25-30

X

X

600

6-32

X

X

700 (22 x 58mm)

20-100

X

—

700 (14 x 51mm)

1-50

X

X

750

5-60

X

X

1000

20-30

X

X (800Vdc)

1250

20-30

X

X (1000Vdc)

1500

8-15

X

X (1000Vdc)

2000

2-6

X

X (1000Vdc)

General Information

Cooper Bussmann offers a full line of ferrule style (cylindrical
clip-mounted) fuses, designed and tested to meet standards
and requirements in various locations around the world.
Their unique design and construction provide:

• Superior cycling capability
• Low energy let-through (I

2

t)

Ferrule fuses provide an excellent solution for small UPS,
small ac drives and other low power applications where
space is at a premium.

Voltage Rating

All Cooper Bussmann ferrule fuses — except 690V — have
been tested at their rated voltage. The 690V ferrule fuse has
been tested to the IEC 60269 standard, which requires 
clearing at the rated voltage +5%.

Accessories

Ferrule fuses may be mounted in fuseclips, fuse holders,
fuse blocks or fused switches. A variety of products are 
available. Please consult Cooper Bussmann Application
Engineering to discuss your requirement.

Arc Voltage

This curve gives the peak
arc voltage, UL, which

may appear across the
fuse during its operation
as a function of the
applied working voltage,
Eg, (rms) at a power factor

of 15%.

Power Losses

Watts loss at rated current
is given in the electrical
characteristics. The curve
allows the calculation of
the power losses at load
currents lower than the
rated current. The 
correction factor, Kp, is

given as a function of the
RMS load current, Ib, in %

of the rated current.

Catalog Numbers

Electrical Characteristics

I

2

t (A

2

Sec)

Rated

Catalog

Current

Clearing

Watts

Numbers

Size

RMS-Amps

Pre-arc

at 150V

Loss

FWA-5A10F

5

1.6

8

1

FWA-10A10F

10

3.6

16

2.7

FWA-15A10F

10 x 38mm

15

14

55

3.3

FWA-20A10F

(

13

⁄

32

” x 1

1

⁄

2

”)

20

33

130

3.8

FWA-25A10F

25

58

220

4.9

FWA-30A10F

30

100

400

4.9

FWA-35A21F

35

75

800

4.5

FWA-40A21F

21 x 51mm

40

100

1000

5.1

FWA-45A21F

(

13

⁄

16

” x 2”)

45

130

1300

6

FWA-50A21F

50

170

1600

7.3

FWA-60A21F

60

250

2400

8.0

• Watts loss provided at rated current.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

Ferrule — FWA 150V: 5-60A

Dimensions - in (mm)

Amp

Dimensions

Range

A

B

C

5-30

1.5 (38.1)

0.375 (9.5)

0.406 (10.3)

35-60

2.0 (50.8)

0.625 (15.9)

0.811 (20.6)

U

L

E

g

200

100

100

150

50

300

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

A

B

C

FWA 5-30A (10 x 38mm)

35-60A (21 X 51mm)

Specifications
Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions 

illustration.

Ratings:

Volts: — 150Vac/dc

Amps: — 5-60A

IR: — 100kA Sym.

Agency Information:

CE, UL Recognition

Electrical Characteristics

Total Clearing I

2

t

The total clearing I

2

t at

rated voltage and at power
factor of 15% are given in
the electrical 
characteristics. For other
voltages, the clearing I

2

t is

found by multiplying by
correction factor, K, given
as a function of applied
working voltage, Eg, (rms).

150

102

70

22

1.5

1.0

0.5

0.3

0.2

0.15

Eg

K

1)

2)

1) 5-30A Range
2) 35-60A Range

Data Sheet: 720003

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

197

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

198

High Speed Fuses

Ferrule — FWA 150V: 5-60A

10

–4 

2 4 

6 

8 

10

1 

2 

2 4 

6 

8 

2 

10

2 

2 4 

6 

8 

10

3

2 

4 

6 

2 

6 
4 

10

0 

2 

6 
4 

10

1 

2 

6 
4 

2 

6 
4 

2 

6 
4 

6 
4 

2 

6 

2 

4 

10

–1 

10

–2 

10

–3 

10

2 

10

3 

10

4 

FWA-10A10F 

FWA-30A10F 

FWA-25A10F 

FWA-20A10F 

FWA-15A10F 

FWA-5A10F 

V

irtual Pre-Arcing 

T

ime In Seconds 

Prospective Current In Amps RMS

10

1

2

2

4

6

8

2

10

2

2

4

6

8

10

3

2

4

6

2

6
4

10

0

2

6
4

10

1

2

6
4

2

6
4

2

6
4

6
4

2

6

2

4

10

–1

10

–2

10

–3

10

–4

10

2

10

3

10

4

FWA-45A21F
FWA-50A21F
FWA-60A21F

FWA-35A21F
FWA-40A21F

V

irtual Pre-Arcing 

T

ime In Seconds

Prospective Current In Amps RMS

Prospective Short-Circuit Current Symmetrical RMS

Peak Let-Through Current

2

4

2

6

6

4

2

6

4

2

4

6

2

4

6

2

4

6

2

4

6

10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

FWA-20A10F

FWA-25A10F

FWA-30A10F

FWA-15A10F

FWA-12A10F

FWA-5A10F

FWA-10A10F

2

Prospective Short-Circuit Current Symmetrical RMS

Peak Let-Through Current

2

4

2

6

6

4

2

6

4

2

4

6

2

4

6

2

4

6

2

4

6

10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

FWA-35A21F

FWA-40A21F

FWA-45A21F

FWA-50A21F

FWA-60A21F

2

Peak Let-Through Curve

Peak Let-Through Curve

FWA 35-60A: 150V (21 x 51mm)

Time-Current Curve

FWA 5-30A: 150V (10 x 38mm)

Time-Current Curve

Data Sheet: 35785317

Data Sheet: 35785305

Ferrule — FWX 250V (UL): 1-50A

FWX (14 x 51mm)

Specifications
Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions

illustration.

Ratings:

Volts: — 250Vac/dc

Amps: — 1-50A

IR: — 200kA RMS Sym.

— 50kA @ 250Vdc

Agency Information:

CE, UL Recognition 1-50A & CSA

Component Acceptance: 5-30A

Electrical

Characteristics

Total Clearing I

2

t

The total clearing I

2

t at

rated voltage and at power
factor of 15% are given in
the electrical 
characteristics. For other
voltages, the clearing I

2

t is

found by multiplying by
correction factor, K, given
as a function of applied
working voltage, Eg, (rms).

Dimensions - mm (inches)

50.8

(2.000")

15.5

(0.610")

14.3

(0.563")

Arc Voltage

This curve gives the
peak arc voltage, UL,

which may appear
across the fuse during
its operation as a 
function of the applied
working voltage, Eg,

(rms) at a power factor
of 15%.

Power Losses

Watts loss at rated current
is given in the electrical
characteristics. The curve
allows the calculation of
the power losses at load
currents lower than the
rated current. The 
correction factor, Kp, is

given as a function of the
RMS load current, Ib, in %

of the rated current.

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Watts

Number

Size

RMS-Amps

Pre-arc

at 250V

Loss

FWX-1A14F

1

—

—

—

FWX-2A14F

2

—

—

—

FWX-3A14F

3

—

—

—

FWX-4A14F

4

—

—

—

FWX-5A14F

14 x 51mm

5

1.6

13

1.3

FWX-10A14F

(

9

⁄

16

” x 2”)

10

3.6

24

3.4

FWX-15A14F

15

14

83

3.8

FWX-20A14F

20

33

200

4.6

FWX-25A14F

25

58

300

5.3

FWX-30A14F

30

100

500

5.9

FWX-50A14F

50

200

1800

5.7

• Watts loss provided at rated current.
• (250Vdc/Interrupting rating 50kA) UL Recognition & CSA Component Acceptance on 5
through 30A only. Consult Cooper Bussmann for additional ratings.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

1.5

1.0

0.5

0.3

0.2

0.15

75

125

300

200

250

E

g

K

1)

2)

U

L

1.4
1.2

10

3

800

600

500

400

300

200

50

100

150

200

250

E

g

1)

2)

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

Data Sheet: 720006

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

199

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

200

High Speed Fuses

Ferrule — FWX 250V (UL): 1-50A

Prospective Current In Amps RMS

Prospective Current In Amps RMS

Peak Let-Through Curve

FWX 1-30A: 250V (14 x 51mm)

Time-Current Curve

Data Sheet: 35785302

Ferrule — FWH 500V: 0.25-30A

FWH (6 x 32mm)

Specifications
Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions

illustrations.

