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Passive Bauteile Firstohm Widerstände

MELF Resistor

Anti-Sourge Resistor

Automobile

High Precision Resistor

High Voltage Resistor

High Stability Resistor

Die First Resistor Condenser Co., Ltd. (Firstohm) wurde 1969 gegründet und hat sich auf Dünnschicht-MELF-Widerstände spezialisiert.

Firstohm ist eines der wenigen Unternehmen, die Widerstände nach Kundenanforderungen konstruieren können.

Starke R&D konzentriert sich auf Märkte der neuen Generation durch unser innovatives kollaboratives Technologiedesign.

MELF Resistors


CM

Carbon Film MELF Resistor

Features

  • SMD enabled structure
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by Europeann Chemicals Agency
Carbon Film MELF Resistor

CSM

Current Sense MELF Resistor

Features

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

EFP

Enhanced Film Power MELF Resistor

Features

  • High power handling
  • Superior reliability and Stability
  • SMD enabled structure with excellent Solderability
Enhanced Film Power MELF Resistor

ESM

ESD Surge MELF Absorber

Features

  • Protects through 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
ESD Surge MELF Absorber

FM

Fusible MELF Resistor

Features

  • SMD enabled structure
  • Excellent solderability termination
  • RoHS and REACH compliant
Fusible MELF Resistor

HFT

High Frequency Terminator Resistor

Features

  • SMD enabled structure
  • Superior frequency response
  • Excellent solderability termination
High Frequency Terminator Resistor

MM

Metal Film MELF Resistor

Features

  • SMD enabled structure
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency
Metal Film MELF Resistor

MM(P)

Metal Film MELF Resistor (Pulse Withstanding)

Features

  • SMD enabled structure
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency
Metal Film MELF Resistor (Pulse Withstanding)

MM102

Metal Film MELF Resistor - 0102 packing

Features

  • SMD enabled structure
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency
Metal Film MELF Resistor - 0102 packing

SFP

Stabilized Film Power MELF Resistor

Features

  • Low temperature coefficient and tolerances
  • Excellent stability
  • Superior power handling
Stabilized Film Power MELF Resistor

SM

Stabilized Metal Film MELF Resistor

Features

  • SMD enabled structure with excellent solderability
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by Europeann Chemicals Agenc
Stabilized Metal Film MELF Resistor

ZMM

Zero Ohm Metal Film MELF Resistor

Features

  • SMD enabled structure
  • Excellent solderability termination
  • Stable metal film Construction
Zero Ohm Metal Film MELF Resistor



Anti-Surge Resistors


C3

Composite Film-Type Ceramic Composition Resistor

Features

  • Innovative and cost-effective C3 technology
  • Conforms to ANSI/AAMI norm EC53:1995/(R)2008 5.5.3
  • Suitable replacement for ceramic composition resistors,which are required in most applications
Composite Film-Type Ceramic Composition Resistor

SRM

Surge Resistant MELF Resistor

Features

  • MELF packaging yet capable of high power handling
  • Special conductive film enhances anti-surge capability
  • Absorbs harmful surge which damages precious devices or components
Surge Resistant MELF Resistor

SSR

Surge Safety Resistor

Features

  • Designed to replace carbon or ceramic composition resistor,SSR series is applied in high-surge applications such as fuel ignition systems, power charging /discharging circuits,electrocardiograph cables , etc, to absorb harmful surge energy,so to prevent hazard of fire and circuit damage caused by surge energy with a flame-proof coating.
Surge Safety Resistor

SWA

Anti-Surge Wirewound Resistor

Features

  • Flameproof multi-layer coating meets UL 94 V-0
  • Flameproof feature meets overload test UL 1412
  • Enhanced weld spot is reliable against surge
Anti-Surge Wirewound Resistor



Automobile Resistors


ISW

Ignition Noise Suppression Resistor
(Wirewound type)

Features

  • IEC 60115-1
  • Dedicatedly designed for high-voltage spark ignition systems
  • Enhanced weld spot is reliable against surge with long-term stability
Ignition Noise Suppression Resistor

MMP(V)

Metal Film MELF Precision Resistor - Vehicle Grade

Features

  • AEC-Q200 Compliant
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency
Metal Film MELF Precision Resistor

SFP(V)

Stabilized Film Power MELF Resistor - Vehicle Grade

Features

  • AEC-Q200 Compliant
  • Low temperature coefficient and tolerances
  • Excellent stability
Stabilized Film Power MELF Resistor

SWM

Anti-Surge Wirewound MELF Resistor

Features

  • Flameproof multi-layer coating meets UL 94 V-0
  • Flameproof feature meets overload test UL 1412
  • Enhanced weld spot is reliable against surge
Anti-Surge Wirewound MELF Resistor



High Precision Resistors


MPP

Metal Film MELF Precision Resistor

Features

  • SMD enabled structure
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency
Metal Film MELF Precision Resistor

MP

Metal Film Precision Resistor

Features

  • Conformal multi-layer coating
  • Color code per MIL & EIA standards
  • Special tin-plated electrolytic copper lead wire
Metal Film Precision Resistor

PMA

Professional Metal Film Axial Resistor

Features

  • Conformal multi-layer coating
  • Low temperature coefficient and tolerances
  • Excellent stability
Professional Metal Film Axial Resistor

SM

Stabilized Metal Film MELF Resistor

Features

  • SMD enabled structure with excellent solderability
  • Excellent solderability termination
  • Products meet RoHS requirements and do not contain substances of very high concern identified by Europeann Chemicals Agenc
Stabilized Metal Film MELF Resistor



High Voltage Resistors


ESM

ESD Surge MELF Absorber

Features

  • Protects through 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
ESD Surge MELF Absorber

HVM

High Voltage MELF Resistor

Features

  • Handles much higher working voltage than general purpose resistors
  • Pure tin-plated termination for excellent solderability
  • Anti-surge feautre available
High Voltage MELF Resistor

HVR

High Voltage Resistor

Features

  • Special conductive film withstands high voltage
  • Maximum working voltage far over that of generalpurpose resistors
  • Suitable for applications such as TV’s, high voltage power supply, and high voltage detection
High Voltage Resistor

SGS

Spark-Gap Surge Absorber

Features

  • Low-cost patented construction (EP 09000962.2)
  • No light-dark effect
  • Low capacitance / short response time / fast ignition
Spark-Gap Surge Absorber



High Stability Resistors


EFP

Enhanced Film Power MELF Resistor

Features

  • High power handling
  • Superior reliability and Stability
  • SMD enabled structure with excellent Solderability
Enhanced Film Power MELF Resistor

EFR

Enhanced Film Fixed Resistor

Features

  • Flameproof multi-layer coating meets UL 94 V-0
  • Flameproof feature meets overload test UL 1412
  • High power handling in small size
Enhanced Film Fixed Resistor

MP

Metal Film Precision Resistor

Features

  • Conformal multi-layer coating
  • Color code per MIL & EIA standards
  • Special tin-plated electrolytic copper lead wire
Metal Film Precision Resistor

SFP

Stabilized Film Power MELF Resistor

Features

  • Low temperature coefficient and tolerances
  • Excellent stability
  • Superior power handling
Stabilized Film Power MELF Resistor



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