WIRE WOUND RESISTORS

SILICONE COATED TYPE

TM

Alloy Resistance Wire, wound

On Fibre Glass Core

Flame Retardant

Silicone Coating

Mechanically Crimped,

Tin Plated,

PCB Type Termination

HFP

S E R I E S

Silicone Coated Wire Wound Resistors

Plug In Style

FIBRE GLASS SUBSTRATE

Choice of terminals which are suitable
for wave soldering.

APPLICABLE

 

STANDARDS

PHYSICAL CONFIGURATION

If the longer stand-off terminal is 
required, suffix the type with '0'. 
e.g. F-2 P-0 to F-8 P-0.

If the shorter stand-off terminal is 
required, suffix the type with '1' 
e.g. F-2 P-1 to F-8 P-1.

The resistance range given is 
applicable to the standard HFP 
series resistors. 

Pulse type 

resistors available. 

Please 

consult factory.

IS 8909 and - IEC - Pub 266

L

P

CHOICE OF TERMINALS

+

8 0.5

4+0.2

D

1.6(max.)

1.1+0.1

D

17+0.5

3(max.)

1.1+0.1

0

1

4.3+0.2

F-2P 2.5W

18.2 5.0 10.2

R10

10K

1.38

1.05

F-4P

4W

23.3 5.0 15.2

R10

15K

1.70

1.25

F-5P

5W

33.4 5.0 25.4

R10

27K

2.10

1.90

F-7P 6.5W

43.5 5.0 35.4

R10

39K

2.80

2.50

F-8P

8W

53.7 5.0 45.7

R10

56K

3.10

2.91

HTR

TYPE

POWER
RATING

at 70°C

DIMENSIONS (mm) RESISTANCE

RANGE 

min      max

L

+2/-1

P

+1.0

TYPICAL

WT. PER PC '0’

TERMINAL

(gms)

TYPICAL

WT. PER PC '1'

TERMINAL

(gms)

D

+1

WIRE WOUND RESISTORS

SILICONE COATED TYPE

H

F

P

PHYSICAL CONFIGURATION

L

P

TM

If the “C” type stand-off terminal is required, suffix the type with “C”. e.g. F-4P-C to F-8P-C

If the “CA” type stand-off terminal is required, suffix the type with “CA”. e.g. F-4P-CA to F-8P-CA

If the “CZ” type stand-off terminal is required, suffix the type with “CZ”. e.g. F-4P-CZ to F-8P-CZ

CHOICE OF TERMINALS

F-4P

4W

23.3 5.0 15.2

R10

15K

1.8

2.2

1.8

F-5P

5W

33.4 5.0 25.4

R10

27K

2.2

2.4

2.2

F-7P 6.5W

43.5 5.0 35.4

R10

39K

2.9

3.0

2.8

F-8P

8W

53.7 5.0 45.7

R10

56K

3.15

3.2

3.15

HTR

TYPE

POWER
RATING

at 70°C

DIMENSIONS (mm) RESISTANCE

RANGE 

min      max

L

+2/-1

P

+1.0

TYPICAL WT. PER PC

(gms)

‘C’

terminal

'CA’

terminal

'CZ’

terminal

D

+1

D

4.5 [max]

1.5 (+0.2)

4.5 (+0.5)

30.0 (+2.0)

D

4.5 (+0.5)

18.5 (+2.0)

1.4 (+0.2)

3.0 [max]

D

27.0 (+2.0)

4.5 (+0.5)

1.5 (+0.2)

3.5 (+0.2)

1.1 (+0.2)

*Max. displacement of

alignment 4.5mm

CZ

CA

C

WIRE WOUND RESISTORS

SILICONE COATED TYPE

H

F

P

1

2

(1) Body Temperature Measuring Point.
(2) Solder Joint Measuring Point.

The HFP series was evolved in order to provide a low cost but reliable alternative to those OEM's who have 
automated assembly facilities including wave soldering. Due to their design, these resistors have merely to be 
plugged into the PCB and wave soldered.

These fibre glass substrate resistors are shatterproof owing to their construction and are coated with a special 
silicone cement which cannot drip even at high overloads.

TYPICAL APPLICATIONS

F2P

230°C

180°C

50°C

70°C

F4P

285°C

235°C

83°C

98°C

55°C

52°C

49°C

F5P

285°C

240°C

50°C

85°C

57°C

57°C

58°C

F7P

292°C

260°C

45°C

85°C

62°C

55°C

55°C

F8P

290°C

246°C

55°C

80°C

57°C

55°C

55°C

Temperature At Full Power Dissipation

TYPE

Low

Resistance 

Range

High 

Resistance 

Range

'0’ Type

Terminal

Measuring Point 1

Measuring Point 2

'1’ Type

Terminal

‘C’ Type

Terminal

‘CA’ Type

Terminal

‘CZ’ Type

Terminal

TM

ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA

Performance Requirements 

Test

Resistance tolerance

+ 10% [K]; + 5% [J]
[< 1R0 + R05]

Rated ambient temperature at 70°C full power dissipation
[ see derating curve]

linearly derated to zero at 275° C

Temperature co-efficient

+ 100 ppm/ °C [> 10R]
+ 100 ppm/ °C [< 10R]
+ 450 ppm/ °C [< 1R0]

Short time overload

Max 

D

R+[ 2%+R05]

Moisture resistance

Max 

D

R+ [5%+R05]

Load life

Max 

D

R+ [5%+R05]

Ambient operating
temperature range.

-40°C to +155°C

TEMPERATURE RISE

40         

80        

120       

160        

200       

240    

275

Ambient temperature [°C]

70°C

DERATING CURVE

R

a

te

d

 d

is

si

p

a

ti

o

n

 [

%

] 120

100

80

40

0

WIRE WOUND RESISTORS

SILICONE COATED TYPE

H

F

P

Note :

In this series there is a choice of terminal standoff heights available; please refer
"PHYSICAL CONFIGURATION" for selection.

The Words - “Applicable Standards” do not necessarily signify certification to that standard, however the tests 

mentioned are carried out on the broad based guidelines set out in these standards.

TYPE OF TERMINATION

TOLERANCE

RESISTANCE VALUE

HTR TYPE

SERIES

HFP

F8P

250R

J

O / 1 / C / CA / CZ

ORDERING INFORMATION

TM