Ignitions and Electrical› Ignition Components

MSD

High-Current Solid-State Relay 35Ax4, Black High-Current Solid-State Relay 35 Amp Per Channel Up To 140 Amp Continuous MSD Ignition

$398.09

SKU: M00T 75643-HC

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The MSD 75643-HC is a high-current solid-state relay. It features four independent channels, each capable of handling 35 amps of continuous current, for a combined total of 140 amps. The relay can be activated by switching power or ground and operates within a voltage range of 7-20V.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMSD
Part NumberM00T 75643-HC

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy