£358.80

Ecumaster Battery Isolator
FIA-Compliant Solid-State Master Relay

The Ecumaster Battery Isolator is a compact, motorsport-grade master relay designed for FIA-compliant battery isolation and engine shutdown. Built to perform in the harshest racing environments, it features a fully solid-state design with no moving parts—delivering exceptional reliability while weighing just 83 g.

An integrated alternator load-dump protection circuit protects sensitive electronics during emergency shutdown, eliminating the need for additional external components and helping safeguard expensive ECUs and data systems.

The isolator can be operated using two external switches or triggered via CAN bus, allowing automatic shutdown from systems such as the Ecumaster PMU16 in the event of an impact or other critical condition.

Configuration is handled through CAN bus, and the device transmits diagnostic data that can be used by other systems for monitoring, setup, and troubleshooting. Built-in over-current and thermal protection ensure dependable operation under extreme motorsport conditions. Detailed user manual can be found here

Key features

• Weight: 83g
• Dimensions: 50mm x 100mm x 38.5mm
• Voltage range: 6V – 19V, 28V transient (12V automotive installations only)
• Operating temperature range: -40C + 125C
• Current capability: 300A continuous, peak up to 1000A
• Current measurement resolution 4A
• Current measurement range: -1000A to 1000A
• Current measurement accuracy: ±10%
• Inductive load switching capability: 600mJ
• Enclosure: Anodized aluminium, IP67 rated
• High current terminals: M8 nickel plated terminals
• Power save state current consumption: <1mA
• ON state current consumption: ~20mA
• Engine kill output: 3A, High (VBat), Low (GND) or Hi-Z

Ideal For

• Circuit racing
• Rally and rallycross
• Time attack and track builds
• Professional and amateur motorsport vehicles