MSEL Master Relay

The MSEL Solid State Master Relay uses MOSFET technology with no moving parts to isolate a vehicle from the battery.

Meeting all FIA requirements, this unit is able to pass 200A continuously while transmitting battery status over the CAN bus. It features a status LED for shutdown causes and an alternator discharge shutdown sequence to avoid load dumping and damage to vehicle electronics.

Expand / Collapse All


  • 200A continuous current at 25 degrees C (1000A peak current)
  • CAN-bus messaging for logging, diagnostics and safety
  • LED Status light
  • Built in short protection
  • Supply voltage between 8 and 30V
  • 0.001A current draw in standby mode


  • CNC machined aluminium case
  • 6 way Deutsch Autosport connector
  • copper plated M6 studs
  • Maximum dimensions are 99 x 70 x 28 mm
  • Sealed to IP63
  • Total mass ~115g

Our Products