Due to the current worldwide events, Race Spec Will be ceasing normal day to day operations effective immediately (3/13/20).

This decision was made in an effort to protect our staff and families along with simply doing our part for our neighbors, strangers, and fellow human beings and we urge you to do the same.

Everyone here is healthy and staying safe and we hope the same for our clients and their families.

-We are maintaining a strict locked door policy   
-No pick-ups, drop-offs, or visits  NO EXCEPTIONS


We have resumed shipping daily with a single staff member rotating shifts to comply with social distancing guidelines.

Shipments will be processed in the order in which they are received with those selecting expedited shipping methods taking priority.


-Exclusions may apply depending on stock levels
-Special order items may require extended lead times

Please keep the above policies in mind when planning and placing your orders so we can meet your expectations.

Stay safe!


Your Cart is Empty


MSEL Solid State Battery Isolator

4 items left

Built with safety in mind, MSEL SSR Isolators have been designed with the sole purpose of living in a motorsport environment. Utilizing solid state switching components, the Master Relay has excellent temperature resistance, as well as an aluminum enclosure that is lightweight and robust in even the harshest motorsport environment.
Both isolators are identical and offer the same functionality aside from the connection type. The Club Level isolator includes a flying lead harness to be terminated to the connector of your choosing. The Professional Level isolator utilizes a Souriau connection (mating connector available in the dropdown).

MSEL Quick Start Guide
MSEL User Manual
MSEL CAN Communications Template (.dbc)

  • Meets all the FIA requirements for a battery isolator
  • Solid state using MOSFET technology with no moving parts
  • 200A continuous current at 25 degrees C (1000A peak current)
  • Alternator discharge before disconnection of the battery to avoid load dump which can damage electronics in the vehicle
  • Switches positive
  • CAN-bus messaging for logging, diagnostics and safety
    • Reason for shut down (internal or external switch, over current, over temperature, CAN command to shut down etc)
    • Current passing through Master Relay
    • Voltage at Master Relay output
    • Voltage at Battery
    • Shut down command for other devices on CAN
  • LED status light
  • Souriau 8STA connector for switched inputs, ground, CAN and output trigger
  • Built in short protection
  • Supply voltage between 8 and 30V
  • 0.001A current draw in standby mode
  • CNC aluminium case sealed to IP63
  • 115g

PLEASE NOTE: As of 1/23 we are SOLD OUT of both club and professional variants. You may submit your order however they will be fulfilled once our restock arrives in the next two weeks. Backorders will be fulfilled in the order in which they are received.