DC-DC 25A

A great relay that won't get stuck on or off, no noise, no moving parts. Just a well built relay that does exactly what you want it to do without having to worry about mechanical parts wearing out or failing due to carbon buildup.

Great quality for the price

I bought one of these a few weeks back and it works fine for spindle control. I decided to add a laser to the CNC I'm building so I ordered another SSR for controlling it. The second unit I received arrived with two stripped out screws on the wire terminals, scratches all over the terminal cover and notations in black sharpie written on the face of the SSR. The notations were wrong so whoever previously owned it most likely burnt it up, I didn't feel like testing it to find out. Return started. I paid full price for a new unit, I should have received a new unit. Edit 3/9/23: The replacement I received after requesting a return and replace of the previously used SSR I'd been shipped the first time has also been previously used, box arrived with a crimped lid, no thermal grease packets inside the box (supposed to have two) but that's because thermal grease had previously been applied to the SSR, all the screws showed signs of use. I was literally sent a second used item after having complained about receiving a used item the first time around. Stay away.

I have been needing these for a long time and didn't even know it. Mechanical relays fail pretty quick in some applications and have other issues. This works perfectly with a control voltage of greater than 3 volts and is dead silent. No moving parts. The back is an awesome heat sink. Easy to mount and hook up. Love these things just ordered more.

Why did you pick this product vs others?: Best ones I’ve ever bought. Can be used for just about anything u want to switch on and off.

I have one of this brand solid state relays running my pickups electric fan at 12v with 250 hz pwm. Works great for this purpose and you can even get heat sinks for them. It's been on the truck over a year now and ~ 9000 miles, mostly in the heat.

I've killed a couple accidentally because the output is one direction so if you feed in from the wrong direction for too long you kill it. Either toss in a slip of paper or label it better then these would be 5 star all day every day. And they get HOT so scrounge up some old computer heatsinks and JB Weld them on with a thin layer so you get heat transfer.

I needed to control a solar-powered well pump with a float switch. Could not find a float switch which would handle 5 amps at 140 volts DC. The controller that the pump manufacturer sells costs several hundred dollars. With this SSR, I just needed a small float switch and a tiny 5v solar panel to provide a few milliamps for control power. I bolted the SSR to the back of a metal enclosure using the supplied heat sink grease. So the enclosure serves as the heat sink. It doesn't get warm. Instructions are sparse, so I don't know if the control power has to be isolated from the load. Could have built a voltage divider with resistors to get control voltage from the main panels, but using the tiny panel ensures that the two sides of the SSR are isolated. Very easy to hook up. It's been in service for about a week. I'll update if anything changes.