~ To be your valuable partner in the component industry through 

constant product innovation and customer satisfaction ~

~ Firstohm, where OHM comes FIRST ~

Certificate No. FM 577844

Certificate No. EMS 594693

Product Reference Table

Type

C3

C3M

CM

CSM

CSR

EFP

EFR

ESM

FGE FGE26C FM

HFT

HVM HVR

HVR

IG

ISC

ISW

M-

Series MM

MM

(P)

MMP

Product Name

Composite Film-type Ceramic Composition 

Resistor

Composite Film-T

ype Ceramic Composition 

MELF Resistor

Carbon Film MELF Resistor

Current Sense MELF Resistor

Current Sense Resistor

Enhanced Film Power MELF Resistor

Enhanced Film Fixed Resistor

ESD Sur

ge 

Absorber MELF

Fusible Resistor

Fusible Resistor Constant Current

Fusible MELF Resistor

High Frequency 

T

erminator Resistor

High 

V

oltage MELF Resistor

High 

V

oltage 

Resistor

High 

V

oltage Resistor (High Power)

Ignition Fixed Resistor

Ignition Noise Suppression Resistor (Film/

Ceramic 

Composite 

T

ype)

Ignition Noise Suppression Resistor 

(W

irewound 

T

ype)

Metal Film Fixed Resistor

Metal Film MELF Resistor

Metal Film MELF Resistor 

(Pulse 

W

ithstanding)

 Film MELF Precision Resistor

Cir

cuit 

T

ypes

Charge/Discharge/ 

Anti-Surge

●

●

●

●

●

●

●

●

Current Sense

●

●

High Frequency

●

High Precision

●

High Stability

●

●

●

High Voltage

●

●

●

●

Ignition / Lighting

●

●

●

●

●

Power Circuit

●

●

Safety / Protection

●

●

●

●

●

●

Jumper

Firstohm

Product Reference Table

MMP

(V)

MO

MP

MSD MVM MVR

NFR NWA PMA

PPR

PSR

PWR

R-

Series SCP

SFP

SFP

(V)

SGS

SLC

SM

SRM

SSR

SWA SWM

WA

ZMM ZOM

Metal Film MELF Precision Resistor(V

ehicle 

Grade)

Metal Oxide Film Fixed Resistor

Metal Film Precision Resistor

Pulse Safety Resistor

Medium 

V

oltage MELF Resistor

Medium 

V

oltage 

Resistor

Non Flammable Carbon Film Resistor

Non-inductive 

W

ire 

W

ound Resistor

Professional Metal Film 

Axial Resistor

Pulse Protective Resistor

Power Sink Resistor

Power Metal Film Resistor

Carbon Film Power Resistor

Short Circuit Protection Resistor

Stabilized Film Power MELF Resistor

 St

abil

ized Film Power MELF Resi

stor(V

ehicle

 

Grade)

Spark-Gap Sur

ge 

Absorber

Slug Resistor Center Coated

Stabilized Metal Film MELF Resistor

Sur

ge Resistant MELF Resistor

Sur

ge Safety Resistor

Anti-Sur

ge 

W

irewound 

Resistor

Anti-Sur

ge 

W

irewound MELF Resistor

W

irewound Resistors

Zero Ohm Metal Film MELF Resistor

Zero Ohm Metal Film Resistor

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●

Firstohm

Product Reference Table

Type

C3

C3M

CM

CSM

CSR

EFP

EFR

ESM

FGE FGE26C FM

HFT

HVM HVR

HVR

IG

ISC

ISW

M-

Series MM

MM

(P)

MMP

Product Name

Composite Film-type Ceramic Composition Resistor

Composite Film-T

ype Ceramic Composition MELF 

Resistor

Carbon Film MELF Resistor

Current Sense MELF Resistor

Current Sense Resistor

Enhanced Film Power MELF Resistor

Enhanced Film Fixed Resistor

ESD Sur

ge 

Absorber MELF

Fusible Resistor

Fusible Resistor Constant Current

Fusible MELF Resistor

High Frequency 

T

erminator Resistor

High 

V

oltage MELF Resistor

High 

V

oltage 

Resistor

High 

V

oltage Resistor (High Power)

