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Your cart is empty.Four 40 Amp Relays. MSD relay modules are designed to be easily installed in most automotive electrical systems where a high amperage relay is needed. These relay modules are perfect use with high amperage electric fuel pumps and high CFM electric cooling fans. Each relay comes with a 40amp fuse, however lower amp fuses can be installed if required. The relay housing comes with a labeled lid that snaps into place providing a clean installation, and protecting the main power stud and triggers from contamination or accidental contact.
The Gardener
Reviewed in the United States on March 2, 2025
Nice solid feel even though its plastic. Screw terminals and power lugs help in making a clean looking install when you have multiple circuits to control. Fuse is easily accessible but is limited to 20A to 40A in size. I was surprised the relays are potted in plastic and are not replaceable, but I hope they are reliable enough that they won't need to be serviced. The LED circuit indicators let you know what's being operated at a glance. This was also a little larger than I anticipated but that did make it easier to sort out the wire connections.
Marc
Reviewed in Canada on November 29, 2024
Nice well built heavy duty 4 bank relay block. It’s heavy and solidify built. I like the cover and the LED light indicators. Nice unit MSD. A little pricey but once I had it in hand I could see it’s worth it.
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