KOA Speer...

A Leader in
Automotive Electronics


Although most engineers know KOA as the world leader in thick film resistors, many are not aware of the extent of our broad line of passive components. In addition to our standard products, we’ve specifically developed a wide range of high-reliability and anti-sulfuration components for the demanding applications found within the automotive industry.

KOA Speer's family of automotive components includes thin and thick film resistors, specialty resistors and arrays, power shunt resistors, current sense resistors, circuit protection and thermal sensors, and inductors. And we’re the industry’s most recognized and award-winning supplier for achieving the highest product quality, on-time delivery and responsive customer service. You can count on KOA Speer as your Automotive Electronics partner.

Automotive Solutions

To view the KOA Speer components used for a particular area, please click the colored boxes below or select the system from the list on the right.

Engine Control Unit Air Flow Sensors Engine Ignition Transmission Control Air Conditioner Control System Electric pump Electric Power Steering Infotainment/Car Navigation Hybrid system DC/DC Converter Hybrid system Battery Management System Exhaust Emissions Sensor Control Circuit Tire-Pressure Monitoring System ABS - Brake Control System Body Control Module Motor Control for Power Window, Door and Mirror Power Seat Control/Seatbelt Control Instrument Panel, Electronic Relay HID - Headlight Control Smart Key System

KOA Speer's Family of Automotive Components

Thick Film Chip Resistors

General Purpose RK73B

  • Tolerance: ±2%, ±5%
  • Resistance values: 1 ~ 22MΩ
  • Sizes available: 0201 ~ 2512
  • Operating Temperature: -55°C ~ +155°C

 

Precision RK73H

  • Tolerance: ±0.5%, ±1%
  • Resistance values: 1 ~ 10MΩ
  • Sizes available: 0201 ~ 2512
  • Operating Temperature: -55oC ~ +155oC

 

50ppm/°C Thick Film RK73G

  • High precision TCR 50ppm/°C
  • Resistance values: 10 ~ 10MΩ
  • Sizes available: 0402 ~ 1206
  • Tolerance: ±0.5%, ±1%

 

Surge Current Thick Film Resistor SG73

  • Excellent surge and pulse performance
  • Up to six times the power rating at 1ms compared to standard RK73
  • ESD (electro static discharge)
  • Resistance values: 1~ 1MΩ
  • Sizes available: 0603 ~ 2512
  • Tolerance: ±10%, ±20%

 

Surge Protection Thick Film SG73S

  • Provides better ESD protection that the standard RK73
  • Resistance values: 1 ~ 10MΩ
  • Sizes available: 0402 ~ 1210
  • Tolerance: ±0.5%, ±1%, ±2%, ±5%

 

Pulse Precision Thick Film SG73P

  • Provides higher pulse rating than the standard RK73
  • Resistance values: 1 ~ 10MΩ
  • Sizes available: 0402 ~ 1210
  • Tolerance: ±0.5%, ±1%, ±2%, ±5%

Anti-Sulfur Chip Resistors

Thick Film Chip Resistors: RK73-RT

  • Pass ASTM-B809 Anti-Sulfur Testing
  • Excellent anti-sulfur characteristics due to the use of high sulfur-proof inner top electrode material
  • Excellent heat and weather resistance by the use of metal glaze thick film
  • General Purpose RK73B-RT
  • Precision RK73H-RT
  • Zero Ohm Jumper RK73Z-RT

 

Wide Terminal Thick Film Resistor WK73-RT

  • Anti-sulfur type, wide-side termination (reverse geometry)
  • Pass ASTM-B809 Anti-Sulfur Testing
  • Excellent anti-sulfur characteristics due to the use of high sulfur-proof inner top electrode material
  • Power Rating: 0.75W, 1W, 1.5W, 2W
  • Resistance values: 10m ~ 1MΩ
  • Size available: 0612 ~ 1225
  • Operating Temperature: -55oC ~ +155oC

 

Surge Current Thick Film Resistor SG73-RT

  • Pass ASTM-B809 Anti-Sulfur Testing
  • Excellent anti-sulfur characteristics due to the use of high sulfur-proof inner top electrode material
  • Resistance values: 1 ~ 10MΩ
  • Sizes available: 0402 ~ 1210
  • Tolerance: ±0.5%, ±1%, ±2%, ±5

 

Surge Protection Thick Film Resistor SG73S-RT

  • Pass ASTM-B809 Anti-Sulfur Testing
  • Excellent anti-sulfur characteristics due to the use of high sulfur-proof inner top electrode material
  • Provides better ESD protection that the standard RK73
  • Resistance values: 1 ~ 10MΩ
  • Sizes available: 0402 ~ 1210
  • Tolerance: ±0.5%, ±1%, ±2%, ±5%

 

Circuit Protection

Varistor

Multilayer Type Metal Oxide Varistor NV73DL

  • Surge voltage protectors for Automotive ideal for countermeasures against ESD
  • Max. Peak Current (8/20µS): 80 ~ 300A
  • Varistor voltage: 12 ~ 82
  • Max. Energy (J): 0.1 ~ 1.5
  • Sizes available: 0603 ~ 1206