Ignition Fixed Resistor

Ignition Noise Suppression Resistor (Film/Ceramic 

Composite 

T

ype)

Ignition Noise Suppression Resistor (W

irewound 

T

ype)

Metal Film Fixed Resistor

Metal Film MELF Resistor

Metal Film MELF Resistor 

(Pulse 

W

ithstanding)

 Film MELF Precision Resistor

Industries

Power Supply

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Telecomm

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●

Meter

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Medical

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Automotive

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●

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●

●

●

Lighting

●

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●

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●

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●

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Surface Mount Enabled

●

●

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●

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●

Firstohm

Product Reference Table

MMP

(V)

MO

MP

MSD MVM MVR

NFR NWA PMA

PPR

PSR

PWR

R-

Series SCP

SFP

SFP

(V)

SGS

SLC

SM

SRM

SSR

SWA SWM

WA

ZMM ZOM

Metal Film MELF Precision Resistor(V

ehicle Grade)

Metal Oxide Film Fixed Resistor

Metal Film Precision Resistor

Pulse Safety Resistor

Medium 

V

oltage MELF Resistor

Medium 

V

oltage 

Resistor

Non Flammable Carbon Film Resistor

Non-inductive 

W

ire 

W

ound Resistor

Professional Metal Film 

Axial Resistor

Pulse Protective Resistor

Power Sink Resistor

Power Metal Film Resistor

Carbon Film Power Resistor

Short Circuit Protection Resistor

Stabilized Film Power MELF Resistor

 Stabilized Film Power MELF Resistor(V

ehicle Grade)

Spark-Gap Sur

ge 

Absorber

Slug Resistor Center Coated

Stabilized Metal Film MELF Resistor

Sur

ge Resistant MELF Resistor

Sur

ge Safety Resistor

Anti-Sur

ge 

W

irewound 

Resistor

Anti-Sur

ge 

W

irewound MELF Resistor

W

irewound Resistors

Zero Ohm Metal Film MELF Resistor

Zero Ohm Metal Film Resistor

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●

Firstohm

September 30, 2016

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general@firstohm.com.tw

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Product Summary

1969

Established in Taipei, Taiwan

* All products are RoHS/REACH compliant unless otherwise specified.      * NOTE 1: patent pending

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

C3

Composite Film-Type Ceramic Composition Resistor

• Innovative and cost-effective C3 technology (NOTE 1)
• Conforms to ANSI/AAMI norm EC53:1995/(R)2008 5.5.3
• 

Suitable replacement for ceramic composition resistors, which are 

required in most applications.

• Maximum permissible surge voltage: 15KV
• Typical 1.2/50us pulse load: 90000W

1W

33R ~ 22K

±5%, ±10%, 

±20%

C3M100 

Composite Film - Type Ceramic Composition MELF Resistor

• SMD-enabled structure
• 

Suitable replacement for ceramic composition resistors, which are 

   requiements in most applications.
• Maximum permissible surge voltage: 15KV
• Typical 1.2/50μs pulse load: 20000W

1W

33R ~ 22K

±5% ~ 20%

CM

Carbon Film MELF Resistor

 SMD enabled structure
 Excellent solderability termination

1/6W ~ 1/2W

0.51R ~ 10M

± 5%

 

September 30, 2016

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general@firstohm.com.tw

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1986

Acquired precision resistor 

technology from Japan

* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

CSM 

Current Sense MELF Resistor

• High power handling with superior reliability and stability
• Conformal multi-layer coating against humidity
• SMD enabled structure with excellent solderability
• 

HeatSinker

TM

 technology for better heat dissipation

• Typical temperature coefficient: 50ppm ~ 600ppm

1/4W ~ 3W

10mR ~ 510mR

± 1% ~ 5%

CSR 

Current Sense Resistor

• Offers better reliability than regular low-ohm resistors using our 

proprietary HeatSinker

TM

 technology 

• Lead-free tin plated deoxygenized copper wire provides stable value of 

resistor during operation. 

• Flame-proof coating available
• Typical temperature coefficient: 100ppm ~ 300ppm

1/4W ~ 5W

68mR ~ 510mR

± 1% ~ 5%

EFP

Enhanced Film Power MELF Resistor

• High power handling
• Superior reliability and stability
• SMD enabled structure with excellent solderability
• Typical temperature coefficient: 200ppm ~ 800ppm

1/2W ~ 5W

0.51R ~ 10M

± 0.5% ~ 5%

 

September 30, 2016

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general@firstohm.com.tw

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* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

1989

Acquired chip resistor technology 

from Japan

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

EFR

Enhanced Film Fixed Resistor

• Flameproof multi-layer coating equivalent to UL 94 V-0
• Flameproof feature equivalent to overload test UL 1412
• High power handling in small size
• Typical temperature coefficient: 50ppm ~ 500ppm

1/2W ~ 5W

1R ~ 1M

± 1%, ± 2%, ± 5%

ESM

ESD Surge Absorber MELF

• Protects the circuit by sparking over the porous layer when surge exceeds 

the spark-over voltage

• 

Patented construction with reduced costs

• High insulation resistance, low capacitance, and fast response time

80A @2/10μs
60A @8/20μs

Surge

Current

Capacity

1300V                       

DC 

Spark-Over 

Voltage

± 30%

FGE

Fusible Resistor

• Flameproof multi-layer coating equivalent to UL 94 V-0
• Flameproof feature equivalent to overload test UL 1412
• Color code per MIL & EIA standards
• Special tin-plated electrolytic copper lead wire
• Typical fusing condition - (a) Standard Type: Fuses within 10 sec. at 5W ~ 

6.25W (b) Power Types: Fuses within 60 sec. at 8W ~ 24W

1/4W ~ 3W

2R2 ~ 15K

± 5%

 

September 30, 2016

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1991

Developed Surge/Pulse Resistant Resistors 

Product Summary

* All products are RoHS/REACH compliant unless otherwise specified.

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

FGE26C

Fusible Resistor Constant Current

• Delay fusing within 60 sec. in case of excessive current
• Constant current fusing type

• Fuses at low magnification of power rating (5.2 times)

• Flameproof multi-layer coating equivalent to UL 94 V-0

• Flameproof feature equivalent to overload test UL 1412

• Special tin-plated electrolytic copper lead wire

• Fuses within 10 sec. at 1.6W

1/4W

0R1 ~ 0R91

±5% ~ 10%

FM

Fusible MELF Resistor

• SMD enabled structure
• Excellent solderability termination
• Fuses within 10 sec. at 9.8W ~ 10.5W

1/3W ~ 1/2W

2R2 ~ 10K

± 5%

HFT

High Frequency Terminator Resistor

 SMD enabled structure
 Superior frequency response
 Excellent solderability termination

1/4W ~ 2W

25R ~ 75R

± 0.1% ~ 1%

 

September 30, 2016

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Resistor

Key Features

Power Rating

Ohm Range

Tolerance

HVM

High Voltage MELF Resistor

• Handles much higher working voltage than general purpose resistors 
• Pure tin-plated termination for excellent solderability
• SMD enabled structure
• Anti-surge feature available
• Maximum working voltage: 600V DC ~ 8400V DC

1/6W ~ 3W

56K ~ 68M

± 1% ~ 5%

HVR

High Voltage Resistor

• Special conductive film withstands high voltage

• Maximum working voltage far over that of general-purpose resistors

• Suitable for applications such as TV’s, high voltage power supply, and 

high voltage detection.

• Entire series is VDE0860 (EN60065) approved under license number 

40011593

• Maximum working voltage: 1.6KV DC ~ 12KV DC

• Typical temperature coefficient: 200ppm ~ 800ppm

1/4W ~ 3W

91K ~ 100M

± 1%
± 5%

HVR

High Voltage Resistor (High Power)

• 

Special cond

uctive film withstands voltage far over the maximum working 

voltage of general-purpose resistors.

• Suitable for applications such as TV’s, high voltage power supply, and 

high voltage detection.

• Maximum working voltage: 35KV DC

• Typical temperature coefficient: 800ppm

10W ~ 15W

100K ~ 100M

± 1%, ± 5%

 

* All products are RoHS/REACH compliant unless otherwise specified.

