Overview Switch high-current loads with absolute reliability using Haltech's 100-amp solid state relay — the professional choice for fuel pumps, cooling fans, and other critical engine systems. Purpose-built for motorsport and performance applications where mechanical relay failures simply aren't acceptable. Technical Specifications Part Number: HT-030202 Maximum Current: 100 Amps continuous Switching Type: Solid state (no mechanical contacts) Control Voltage: Low current ECU output compatible Weight: 0.25kg Why You Need This Mechanical relays are the weak link in high-performance builds — contacts burn out, coils fail, and vibration kills them dead. We've seen too many trackside failures where a £5 mechanical relay takes out an entire race weekend. Solid state relays eliminate these failure modes completely, using semiconductor switching instead of physical contacts that wear, arc, and corrode. This becomes critical on builds running high-flow fuel pumps (Walbro 450s, DeatschWerks DW400s), multiple cooling fans, or nitrous solenoids. The 100-amp rating handles demanding loads like twin Spal fans or staged fuel pump setups in high-boost applications. We spec these on serious builds — RB26 conversions, 2JZ swaps, boosted LS engines — where reliability isn't negotiable. The fast switching response also eliminates the lag and bounce you get with mechanical relays, crucial for precise fuel pump control during transient conditions. ECU & System Compatibility Compatible with all Haltech ECU families including Elite 550/750/1000/1500/2000/2500, Nexus R3/R5, and Platinum series units. Works with any low-current auxiliary output — perfect for ECU-controlled fuel pumps, cooling fans, or other high-current loads. Contact our technical team to discuss integration with your specific ECU configuration and wiring harness requirements. What's in the Box Haltech 100-amp solid state relay (HT-030202) Technical documentation and wiring guidance Complete Your Build Most customers implementing solid state switching also require proper fusing, quality terminals, and appropriate gauge wiring for their high-current circuits. Our technical team can recommend the complete electrical package for your specific application — from standalone engine swaps to full race car looms. With UK stock and expert pre-sales advice, we ensure you get the right components first time, properly matched to your ECU and power requirements.