 

Load Dump Surge Varistor NV73DS

  • Symmetrical non-linearity V-l characteristics absorb positive and negative surges
  • Max. Peak Current (8/20µS): 200A
  • Varistor voltage: 27, 47
  • Max. Energy (J): 63 ~ 70
  • Size: 2420

 

Fuses

Chip Current Fuse CCP

  • Immediate cut-off of excessive heat
  • Rapid change of temperature: -55oC ~ +125oC, 10 cycles
  • Current Rating: 0.75A ~ 2.5A
  • Fusing Current: 1.5A ~ 6.3A
  • Sizes available: 1206, 1210

 

Chip Current Fuse CCF

  • Rapid change of temperature: -55oC ~ +125oC, 10 cycles
  • Ceramic case provides excellent mechanical strength
  • Rated Current: 400mA ~ 15A
  • Internal R (mW) Max.: 3.5 ~ 650
  • 2410 size

 

Chip Current Fuse TF16VN

  • SMD over current protectors
  • Rapid change of temperature: -55oC ~ +125oC, 10 cycles
  • Rated Current: 0.80A ~ 3.15A
  • Internal R (mW) Max.: 40 ~ 200
  • Rated Voltage: 32V
  • 0603 size

Current Sense Resistors

Wide Terminal Thick Film Resistor WK73

  • High power ratings as a result of its enhanced heat dissipation
  • Superior thermal shock characteristics
  • Power Rating: 0.75W, 1W, 1.5W, 2W
  • Resistance values: 10m ~ 1MΩ
  • Size available: 0612 ~ 1225
  • Operating Temperature: -55oC ~ +155oC

 

Chip Type Power Shunt PSB

  • Easy to absorb the thermal expansion due to KOA’s original terminal structure
  • Power rating: 6W, 7W
  • Resistance values: 0.2m, 0.75m, 1mΩ
  • TCR: ±75, ±100ppm/oC

 

Chip Type Power Shunt PSE/PSI

  • Flat structure allows smooth current flow
  • Power rating: 3W, 5W
  • Resistance values: 0.5m, 1m, 1.5m, 2m, 3m, 4mΩ
  • TCR: ±50, ±150ppm/oC

 

Molded Current Sense Resistor

Molded Current Sense Resistor SL07, SL1, SL2, SL3, SLN2, SLZ, TSL

  • Flame retardant resin molding (UL94 V-0)
  • Power rating: SL07: 0.75W, SL1: 1W, SL2: 2W, SL3: 3W, SLN2: 2W
  • TSL1 (low profile): 1W, SLZ1: zero ohm
  • Resistance values: 3M ~ 22MΩ
  • Tolerance: ±0.5%, ±1%, ±2%, ±5%
  • Operating Temperature: -55oC ~ +180oC

 

Higher Power Molded Current Sense Resistor SLW07, SLW1, SLN3, SLN5

  • Higher Power Ratings: SLW07: 1W, SLW1: 1.5W, SLN3: 3W, SLN5: 7W
  • Flame retardant resin molding (UL94 V-0)
  • Resistance values: 5m ~ 200mΩ
  • Operating Temperature: up to +180oC

 

Metal Plate Current Sense Resistor

Metal Plate, Low Resistance Current Sense Resistor  TLR1E: 0402-0.2W TLR2B: 1206-0.5W TLR2H: 2010-1W TLR3A: 2512-1W

  • Resistance values: down to 1mΩ
  • Rated Terminal Part Temperature: 105°C

 

Increased Power Rating Metal Plate Resistors  TLR2BW: 1206-1W TLR3AW: 2512-2W

  • Resistance values: down to 0.5mΩ
  • TCR:+50ppm/°C

 

Higher Power Rating Metal Plate Resistors  TLR2A: 0805-1W TLR2BP: 1206-1.5W TLR2HW: 2010-2W TLR3AP: 1206-1.5W

  • Resistance values: down to 0.5mΩ
  • Operating Temperature up to +170°C

 

Metal Plate Current Sense Resistor LR72

  • Superior thermal expansion cycling
  • Power rating: .25W, .5W, 1W
  • Resistance values: 2m ~ 8mΩ
  • Operating Temperature: -40oC ~ +155oC, -40oC ~ +180oC

 

Metal Plate Current Sense Resistor LR

  • Suitable for high power current detection
  • Super low resistance values: 3m ~ 100mΩ
  • Diameter: 0.6 ~ 2.9
  • Operating Temperature: -40oC ~ +180oC

 

Low Resistance Flat Chip Resistor

Lo-Ohm, Thick Film Current Sense Resistor SR73

  • Low Resistance values: 0.24 ~ 10Ω
  • Sizes available: 0201 ~ 2512
  • Tolerance: ±0.5%, ±1%, ±2%, ±5%
  • TCR: ±100 ~ ±1000