1991

Developed MELF Resistor 

Product Summary

September 30, 2016

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1998 

Developed High-Voltage Resistors 

* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

IG

Ignition Fixed Resistor 

 Special coating technique to ensure fast ignition
 Color code per MIL & EIA standards
 Special conductive film to fuse at high temperature
 Auto cut-off after fusing/no sustainging fire hazard
 Special tin-plated electrolytic copper lead wire for optimal ease of 

   soldering and mounting

1/6W

1R ~ 150R

± 5%

ISC

Ignition Noise Suppression Resistor (Ceramic Film Composite Type)

• Dedicatedly designed for high-voltage spark ignition systems
• Proprietary ceramic composite withstands high-voltage surge impacts 

with long-term stability.

• One of few sources in the world capable of manufacturing such type of 

resistor

1/2W ~ 3W

1K ~ 10K

±5% ~ 20%

ISW

Ignition Noise Suppression Resistor (Wirewound Type)

• Dedicatedly designed for high-voltage spark ignition systems
• Enhanced weld spot is reliable against surge with long-term stability

2W ~ 3W

1K ~ 5K

±5% ~ 20%

     

September 30, 2016

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* All products are RoHS/REACH compliant unless otherwise specified.

1999

Established management system according to ISO14000 standards

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

M-Series

Metal Film Fixed Resistor

 Conformal multi-layer coating
 Color code per MIL & EIA standards
 Special tin-plated electrolytic copper lead wire

1/6W ~ 3W

0R1 ~ 10M

± 0.1% ~ 5%

MM 

Metal Film MELF Resistor

• SMD enabled structure
• Excellent solderability termination
• Typical 1.2/50us pulse load: 32W ~ 70W
• Typical temperature coefficient: 25ppm ~ 100ppm

1/6W ~ 1/2W

0R51 ~ 10M

± 1%, ± 2%,

± 5%

MM102

 

Metal Film MELF Resistor

• SMD-enabled structure
• Excellent solderability termination
• Typical temperature coefficient: 25ppm - 100ppm

0.2W

0.22R ~ 2.2M

±0.5% ~ 5%

 

September 30, 2016

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2001

ISO 9001 certified

* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

MM(P)

Metal Film MELF Resistor (Pulse Withstanding)

• SMD enabled structure
• Excellent solderability termination
• Enhanced pulse withstanding capability 
• Typical temperature coefficient: 50ppm, 100ppm

1/6W ~ 1/2W

0R1 ~ 330K

± 1%, ± 2%,

± 5%

MMP

Metal Film MELF Precision Resistor

• SMD enabled structure
• Excellent solderability termination
• Typical 1.2/50us pulse load: 32W ~ 70W
• Typical temperature coefficient: 5ppm ~ 50ppm

1/6W ~ 1/2W

10R ~ 1M

± 0.1%, 

± 0.25%,

± 0.5%

MMP(V)

Metal Film MELF Precision Resistor, Vehicle Grade

 AEC-Q200 Compliant
 Excellent solderability termination
 Typical 1.2/50μs pulse load: 35W - 80W
 Typical temperature coefficient: 25ppm - 100ppm

0.25W ~ 0.5W

10R ~ 1M

±0.1% ~ 0.5%

 

September 30, 2016

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general@firstohm.com.tw

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* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

2004

High-Voltage Resistor (HVR series) passed VDE0860 (EN60065)

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

MO

Metal Oxide Film Fixed Resistor

 

Flameproof multi-layer coating equivalent to UL 94 V-0

 

Flameproof feature equivalent to overload test UL 1412

 Solvent resistant

 Special tin-plated electrolytic copper lead wire

1/2W ~ 10W

0R1 ~ 330K

± 5%

MP

Metal Film Precision Resistor

• Conformal multi-layer coating
• Color code per MIL & EIA standards
• Special tin-plated electrolytic copper lead wire
• Typical temperature coefficient: 10ppm ~ 50ppm