Ratings:

Volts: — 500Vac

Amps: — 0.25-30A

IR: — 50kA at ≥ 20% pf (0.25-20A)

— 20kA at ≥ 20% pf (25-30A)

Agency Information:

CE, UL Recognition 0.25-30A, CSA

Component Acceptance: 0.25-7A

Opening Times

Amp Ratings

150%

200%

300%

0.25-7

> 30 min

< 30 min

≤ 10 sec

10-30

< 30 min

< 30 min

≤ 10 sec

31.8

(1.25")

3.2

(0.125")

6.4

(0.25")

Dimensions - mm (inches)

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Watts

Numbers

Size

RMS-Amps

Pre-arc

at 500V

Loss

FWH-.250A6F

0.25*

0.01

0.05

2.7

FWH-.500A6F

0.5*

0.05

0.25

1.2

FWH-001A6F

1*

0.4

2

1.7

FWH-002A6F

2*

1.3

3.5

3.2

FWH-3.15A6F

3.15*

3.1

7.7

2.9

FWH-005A6F

5*

15

40

2.1

FWH-6.30A6F 6 x 32mm

6.3*

36

90

2.3

FWH-007A6F

(

1

⁄

4

” x 1

1

⁄

4

”)

7*

50

125

2.5

FWH-010A6F

10**

9.9

139

2.86 

FWH-12.5A6F

12.5**

20

60

3.53

FWH-015A6F

15**

44

146

3.08

FWH-016A6F

16**

48

177

4.48

FWH-020A6F

20**

75

259

4.26

FWH-025A6F

25**

126

345

—

FWH-030A6F

30**

145

430

—

*300% minimum opening current at rated voltage.
**200% minimum opening current at rated voltage.
• Consult Cooper Bussmann for DC ratings.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

Data Sheet: 720038

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

201

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

202

High Speed Fuses

Ferrule — FWH 500V: 0.25-30A

.2

.4

.6

.8

10

0

2

2

4

6

8

2

10

1

2

4

6

8

2

10

2

Prospective Current In Amps RMS

2

4

6

2

6

4

2

6

4

2

6

4

2

6

4

2

6

4

10

–1

10

–2

4x10

–3

10

0

10

1

10

2

10

3

10

4

V

irtual Pre-Arcing 

T

ime In Seconds

FWH-002A6F

FWH-3.15A6F

FWH-005A6F

FWH-6.30A6F

FWH-001A6F

FWH-.500A6F

FWH-.250A6F

FWH-007A6F

FWH 0.25-7A: 500V (6 x 32mm)

Time-Current Curve

FWH 10-30A: 500V (6 x 32mm)

Time-Current Curve

Data Sheet: 35785256

Data Sheet: 50955

Ferrule — FWH 500V: 1-30A

Dimensions - mm (inches)

50.8

(2.000")

15.5

(0.610")

14.3

(0.563")

FWH (14 x 51mm)

Specifications
Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions

illustration.

Ratings:

Volts: — 500Vac/dc

Amps: — 1-30A

IR: — 200kA RMS Sym.

— 50kA @500Vdc

Agency Information:

CE, UL Recognition 1- 30A & CSA

Component Acceptance: 5 - 30A. 

Electrical Characteristics

Total Clearing I

2

t

The total clearing I

2

t at rated

voltage and at power factor
of 15% are given in the elec-
trical characteristics. For
other voltages, the clearing
I

2

t is found by multiplying by

correction factor, K, given as
a function of applied working
voltage, Eg, (rms).

500

400

250

100

1.5

1.0

0.5

0.3

0.2

0.15

E

g

K

Arc Voltage

This curve gives the peak
arc voltage, UL, which may

appear across the fuse 
during its operation as a
function of the applied 
working voltage, Eg, (rms)

at a power factor of 15%.

Power Losses

Watts loss at rated current
is given in the electrical
characteristics. The curve
allows the calculation of the
power losses at load 
currents lower than the
rated current. The correction
factor, Kp, is given as a

function of the RMS load
current, Ib, in % of the rated

current.

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Watts

Numbers

Size

RMS-Amps

Pre-arc

at 500V

Loss

FWH-1A14F

1

—

—

—

FWH-2A14F

2

—

—

—

FWH-3A14F

3

—

—

2.3

FWH-4A14F

4

—

—

—

FWH-5A14F

5

1.6

6.4

1.5

FWH-6A14F

14 x 51mm

6

1.6

6.4

1.5

FWH-10A14F

(

9

⁄

16

” x 2”)

10

3.6

13

4

FWH-12A14F

12

—

—

—

FWH-15A14F

15

10

40

5.5

FWH-20A14F

20

26

96

6

FWH-25A14F

25

49

191

7

FWH-30A14F

30

58

232

9

• Watts loss provided at rated current.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

U

L

2.0

1.6

1.2

10

3

800

600

500

400

300

100

400

300

200

500

E

g

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

Data Sheet: 720008

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

203

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

204

High Speed Fuses

Ferrule — FWH 500V: 1-30A

Peak Let-Through Curve

2

4

6

8

10

1

2

2

4

6

8

2

10

2

2

4

6

8

10

3

2

4

6

2

6
4

2

6
4

2

6
4

2

6
4

2

6
4

6
4

2

6

2

4

FWH-5A14F
FWH-10A14F
FWH-15A14F
FWH-20A14F
FWH-25A14F
FWH-30A14F

V

irtual Pre-Arcing 

T

ime In Seconds

Prospective Current In Amps RMS

10

3

10

0

10

1

10

4

10

2

10

–4

10

–3

10

–2

10

–1

FWH 1-30A: 500V (14 x 51mm)

