PhotoMOS Automotive Relays for Electric Vehicle (EV), Hybrid Electric Vehicle (HEV), and Plug-in Hybrid Electric Vehicle (PHEV) Applications

Bright TOWARD offers PhotoMOS relays automotive grade with stable and reliable switching operation under critical environment.  Photo emitted D-MOSFET technology (PhotoDMOS) achieves fast switching with high load.  Suitable for EV, HEV, and PHEV applications.  It is also used in infrastructures, such as Battery Management Systems, Motor Control, Power Conversion, and Charging/Discharging.

PhotoMOS relays Automotive

TOWARD PhotoDMOS relay is certified AEC-Q101 as an automotive-grade semiconductor.  A wider range of operating temperatures from -40 to +125 degree C.


The Automotive Electronics Council (AEC) was originally established by Chrysler, Ford, and GM for the purpose of establishing common part-qualification and quality system standards.  From its inception, the AEC has consisted of two Committees:  the Quality Systems Committee and the Component Technical Committee. 

Environmental & Package Stress Test (Pre-condition)

  • Baking:  125C, 24H
  • Moisture soak:  MSL3, 30C, 60% RH, 192H
  • IR reflow:  260C 3cycles

Package Stress

  • Temp Cycle
  • TC Delamination Testing
  • Wire Bond Integrity
  • Resistance to solder heat
  • Bond shear
  • Wire bond Strength
  • Solder ability
  • Die Shear
  • Power and Temp Cycle

ESD Test

  • HBM:  +/-8000V
  • CDM (Charged-Device Model):  +/-1000V

Life Time Stress Test (Chip)


  • Test Condition:  TA=125C, VGS=5V
  • Readout time:  168/500/1000H
  • Sample size:  231


  • Test Condition:  TA=125C, VDS=80% BVDSS
  • Readout time: 168/500/1000H
  • Sample size: 231


  • Test Condition:  TA=85C, R.H.=85%, VDS=100V
  • Readout time: 168/500/1000H
  • Sample size: 231

PhotoMOS relays Automotive grade products

38S-Q / 45S-Q / 47S-Q Series

VDE Certified / UL Certified / AEC-Q101 Certified

Product NameContact FormOperation LED Load Current (MAX)Load Voltage (MAX)Load Current (MAX)On-Resistance (Typ)Output Capacitance (Typ)Off-state Leakage Current (Typ) I/O Breakdown VoltageDevice PackagePackaging
AB38S-Q1A3.0mA600V70mA40 Ohm47pF1.0uA1500VrmsSOP4Stick/Tape
AC38S-Q2A3.0mA600V70mA40 Ohm47pF1.0uA1500VrmsSOP8Stick/Tape
AB45S-Q1A3.0mA60V200mA3.0 Ohm20pF1.0uA1500VrmsSOP4Stick/Tape
AC45S-Q2A3.0mA60V200mA3.0 Ohm20pF1.0uA1500VrmsSOP8Stick/Tape

Request Data Sheet

36-T Series

Product NameContact FormOperation LED Current (Max)Load Voltage (Max)Load Current (Max)On-Resistance (Typ)Output Capacitance (Typ)Off-State Leakage Current (Max)I/O Breakdown VoltageOperating TemperatureDevice PackagePackaging
AA36-T1A8.0mA60V0.5A0.12 Ohm470pF10uA3750Vrms-40 to +125DIP6Stick
AA36F-T1A8.0mA60V0.5A0.12 Ohm470pF10uA3750Vrms-40 to +125SMD6Stick/Tape

Request Data Sheet

58 Series SiC MOSFET for Automotive

New SiC MOSFET relay with AEC-Q101.