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High-Current Solid-State Relay 35Ax4, Red

High-Current Solid-State Relay 35 Amp per channel up to 140 Amp continuous

Amp Rating
Part # 7564-HC
Estimated shipping date: 06/17/2021
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Clean up your wiring with an MSD Solid-State High Current Relay Block. This high current module takes the place of 4 standard relays and eliminates unsightly wiring. Four independent channels can be activated using either power or ground. Each channel is capable of handling up to 35 Amps of continuous current, providing up to 140 Amps of power. It also has the capability of Pulse Width Modulation (PWM). With a PWM input, you can control the output at a rate of 15 hertz and a duty cycle of 50-90%. Controls electric fans, water pumps, nitrous solenoids, auxiliary lighting and any other electrical accessories that would normally require a relay. LED status indicators ensure proper wiring and operation of each channel. Should a problem arise, the relay block has built-in automatic over-temp, short circuit, and overload protection, as well as a channel reset. The solid-state high current relay can easily be mounted using the supplied hardware and mounting tabs that can be rotated 90° to accommodate various mounting locations. It's compact and clean design will make your wiring project a breeze.


  • Operates from 7-Volts to 20-Volt supply
  • 4 Independent Channels, 35 Amps each continuous or 100 Amps for 8 seconds
  • Combined total continuous current rating of 140 amps
  • Channels can be run in parallel for devices requiring more than 35 Amp single-channel rating
  • Clean, easy install with minimum wiring
  • Over-temp, short circuit and overload protection
  • Diagnostic LED’s and status indicators
  • Multiple mounting options
  • Single wire activation by switching power or ground
  • Available in Red or Black
  • A PWM signal can be used in the Solid-State Relay Module with a maximum frequency of 150 hertz and a duty cycle range from 50% to 90%.

About MSD

From small block street cruisers to 10000 horsepower top fuel dragsters, MSD's ignition systems has been the industry leader for over 40 years. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems.

Amp Rating4 Channel - 35 Amps Each
Emission Code5
Product TypeSolid State Relay
WarrantyLimited 1 Year Warranty
Part Number7564-HC

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

*Amperage Max On Time
35 Continuous
40 3 + Hours
45 30 + Minutes
50 12 Minutes
60 35 Seconds
80 12 Seconds
100 8 Seconds
* Amperage rating is per channel *Recommended Wire Gauge: Main Input BATT + - 2 AWG Channel 1-4 Outputs - 8 AWG 12 Volt and Ground Activation Wires - 18-22 AWG
Limited 1 Year Warranty: See Details

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.