Time-Current Curve

Prospective Short-Circuit Current Symmetrical RMS

Peak Let-Through Current

2

4

2

6

6

4

2

6

4

2

4

6

2

4

6

2

4

6

2

4

6

10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

FWH-5A14F

FWH-10A14F

FWH-15A14F

FWH-20A14F

FWH-25A14F

FWH-30A14F

2

Data Sheet: 35785298

Ferrule — FWC 600V: 6-32A

Dimensions - mm (inches)

38.1

(1.500")

9.5

(0.375")

10.3

(0.406")

FWC (10 x 38mm)

Specifications
Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions

illustration.

Ratings:

Volts: — 600Vac/dc

Amps: — 6-32A

IR: — 200kA RMS Sym.

— 50kA @ 700Vdc (6-25A)

Agency Information:

CE, UL Recognition: 6-32A. 

UL Recognition: 6-25A

Electrical Characteristics

Total Clearing I

2

t

The total clearing I

2

t at rated

voltage and at power factor
of 15% are given in the 
electrical characteristics. For
other voltages, the clearing
I

2

t is found by multiplying by

correction factor, K, given as
a function of applied working
voltage, Eg, (rms).

Arc Voltage

This curve gives the peak
arc voltage, UL, which

may appear across the
fuse during its operation
as a function of the
applied working voltage,
Eg, (rms) at a power 

factor of 15%.

Power Losses

Watts loss at rated 
current is given in the
electrical characteristics.
The curve allows the 
calculation of the power
losses at load currents
lower than the rated 
current. The correction
factor, Kp, is given as a

function of the RMS load
current, Ib, in % of the

rated current.

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Watts

Numbers

Size

RMS-Amps

Pre-arc

at 600V

Loss

FWC-6A10F

6

4

30

1.5

FWC-8A10F

8

6

50

2.0

FWC-10A10F

10

9

70

2.5

FWC-12A10F

10 x 38mm

12

15

120

3.0

FWC-16A10F

(

13

⁄

32

” x 1

1

⁄

2

”)

16

25

150

3.5

FWC-20A10F

20

34

260

4.8

FWC-25A10F

25

60

390

6.0

FWC-30A10F

30

95

600

7.5

FWC-32A10F

32

95

600

7.5

• Watts loss provided at rated current.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

500

600

400

250

100

1.5

1.0

0.5

0.3

0.2

0.15

E

g

K

U

L

2.0

1.6

1.2

10

3

800

600

500

400

300

400

300

200

500      600

E

g

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

Data Sheet: 720011

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

205

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

206

High Speed Fuses

Ferrule — FWC 600V: 6-32A

10

3

10

4

10

2

10

–1

10

–2

10

–3

10

–4

10

1

2

2

4

6

8

2

10

2

2

4

6

8 10

3

2

4

6

2

6
4

10

0

2

6
4

10

1

2

6
4

2

6
4

2

6
4

6
4

2

6

2

4

Prospective Current In Amps RMS

V

irtual Pre-Arcing 

T

ime In Seconds

FWC-10A10F

FWC-30A10F & FWC-32A10F

FWC-20A10F
FWC-25A10F

FWC-12A10F
FWC-16A10F

 FWC-8A10F

 FWC-6A10F

Prospective Short-Circuit Current Symmetrical RMS

Peak Let-Through Current

2

4

2

6

6

4

2

6

4

2

4

6

2

4

6

2

4

6

2

4

6

10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

FWC-6A10F

FWC-8A10F

FWC-10A10F

FWC-12A10F

FWC-16A10F

FWC-20A10F

FWC-25A10F

FWC-30A10F & FWC-32A10F

Peak Let-Through Curve

FWC 6-32A: 600V (10 x 38mm)

Time-Current Curve

Data Sheet: 35785306

Ferrule — FWP 690V/700V (IEC/UL): 1-50A,
Striker Optional

Dimensions - mm (inches)

51 (2.00")

59 (2.323")

13 (0.511")

14.3

(0.563")

5 (0.197")

FWP (14 x 51mm)

Specifications
Description:

Ferrule style high

speed fuses with and without 
indicating striker.

Dimensions:

See dimensions

illustrations.

Ratings:

Volts: — 690Vac (IEC)

— 700Vac (UL)

— 800Vdc (5-50A)

Amps: — 1-50A

IR: — 200kA RMS Sym.