1/6W ~ 1/2W

10R ~ 1M

± 0.05% ~ 0.5%

MSD

Pulse Safety Resistor

• Special composite film on high grade ceramic substrate

 Flameproof multi-layer coating equivalent to UL 94 V-0

 Flameproof feature equivalent to overload test UL 1412

• Excellent anti-surge capability. Typical 1.2/50us pulse load: 

   140W ~ 4500W

• Absorbs pulse from city power line, direct crossing or inductive coupling and 

protects electric equipment or parts from accidental shock

• 

Low-cost alternative to wire-wound resistors

1/4W ~ 6W

0R1 ~ 1M

± 0.1% ~ 5%

 

September 30, 2016

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2008

Developed Current Sense MELF Resistor

* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

MVM

Medium Voltage MELF Resistor

 SMD enabled structure
 Anti-surge feature available
 Pure tin-plated termination for excellent solderability
 Handles much higher working voltage than general purpose resistors
 Maximum working voltage: 750V DC - 1,000V DC

1/6W ~ 1/4W

56K ~ 40M

±5%

MVR

Medium Voltage Resistor

• Higher working voltage with improved reliability
• Proprietary conductive film
• Especially suitable for SMPS & lighting devices
• Low-cost alternative to metal-glazed resistors
• Maximum working voltage: 550V DC ~ 7KV DC
• Typical temperature coefficient: 100ppm ~ 800ppm

1/4W ~ 2W

47K ~ 100M

± 0.1% ~ ± 5%

NFR

Non Flammable Carbon Film Resistor

 Conformal multi-layer non-flammable coating
 Color code per MIL & EIA standards
 Special tin-plated electrolytic copper lead wire

1/6W ~ 2W

1R ~ 10M

± 5%

 

September 30, 2016

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general@firstohm.com.tw

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* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

2010

First non-resistor product officially launched - Spark-Gap Surge Absorber (SGS)

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

NWA

Non-inductive Wire Wound Resistor

• Flameproof multi-layer coating equivalent to UL 94- V-0

• Flameproof feature equivalent to overload test UL 1412

• Special wire winging technique

• Special tin-plated electrolytic cooper lead wire

6W ~ 10W

0.1R ~ 1K1

±5% 

PMA

Professional Metal Film Axial Resistor

• Conformal multi-layer coating
• Excellent stability and better power handling 
• Typical temperature coefficient: 5ppm ~ 100pm

2/5W ~ 1.2W

1R ~ 4M7

± 0.1% ~ 5%

PPR

Pulse Protective Resistor

• Application: high-frequency, sharp-impulse circuits.

• Protects active components in missile detonators, triac switching circuits, 

etc.

• Offers better performance than carbon composition resistor.

• No "sintering effect" caused by high surge that greatly decreases 

resistance value.

• Conformal multi-layer non-flammable coating

• Maximum permissible surge voltage: 5KV ~ 20KV

• Typical 1.2/50us pulse load: 75W ~ 1300W

1/4W ~ 2W

2R2 ~ 4M7

± 5%

 

September 30, 2016

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2011

SGS patent granted by European Patent Office

* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

PSR

Power Sink Resistor

• Designed to replace 

cement resistors

• 

Auto insertion feasible

• Enhanced conductive film absorbs pulse noise

• Superior-grade ceramic core dissipates heat efficiently

• Flameproof multi-layer coating equivalent to UL 94 V-0

• 

Fl

ameproof feature equivalent to overload test UL 1412

• Maximum permissible surge voltage: 20KV

• Typical 1.2/50us pulse load: 1700W

6W

1R ~ 4M7

± 5%

PWR

Power Metal Film Resistor

• Conformal multi-layer coating
• Color code per MIL & EIA standards
• Special tin-plated electrolytic copper lead wire
• Typical temperature coefficient: 250ppm

0.6W ~ 2W

0R22 ~ 1M

± 5%

R-Series

Carbon Film Power Resistor

 Conformal multi-layer coating
 Color code per MIL & EIA standards
 Special tin-plated electrolytic copper lead wire
 Non-flammable coating option available

1/6W ~ 3W

1R ~ 10M

± 5%

 

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* All products are RoHS/REACH compliant unless otherwise specified.

