ESUPPORT Car Relay 12V 40A SPST 4Pin Switch Socket Plug Wire Harness Automotive Pack of 5

I installed these in my pickup for the headlights and daytime running lights a couple months ago. They work great with no issues. The deal was I kept leaving my lights on by accident, so now that I rewired them to include these relays they shut off when I turn the key off. Everything is sort great now!

The order for the 5 micro Relay and Sockets arrived quickly. Each relay contact is most likely able to handle its rated amperage. The socket wiring will not. The listing says ‘waterproof’. The relay appears to be sealed but this socket is not waterproof. I will be sealing the socket wiring with silicone. Note that the current rating is different for the N.O. N.C. terminals. Relay terminal 87 (N.O.) is a maximum of 30 amp. The (N.C.) Relay terminal 87a is rated at 20 amp. But connected with this socket wiring this relay should never be exposed to any current higher than 9 amp. The wiring to the socket terminals 30 and 87 is 18 ga and rated at 9 amp on a maximum length wire of 1 meter. The wiring to the other three terminals 85, 86, & 87a is only 20ga and max current on a 1 meter long wire is 7 amp. These wire sizes were measured with a certified wire gauge. I have a diagram attached that shows the color of each wire to each terminal. I had the relay wiring in my training materials I used in my basic electric course for Cat mechanics. I added a few notes, on a screen grab, specifically related to this set of relay and sockets. You might notice the red and yellow wires a not connected as stated in the listing. I hope this information will be helpful.

The entire description of this SPDT relay states 30A HOWEVER the device shows 30/20A and there is NO explanation at to what that means. I thought I was getting a relay that could handle 30A on both contacts but evidently something can handle only 20A. WHICH contact handles only 20? Likely will return because of the misleading description.

Great set of relays for use in low or no moisture areas. This are smaller than standard Bosch relays which make them very useful in under dash applications where space isn’t available.I used these for some switching logic on a custom CJ-7 head, parking, and fog lamp controls.

I used these to install 30amp electric radiator fans on my 68 galaxie drag racing project. I have one relay for each and they work exactly as they should. I was worried about them being open in the engine compartment (to the weather) but so far so good, and I've driven the car in the rain once or twice. Ive had them on the car for a few months now and they are still working appropriately. I dont know about extreme temperatures as I live in Socal, but they worked at Tuscon Dragway in 100°+ weather for what its worth.

Came complete with Relays & Wired Harness. Easy understanding installation and wiring

Los pines no concuerdan con la descripción y para colmo describen mal el producto en cuanto a los colores de los cable que van a cada pin

Worth the value. I paid $25.00 for 1 at auto zone.