— 50kA @800Vdc

Agency Information:

CE, UL Recognition, CSA

Component Acceptance for versions without indicator only.

Electrical Characteristics

Total Clearing I

2

t

The total clearing I

2

t at

rated voltage and at power
factor of 15% are given in
the electrical 
characteristics. For other
voltages, the clearing I

2

t is

found by multiplying by
correction factor, K, given
as a function of applied
working voltage, Eg, (rms).

Arc Voltage

This curve gives the peak
arc voltage, UL, which

may appear across the
fuse during its operation
as a function of the
applied working voltage,
Eg, (rms) at a power factor

of 15%.

Power Losses

Watts loss at rated current
is given in the electrical
characteristics. The curve
allows the calculation of
the power losses at load
currents lower than the
rated current. The 
correction factor, Kp, is

given as a function of the
RMS load current, Ib, in %

of the rated current.

Catalog Numbers

Rated

I

2

t (A

2

Sec)

Catalog

Current

Minimum

Clearing At

Watts

Numbers

Size

RMS-Amps

Melting

Rated Voltage

Loss

Without Striker
FWP-1A14Fa

1

—

—        

—

FWP-2A14Fa

2

—

—

—

FWP-2.5A14Fa

2.5

—

—

—

FWP-3A14Fa

3

—

—

—

FWP-4A14Fa

4

—

—

—

FWP-5A14Fa

14 x 51mm

5

1.6

11.0

1.5

FWP-10A14Fa

(

9

⁄

16

" x 2")

10

3.6

38.5

4

FWP-15A14Fa

15

8.6

70

5.5

FWP-20A14Fa

20

26.0

230

6

FWP-25A14Fa

25

46.5

375

7

FWP-30A14Fa

30

58

485

9

FWP-32A14Fa

32

68

600

7.6

FWP-40A14Fa

40

84

750

8

FWP-50A14Fa

50

200

1800

9

With Striker
FWP-10A14FI

10

3.6

38.5

4

FWP-15A14FI

15

8.6

70

5.5

FWP-20A14FI

14 x 51mm

20

26.0

230

6

FWP-25A14FI

(

9

⁄

16

” x 2”)

25

46.5

375

7

FWP-30A14FI

30

58

485

9

FWP-32A14FI

32

68

600

7.6

FWP-40A14FI

40

84

750

8

FWP-50A14FI

50

200

1800

9

• Watts loss provided at rated current.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (

I2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

U

L

1.4

1.2

10

3

6

8
7

9

5

4

3

200

300

400

500

600

700

E

g

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

K

1.4

1.2

1.0

0.6

0.8
0.7

0.9

0.5

0.4

0.3

200

300

400

500

600

700

E

g

1)

2)

1) 5-30A Range
2) 32-50A Range

50.8

(2.000")

15.5

(0.610")

14.3

(0.563")

With Striker

Without Striker

FWP with

striker option.

Electrical Characteristics

Data Sheet: 720025

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

207

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

208

High Speed Fuses

Ferrule — FWP 690V/700V (IEC/UL): 1-50A,
Striker Optional

10

3

10

2

10

–1

10

–2

10

–3

10

–4

FWP-10A14F
FWP-15A14F
FWP-20A14F

FWP-5A14F

FWP-50A14F

FWP-30A14F
FWP-32A14F
FWP-40A14F

FWP-25A14F

2

4

6

8

10

1

2

2

4

6

8

2

10

2

2

4

6

8

10

3

2

4

6

2

6
4

10

0

2

6
4

10

1

2

6
4

2

6
4

2

6
4

6
4

2

6

2

4

Prospective Current In Amps RMS

V

irtual Pre-Arcing 

T

ime In Seconds

10

4

Prospective Short-Circuit Current Symmetrical RMS

Peak Let-Through Current

2

4

2

6

6

4

2

6

4

2

4

6

2

4

6

2

4

6

2

4

6

10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

FWP-5A14F

FWP-10A14F

FWP-15A14F

FWP-20A14F

FWP-25A14F

FWP-30A14F

FWP-32A14F

FWP-40A14F

FWP-50A14F

2

Peak Let-Through Curve

Without Striker
FWP 5-50A: 660V/700V (14x 51mm)

Time-Current Curve

Data Sheet: 35785307

Ferrule — FWP 690V/700V (IEC/UL):
20-100A, Striker Optional

Dimensions - mm (inches)

66 (2.598")

58 (2.283")

16 (0.630"

22.2 (0.874")

5

(0.197")

FWP (22 x 58mm)

Specifications
Description:

Ferrule style high

speed fuses with and without
indicating striker.