Thermal Sensor

Platinum Thin Film Thermal Chip Sensor SDT73V

  • TCR in accordance to JIS, DIN-IES Standards
  • Resistance values: 100Ω, 500Ω
  • TCR: 3850ppm/oC
  • Operating Temperature: -55oC ~ +155oC

 

Platinum Thin Film Thermal Sensor Resistor SDT101

  • Stable characteristics in long time use with an excellent environment resistance
  • Usable as a heater of hot film flow sensor
  • Temperature Range: -55oC ~ +300oC
  • Resistance values: 10, 100, 500Ω
  • TCR: 3500ppm/oC

 

Linear PTC Flat Chip Resistor LT73V

  • SMD thin film technology with thermo-perceptivity
  • TCR: 150 ~ 4500ppm/oC
  • Rated Ambient Temperature: +85oC
  • Operating Temperature: -55oC ~ +155oC
  • Sizes available: 0805, 1206

MELF Type Resistors

Fixed Ceramic MELF Resistor CPCN

  • Suitable for noise suppression of engine ignition systems
  • Power Rating: 0.5W, 1W, 1.5W, 2W
  • Resistance values: 1k, 2k, 5k, 10k, 15kΩ
  • TCR: -1200 +300ppm/oC
  • Operating Temperature: -40oC ~ +200oC

Thin Film Chip Resistors

High Heat Resistance Thin Film RN73H

  • High reliability and stability at elevated temperature
  • Improved moisture resistance by glass passivation
  • Resistance values: 10 ~ 1MΩ
  • TCR: ±5, ±10, ±25, ±50, ±100ppm/oC
  • Sizes Available: 0402 ~ 1210

 

Thin Film Resistor Networks RB(X), RD(X), RT(X)

  • Excellent resistance matching TCR tracking and stability
  • Custom circuits available
  • Packages: SOT-23, QSOP, SOIC-N
  • Resistance values: 30 ~ 100kΩ

 

Thin Film Resistor Networks RIA, RNX

  • High precision resistor networks
  • Custom circuits available
  • Packages: QSOP, SOIC-N
  • TCR: ±10, ±25, ±50, ±100ppm/oC
  • Resistance values: 30 ~ 510kΩ

Inductors

High Precision Thin Film Inductor KL73

  • Low DC Resistance, High Q
  • Nominal Inductance: 0.56 ~ 100nH
  • Tolerance: 0.1nH, 0.2nH, ±2%, ±5%
  • Temperature Range: -40oC ~ +155oC
  • Sizes: 0402 ~ 1206

 

High Q Air-Core Chip Inductor KQ

  • Q Measuring Frequency (mHz) 50 ~ 250
  • Nominal Inductance: 1 ~ 10,000nH
  • Tolerance: 0.1nH, 0.2nH, ±2%, ±3%, ±5%, ±10%, ±20%
  • Sizes available: 0402 ~ 1008

 

Power Chip Inductor LPC4235, 4545

  • Low DC resistance and high allowable current
  • Allowable DC current: 0.12 ~ 3.10A
  • Nominal Inductance: 0.82 ~ 2200µH
  • Tolerance: ±10%, ±20%

 

Shielded Choke Coil Inductor LCM1060

  • Original construction & wiring technology
  • Low DC resistance: 9 ~ 880
  • Nominal Inductance: 1.5 ~ 470µH
  • Operating Temperature: -40oC ~ +150oC

 

Transponder Coil (Rx) KT

  • Single LF antenna for receiver
  • High sensitivity ~ 75mV/µT
  • DC resistance: 500 ~ 700kHz min.
  • Nominal Inductance: 2.4 ~ 12mH
  • L, Q Measuring Frequency: 125kHz

Power Type Resistors (Leaded)

Power Type Metal Oxide, Reduced Size Resistor MOS

  • Flame Retardant coating (Equivalent to UL94V-0)
  • Power Rating: 0.5W ~ 5W
  • Resistance values: 10 ~ 100kΩ
  • Operating Temperature: -55oC ~ +200oC

 

High Power Rectangular Wirewound Resistor BGR, BWR, BSR

  • High power resistor in flame-retardant insulated ceramic case
  • Power Rating: 1W ~4W
  • Resistance values: 0.39 ~ 56kΩ
  • Tolerance: ±1%, ±2%, ±5%, ±10%

 

Metal Plate High Power Rectangular Wirewound Resistor BPR

  • Power type current detecting resistor in a flame-retardant ceramic case
  • Power Rating: 2W, 3W, 5W, 10W
  • Resistance values: 0.01 ~ 1Ω
  • Operating Temperature: -40oC ~ +200oC
Transmission Control
Air Conditioner Control System
Electric pump
Hybrid system DC/DC Converter
Battery Management System
Exhaust Emissions Sensor Control Circuit
Instrument Panel, Electronic Relay
Smart Key System
Engine Control Unit