2012

SGS patent granted in Japan, China, and Korea

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

SCP

Short Circuit Protection Resistor

• Advanced multi-functional design

• Cut-off on overload or accidental short circuit

• Transient withstanding for power-line coupling

 Flameproof multi-layer coating equivalent to UL 94 V-0

 Flameproof feature equivalent to overload test UL 1412

• 

Possible alternative to wire-wound resistors

• Maximum overload voltage: 600V ~ 700V

• Fuses within 60 sec. at 12W ~ 30W

1/2W ~ 3W

2R2 ~ 10K

± 5%

SFP

Stabilized Film Power MELF Resistor

• Low temperature coefficient and tolerances
• Excellent stability
• Superior power handling
• Typical temperature coefficient: 50ppm ~ 200ppm

1/2W ~ 3W

0R5 ~ 10M

± 0.5% ~ 5%

SFP(V)

 

Stabilized Film Power MELF Resistor, Vehicle Grade

• AEC-Q200 Complicant

• Low temperature coefficient and terance

• Superior power handing

• Typical temperature coefficient: 25ppm - 50ppm

1/2W ~ 3W

1K ~ 5K

±1% ~ 5 %

 

September 30, 2016

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2012

Introduced C3 – Composite Film - Type Ceramic Composition Resistor

* All products are RoHS/REACH compliant unless otherwise specified.

** estimated

Product Summary

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

SGS

 

Spark-Gap Surge Absorber 

• Low-cost patented construction (EP 09000962.2)
• No light-dark effect
• Low capacitance / short response time / fast ignition
• Response time: ≤1ns

80A @2/10us
60A @8/20us

Surge 

Current

Capacity

1550V ~ 3300V

DC

Spark-Over

Voltage

± 30%

SL

Slug Resistor

 Specially treated metal caps withstand abrasions, impacts, 

   and corrosions, so as to reduce contact resistance during    

   operation. conductive film is enhanced to withstand abrasions,    

   impacts, and corrosions as well. Suitable for clip-in (embedded) 

   application like switches with neon indicators, neon/LED 

   modules, LED display array, etc.

 Protective coating is optional

1/6W ~ 1/2W

1R ~ 9M1

± 5% ~ 10%

SLC

Slug Resistor Center Coated

 Specially treated metal caps withstand abrasions, impacts, and 

   corrosions, so as to reduce contact resistance during operation. 

   conductive film is enhanced to withstand abrasions, impacts, and    

   corrosions as well. 

   Suitable for clip-in (embedded) application like switches with neon 

   indicators, neon/LED modules, LED display array, etc.

1/6W ~ 1/2W

1R ~ 9M1

± 5% ~ 10%

September 30, 2016

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2014

Anti-Surge Wirewound Resistor

* All products are RoHS/REACH compliant unless otherwise specified.

VDE

REG.-Nr. A830

VDE

REG.-Nr. E932

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

SM

Stabilized Metal Film MELF Resistor

• Conformal coating against humidity
• Excellent solderability termination
• Typical 1.2/50us pulse load: 32W ~ 70W
• Typical temperature coefficient: 25ppm ~ 100ppm

1/6W ~ 1/2W

0R51 ~ 10M

± 1% ~ 5%

SRM

Surge Resistant MELF Resistor

• IEC60065 & UL1676 Compliant

• Miniaturized MELF design handles high power

• Special conductive film enhances anti-surge capability

• Absorbs harmful surge which damages precious devices or components

• SMD-enabled alternative to carbon composition resistors

• Maximum permissible surge voltage: 2KV ~ 10KV

• Typical 1.2/50us pulse load: 60W ~ 6000W 

• Approved to the safety requirement of VDE0860 under license

   number 40043961 

1/4W ~ 3W

0R1 ~ 1M

± 1% ~ 5%

SSR

 

Surge Safety Resistor

• Designed to replace carbon or ceramic composition resistor 

• Absorbs harmful surge energy, so to prevent hazard of fire and circuit 

damage caused by surge energy with a flame proof coating

• High-surge applications: fuel ignition systems, power charging/

discharging circuits, TV sets, etc.

