GenssiCar 30A 12V SPST Micro Relay Kit for Electric Fan Fuel Pump Light Horn 4Pin (10 Pack)

I use these all the time at work and have had no problems with them except the wire is no a large enough guage for the advertised amp rating.

I tested these on my adjustable bench power supply, and they do really well.The listed pick up voltage is 7.8v, they exceed this slightly and pick up at 7.5v. Really nice.The drop out voltage is listed as 1.2v and they did not quite meet the spec and would drop out right at 3v. That is a little disappointing but for my purposes this is more than adequate.The coils consume right about 100mA at 12v and it drops slightly as the voltage goes down. This is not negligible, and if you're using these on a battery powered project there will be a slight impact to battery life. But considering the price, I was more than happy.I tested these with a dummy load at 40 amps. The relay continued to function and was only slightly warm, but the wiring became too hot to touch. At 30 amps the wiring became warm but not at a level that I would worry about as the wire is rated 70c. You could easily replace the wiring with something a higher gauge if needed and probably push this relay up to 50a before catastrophic failure.

Pro's:*Very affordable*bases interlock with dovetails side to side AND front to back leaving you with plenty of mounting options.*Base mount not relay mount. This allows you to remove the relay and the socket will stay in place.*Compact. Smaller than a bosch relay but maintains the amperage capacity.Con's:*2 different size spade terminals in the relay socket.Overall well worth the money. If you plan to remove the wiring and terminals and replace them with your own you might have a hard time finding the smaller ones. I was able to find them at a hole in the wall electronics reseller after searching high and low on the internet and around town. Still this was the best and CLEANEST install option I found out there without breaking the bank.

These work ok but you better do some research online. These do not have labeled terminals (should as 30, 87, 89 or any of the normal relay terminal numbers) and there was no istructions at all when they arrived as to what color wire is what number terminal. Also called manufacturer and they told me incorrectly how to hook them up.

I bought a bunch of these but only used a few so far. Worked as expected and seem well made.

These relays work great, I bought them to use for various vehicle projects I do including car alarm/keyless entry installs and remote start installs. Great working relay at a great price, especially for the relay and wiring harness together. I will definitely order some more of these when the time comes.

These are quality relays and I am using 2 on my motorcycle...one for a 20 amp air horn and one to supply power to a 30 amp accessory fuse block, so everything turns off with the key. If a relay does go south, it's a quick change out because of the relay socket....no unsoldering to do!

on, off, on, off. That's what they do. Work fine/LastLongTimeI've got this joke: 110 010 011...you know the rest.Switches you know how they are