Dimensions:

See dimensions

illustration.

Ratings:

Volts: — 690Vac (IEC)

— 700Vac (UL)

Amps: — 20-100A

IR: — 200kA RMS Sym.

— 50kA @ 500Vdc

Agency Information:

CE, UL Recognition

Electrical Characteristics

Total Clearing I

2

t

The total clearing I

2

t at

rated voltage and at power
factor of 15% are given in
the electrical 
characteristics. For other
voltages, the clearing I

2

t is

found by multiplying by
correction factor, K, given
as a function of applied
working voltage, Eg, (rms).

Arc Voltage

This curve gives the peak
arc voltage, UL, which

may appear across the
fuse during its operation
as a function of the
applied working voltage,
Eg, (rms) at a power factor

of 15%.

Power Losses

Watts loss at rated current
is given in the electrical
characteristics. The curve
allows the calculation of
the power losses at load
currents lower than the
rated current. The 
correction factor, Kp, is

given as a function of the
RMS load current, Ib, in %

of the rated current.

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Minimum

Clearing At

Watts

Numbers

Size

RMS-Amps

Melting

Rated Voltage

Loss

Without Striker
FWP-20A22Fa

20

19.0

260

5

FWP-25A22Fa

25

34.0

410

6

FWP-32A22Fa

22 x 58mm

32

53.5

605

8

FWP-40A22Fa

(

7

⁄

8

" x 2

9

⁄

32

")

40

68

750

9

FWP-50A22Fa

50

135

1600

9.5

FWP-63A22Fa

63

280

3080

11

FWP-80A22Fa

80

600

6600

13.5

FWP-100A22Fa

100*

1100

12500

16

With Striker
FWP-20A22FI

20

19.0

260

5

FWP-25A22FI

25

34.0

410

6

FWP-32A22FI

22 x 58mm

32

53.5

605

8

FWP-40A22FI

(

7

⁄

8

" x 2

9

⁄

32

")

40

68

750

9

FWP-50A22FI

50

135

1600

9.5

FWP-63A22FI

63

280

3080

11

FWP-80A22FI

80

600

6600

13.5

FWP-100A22FI

100*

1100

12500

16

*IEC/UL Voltage rating 690/700

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

K

1.4

1.2

1.0

0.6

0.8
0.7

0.9

0.5

0.4

0.3

200

300

400

500

600

700

E

g

U

L

1.4

1.2

10

3

6

8
7

9

5

4

3

200

300

400

500

600

700

E

g

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

Data Sheet: 720026

58.0

(2.283")

15.0

(0.591")

22.2

(0.875")

With Striker

Without  Striker

FWP with

striker

option.

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

209

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

210

High Speed Fuses

Ferrule — FWP 690V/700V (IEC/UL): 20-100A,
Striker Optional

10

1

2

2

4

6

8

2

10

2

2

4

6

8

10

3

2

4

6

2

6
4

2

6
4

2

6
4

2

6
4

2

6
4

6
4

2

6

2

4

10

1

10

0

10

–1

10

–2

10

–3 

10

–4

10

2

10

3

10

4

Prospective Current In Amps RMS

V

irtual Pre-Arcing 

T

ime In Seconds

FWP-20A22F
FWP-25A22F
FWP-32A22F
FWP-40A22F

FWP-50A22F
FWP-63A22F
FWP-80A22F
FWP-100A22F

10

4

Prospective Short-Circuit Current Symmetrical RMS

P

eak Let-Through Current

2

6

4

2

6

4

2

4

6

2

4

6

2

4

6

10

2

10

3

10

2

10

3

10

4

10

5

FWP-20A22F

FWP-25A22F

FWP-32A22F

FWP-40A22F

FWP-50A22F

FWP-63A22F

FWP-80A22F

FWP-100A22F

2

Peak Let-Through Curve

Without Striker
FWP  20-100A: 660V/700V (22 x 58mm)

Time-Current Curve

Data Sheet: 35785291

Ferrule — FWK 750V: 5-60A

Dimensions - mm (inches)

Fig. 1: 5-30A

146.05

(5.75")

25.4

(1")

20.64

(0.813")

Fig. 2: 35-60A

127.0

(5.000")

16.0

(0.630")

20.5

(0.807")

FWK 5-30A (20 x 127mm

35-60A (25 x 146mm)

Specifications
Description:

Ferrule style high speed fuses.

Dimensions:

See Dimensions illustrations.

Ratings:

Volts: — 750Vac

— 750Vdc (Time constant = 10-15mS)

Amps: — 5-60A

IR: — 45kA RMS Sym.

