MSD’S AWARD-WINNING SOLID-STATE RELAY BLOCKS SIMPLIFY ANY WIRING JOB, ELIMINATING TANGLED MESSES AND CLEANING UP THE ENGINE COMPARTMENT AND FIREWALL OF ANY HIGH-PERFORMANCE VEHICLE. “It’s the solution for so many wiring problems because it’s compact, it’s safe, and it’s so convenient,” said MSD Product Manager Phil Chacon. “It really cleans up everything under the hood.”
The innovative new solid-state relay blocks actually do the job of four separate relays. Four independent channels can be activated using either power or ground, and each is capable of handling up to 20 amps of continuous current for 80 amps of total power control. It's perfect for electric fans, water pumps, nitrous solenoids, auxiliary lighting and any electrical accessory that requires a relay. The possibilities are virtually limitless, and it doesn't require an electrical mastermind to install and set up. The average car guy can be up and running in no time.
“Race cars, hot rods, muscle cars, everyday street cars—this relay module can be used on just about anything,” Chacon said. More and more drag racers are using it to control nitrous solenoids and not just for single-stage systems. “For dual-stage nitrous cars where each stage of nitrous pulls, let's say, 50 amps, you could combine two channels, and it can easily handle that for short bursts,” he said. “The unit can handle PWN [Pulse-Width Modulation] inputs as well if you're running a progressive nitrous controller. And if you're activating a component that draws 20 amps, but the inrush current is higher when it's first turned on, it can handle that too.”
On the drag strip, tire-shake does more than blur a driver's vision and shake the car apart. It can also create electronic headaches because electrical mechanical relays rely on an internal switch. “Relay chatter—when something essentially keeps turning on and back off and then back on—can be a real problem,” Chacon said. “This thing completely gets rid of that because it has no moving internal parts. It's on all the time.”
Before their recent release, MSD solid-state relay blocks underwent development and testing for a full year to work out all of the bugs. Only there weren't any bugs. “One of our engineers put it on his everyday driver and drove for a year and never had a single problem with it. Now, we're having a hard time keeping them on the shelf.” The red version came out first, but the black version that followed a couple of months later has almost caught up to it in sales and popularity.
MSD solid-state relay blocks can be activated by either power or ground supplies and feature builtin automatic over-temp, short-circuit and overload protection. Two diagnostic LEDs on each channel immediately let you know if there's a problem and exactly where it is. Instead of spending hours tracking down an issue, now you can just check the LEDs: If they're green, the channel is powered up and running correctly; if there's a fault and the channel shuts itself down, the LEDs turn red. “You're not dealing with multiple wires like on a relay,” Chacon said. “What you have is an input and an output, so if you have a problem with something, you just need to follow whatever that channel goes to. You're also getting circuit protection—a circuit breaker, really—and if there's ever a problem with any of the channels, you just reset it once the problem is fixed.”
The benefits of this innovative component haven't escaped the notice of today's industry leaders. At the SEMA Show last year, MSD's solid-state relay blocks won the Best New Powersports Product award. “For what you're getting and the price you're getting it for,” Chacon said, “you really can't beat it.”
Available in red and now in black,
MSD’s award-winning solid-state relay blocks take the place of four standard relays with four independent channels, each capable of handling up to 20 amps of continuous current.
The compact, efficient module is perfect for controlling any electrical accessory that normally requires a relay: fans, water pumps, auxiliary lighting and especially nitrous solenoids.