• Maximum permissible surge voltage: 7.5KV ~ 35KV

• Typical 1.2/50us pulse load: 450W ~ 17000W

1/4W ~ 5W

10R ~ 330K

± 5%

 

Product Summary

September 30, 2016

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* All products are RoHS/REACH compliant unless otherwise specified.

Resistor

Key Features

Power Rating

Ohm Range

Tolerance

SWA

Anti-Surge Wirewound Resistor

 Flameproof multi-layer coating equivalent to UL 94 V-0

 Flameproof feature equivalent to overload test UL 1412

 SWA series can be adopted for high surge applications such as high 

   rush current protection for power capacitor, motor start-up protection, 

   car & motorcycle engine ignition, etc. to absorb harmful surge energy 

   and prevent hazard of circuit damage caused by surge impact.

 Enhanced weld spot is reliable against surge impact

 Special tin-plated electrolytic copper lead wire

 Typical 1.2/50us pulse load: 12000W ~ 36000W**

1W ~3W

0R1 ~ 1K5

± 5%

SWM

Anti-Surge Wirewound MELF Resistor

 SMD enabled structure

 Flameproof multi-layer coating equivalent to UL 94 V-0

 Flameproof feature equivalent to overload test UL 1412

 SWM series can be adopted for high surge applications such as high 

   rush current protection for power capacitor, motor start-up protection, 

   car & motorcycle engine ignition, etc. to absorb harmful surge energy 

   and prevent hazard of circuit damage caused by surge impact.

 Enhanced weld spot is reliable against surge impact

 Typical 1.2/50us pulse load: 8000W ~ 32000W**

1W ~4W

0R1 ~ 1K5

± 5%

WA

Wirewound Resistors

 Flameproof multi-layer coating mequivalent to UL 94 V-0
 Flameproof feature equivalent to  overload test UL 1412
 Color code per MIL & EIA standards
 Special tin-plated electrolytic copper lead wire

1/2W ~ 8W

0R1 ~ 3K3

± 2%
± 5%

 

Product Summary

September 30, 2016

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Resistor

Key Features

Power Rating

Ohm Range

Tolerance

ZMM

Zero Ohm Metal Film MELF Resistor

 SMD enable structure
 Excellent solderability termination
 Stable metal film construction

2A ~ 4A

Maximum

Current

< 20mR

N/A

ZOM

Zero Ohm Metal Film Resistor

 Conformal multi-layer coating against humidity
 Very low resistance
 Stable metal film construction
 Special tin-plated deoxygenized copper wire for resistance 

stabilization during operation

3A ~ 5A

Maximum

Current

< 10mR

N/A

 

* All products are RoHS/REACH compliant unless otherwise specified.

Product Summary

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Color Code for 

             Discrete Resistors

COLOUR

1ST BAND

2ND BAND

3RD BAND

MULTIPLIER

TOLERANCE

Black

0

0

0

1

Brown

1

1

1

10

1

± 1%

Red

2

2

2

10

2

± 2%

Orange

3

3

3

10

3

Yellow

4

4

4

10

4

Green

5

5

5

10

5

± 0.5%

Blue

6

6

6

10

6

± 0.25%

Violet

7

7

7

10

7

± 0.1%

Grey

8

8

8

10

6

± 0.05%

White

Gold

10

-1

± 5%

Silver

10

-2

± 10%

3-BAND-CODE

(Tolerance ±2%, ±5%, ±10%)

4-BAND-CODE

(Tolerance ±0.25%, ±0.5%, ±1%)

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Color Code for 

             Discrete Resistors

COLOUR

1ST BAND

2ND BAND

3RD BAND

MULTIPLIER

TOLERANCE

Black

0

0

0

1

Brown

1

1

1

10

1

± 1%

Red

2

2

2

10

2

± 2%

Orange

3

3

3

10

3

Yellow

4

4

4

10

4

Green

5

5

5

10

5

± 0.5%

Blue

6

6

6

10

6

± 0.25%

Violet

7

7

7

10

7

± 0.1%

Grey

8

8

8

10

6

± 0.05%

White

Gold

10

-1

± 5%

Silver

10

-2

± 10%

5-BAND-CODE

(Tolerance ±0.1%)