Agency Information:

CE

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Numbers

Size

RMS-Amps

Pre-arc

at 750Vdc

FWK-5A20F

5

8.5

16

FWK-8A20F

8

50

100

FWK-10A20F

10

95

200

FWK-15A20F

20 x 127mm

15

100

240

FWK-20A20F

(

13

⁄

16

” x 5”)

20

125

315

FWK-25A20F

25

400

1100

FWK-30A20F

30

800

2600

FWK-35A25F

35

1300

4300

FWK-40A25F

25 x 146mm

40

1600

5300

FWK-50A25F

(1” x 5

3

⁄

4

”)

50

3100

12000

FWK-60A25F

60

5900

24000

Recommended fuseholders for 20x127, CH127-1, -2, -3
Recommended fuseclips for 20x127, 1A1837
Recommended fuseclips for 25x146, A3354705

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

Data Sheet: 720039

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

211

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

212

High Speed Fuses

Ferrule — FWK 750V: 5-60A

2

4

6

8

10

1

2

2

4

6

8

2

10

2

2

4

6

8

10

3

2

4

6

2

6

4

2

6

4

2

6

4

2

6

4

2

6

4

10

±

1

10

±

2

4x10

±

3

10

0

10

1

10

2

10

3

10

4

FWK-15A20F

FWK-20A20F

FWK-25A20F

FWK-30A20F

FWK-40A25F

FWK-50A25F

FWK-60A25F

 FWK-5A20F

 FWK-8A20F

FWK-10A20F

Prospective Current In Amps RMS

V

irtual Pre-Arcing 

T

ime In Seconds

FWK 750V: 5-30A (20 x 127mm)

35-60A (25 x 146mm)

Time-Current Curve

Data Sheet: 35785031

Ferrule — FWJ 1000V: 20-30A

Dimensions - mm (inches)

66.7

(2.626")

15.9

(0.625")

14.5

(0.571")

FWJ (14 x 67mm)

Specifications
Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions

illustration.

Ratings:

Volts: — 1000Vac/800Vdc

Amps: — 20-30A

IR: — 25kA RMS Sym.

— 20kA @ 800Vdc

Agency Information:

CE, UL Recognized

Electrical Characteristics

Total Clearing I

2

t

The total clearing I

2

t at

rated voltage and at power
factor of 15% are given in
the electrical 
characteristics. For other
voltages, the clearing I

2

t is

found by multiplying by
correction factor, K, given
as a function of applied
working voltage, Eg, (rms).

Arc Voltage

This curve gives the peak
arc voltage, UL, which

may appear across the
fuse during its operation
as a function of the
applied working voltage,
Eg, (rms) at a power factor

of 15%.

Power Losses

Watts loss at rated current
is given in the electrical
characteristics. The curve
allows the calculation of
the power losses at load
currents lower than the
rated current. The 
correction factor, Kp, is
given as a function of the
RMS load current, Ib, in %

of the rated current.

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Watts

Numbers

Size

RMS-Amps

Pre-arc

at 1000V

Loss

FWJ-20A14F

14 x 67mm

20

25

220

9

FWJ-25A14F

(

9

⁄

16

” x 2

5

⁄

8

”)

25

33

350

11

FWJ-30A14F

30

52

450

14

• Watts loss provided at rated current.
• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

1000

800

500

200

1.5

1.0

0.5

0.3

0.2

0.15

Eg

K

2000

1600

1200

800

400

200

600

1000 1400 1800

U

L

E

g

K

p

1.0
0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

Data Sheet: 720028

Fuseclips:

• Catalog Number: 5591 (see data sheet 2132)

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

213

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

214

High Speed Fuses

Ferrule — FWJ 1000V: 20-30A

FWJ-20A14F
FWJ-25A14F
FWJ-30A14F

10

1

2

2

4

6

8

2

10

2

2

4

6

8 10

3

2

4

6

2

6
4

2

6
4

2

6
4

2

6
4

2

6
4

6
4

2

6

2

4

10

–4

10

0

10

1

10

–1

10

–2

10

–3

10

2

10

3

10

4

Prospective Current In Amps RMS

V

irtual Pre-Arcing 

T

ime In Seconds

FWJ 20-30A: 1000V (14 x 67mm)

Time-Current Curve

Prospective Short-Circuit Current Symmetrical RMS

P

eak Let-Through Current

2

4

2

6

6

4

2

6

4

2

4

6

2

4

6

2

4

6

2

4

6

10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

FWJ-20A14F

FWJ-25A14F

FWJ-30A14F

2

Peak Let-Through Curve

Data Sheet: 35785315

Ferrule — FWS/FWL 1000Vdc: 2-30A

Dimensions - mm (inches)

127.0

(5.000")

16.0

(0.630")

20.5

(0.807")

Indicating Version – Dimensions - mm (inches)

127.0

(5.000")

16.0

(0.630")

20.5

(0.807")

2.0

(0.079")

2.0

8.0

(0.315")

FWL/FWS 2-30A: 1000Vdc 2-30A 
(20 x 127mm)

Time-Current Curve

FWS 2-15A (20 x 127mm)
FWL 20-30A (20 x 127mm)

Specifications
Description:

Ferrule style full range

fuses.

Dimensions:

See dimensions 

illustrations.

Ratings:

Volts: — 1200Vac (FWL 20-30A)

— 1400Vac (FWS 8-15A)

— 2100Vac (FWS 2-6A)

— 1000Vdc (FWL/FWS 2-30)

Amps: — 2-30A

IR: — 45kA RMS Sym.

— 30kA @ 1000Vdc

Agency Information:

CE, IEC 60077

Catalog Numbers

Electrical Characteristics

Rated

I

2

t (A

2

Sec)

Catalog

Current

Clearing

Watts

Numbers

Size

RMS-Amps

Pre-arc

at 1000Vdc

Loss

FWS-2A20F

2

0.8

2.4

4.4

FWS-6A20F

6

27

81

6.7

FWS-8A20F

20 x 127mm

8

64

192

7.6

FWS-10A20F

(

13

⁄

16

” x 5”)

10

118

277

3.0

FWS-12A20F

12

170

380

3.4

FWS-15A20F

15

209

500

5.0

FWL-20A20F

20 x 127mm

20

675

1550

5.9

FWL-25A20F

(

13

⁄

16

” x 5”)

25

1200

2760

6.5

FWL-30A20F

30

1850

4300

7.5

• ADD “I” to catalog number for indicating version.
• Enclosed finger-safe fuse holder – CH127
• Open style fuse block – 4530-OP
• See accessories on page 216.
• Watts loss provided at rated current.

Features and Benefits

• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I

2

t)

• Low watts loss in a compact size
• Used with finger-safe holders/blocks

Typical Applications

• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
• Traction aux circuits
• Capacitor protection

Data Sheet: 720040

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

215

High Speed

Fuses

High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

216

High Speed Fuses

Ferrule Fuse Accessories

Data Sheet: 2053

Fuse Holders

Specifications
Catalog Symbol:

CH Series

Description:

DIN rail mount

fuse holders

Agency Information:

cULus/cURus/CE

North American 10 x 38
Class CC:

Listed UL 4248,

Guide IZLT, File E14853,
Certified CSA Std. C22.2 No.
39, Class 6225 01, File 47235

North American 10 x 38 Midget:

Recognized UL 4248,

Guide IZLT2, File E14853, Certified CSA Std. C22.2 No. 39,
Class 6225 01, File 47235

European:

10 x 38 IEC 269-2-1, 14 x 51 IEC 269-2-1, 

22 x 58 IEC 269-2-1

Features and Benefits

• Finger-safe design - No exposed contacts
• DIN rail mount (35mm) - Fits standard mounting rails
• Optional open fuse indication lights tells fuse status at a

glance

• Handle/fusepuller easily installs and removes fuses
• Available in single and multi-pole configurations
• Wire ready lugs and spade terminal connections save 

installation time

• CE marking
• Available up to 1000Vdc
• PLC device available for remote monitoring

Typical Applications

• Switchboard panel, control consoles, small motors, 

transformers, and similar applications

Recommended Cooper Bussmann Fuse Types

Class CC North American Class CC Fuses - LP-CC, 

FNQ-R, KTK-R

10 x 38

North American Midget Fuses - FNQ, KTK, AGU,

BAF, BAN, FNM, FWA, FWC, PV & DCM

14 x 51

Fuses - FWX, FWH, FWP & NON

22 x 58

Fuses - FWP

See pages 257 and 258 for CH Series fuse holder information.

Fuse Blocks

Specifications
Catalog Symbol:

J70100,
J70032

Description:

Fuse blocks 

for 22 x 58mm & 14 x 51mm
fuses. 

Ratings:

Volts: — 700Vac

Amps: — 32-100A

Withstand: — 200kA RMS Sym.

Agency Information:

CE, UL Recognized, Guide IZLT2,

File E14853

Flammability Rating:

UL 94V0

Catalog Numbers

Catalog

Fuse

Max Wire

Numbers

Size

Amps

Poles

Size

Terminations

J70032-2CR

32

2

#2

Box Lug w/

J70032-3CR

32

3

#2

Retaining Clip

J70100-1CR

100

1

#2

J70100-2CR

22x58

100

2

#2

J70100-3CR

100

3

#2

Data Sheet: 1211

Box Lug w/

Retaining Clip

14x51