TWTADE/JQX-12F-2Z DC 24V Coil Voltage 30A DPDT 2NO+2NC General Purpose High Power Relay 8 Pin

Worked well on a under hood shunt system. The 30 amp rating was a step up from the factory 20 amp rating.

Has worked flawlessly over the past several months for an (up to) 30A automatic transfer switch. I needed buzz/hum free contactors in my RV power center to disconnect 120v W/H, refer & converter plus allow inverter backfeed when shore power was not present, but reconnect W/H, refer & converter plus disable/disconnect inverter when shore power was present (after a time delay, shore is allowed through). These being 12v coils they are silent but at the same time can switch a larger current. On routine inspection I see no signs of overheating, hot arcing or welding though the design will fail over to a de-energized state should this occur. I'm quite pleased.

Bought some 40A solid state relays from amazon thinking it would be more reliable and forward thinking. Wired it up, they locked on without any input voltage (like 20v shy of full power). This is a horrible way to fail (fail off maybe?). Should have trusted the reviews. So decided to just go mechanical relay. Oh look, it JUST works because you can't mess up decades old mechanical design. The description is accurate how to wire it up, but here's an image to clarify. Pins are typical 1/4" male faston so it's easy to add some female connectors to your wires.

Not real excited about it being Chinese but I needed it fast. The quality appears good. Really like the clear cover so it's obvious which terminals do what and you can observe the condition of the contacts.

I am switching a 1500 watt oil-filled electric space heater who's original thermostat died. This relay is controlled by an Inkbird Temp Control Thermostat ITC1000. You can hear the relay close and open and sometimes I hear the relay coil buzzing.

I needed this to start and stop my MMG55 backup generator during the power outage using preconfigured two wires switch! As the power goes out this relay closes and connects the two wires sending signal to the generator, when power comes back it opens the circuit and shuts off the generator, this was supposed to be built in the ATS but unfortunately my ATS doesn't even transfer back to main when the power comes back however it does now start the generator and transfer the power to the generator. Overall this relay has helped me from going to the garage and manually send the signal to the generator. The configuration listed in the description though doesn't work I used different configuration for my purpose.

Used to connect an inverter to a load while preventing any back feed.. I was unsure if this relay had a 100% duty cycle as it would be energized for hours at a time. Happy to find it would run for hours at a time with no overheating. Works well for me and would buy again!!

Bought this relay to control a 1500W heater connected to a G4 remote switch (controlled with text messages...very cool). The relays in that remote switch were 10A, and I was concerned I'd trip the relays if I put 1500W through them at 110V, so I bought this 30A relay to activate the heater circuit. Works like a charm. As others have noted, the clear casing allows you to easily determine the normally 'on' and normally 'off' switch contacts (1 each), as well as the input and output contacts. It doesn't come with instructions, but frankly, if you're buying this device, you must already have a working knowledge of circuits so the absence of instructions isn't really an issue. Would buy another if I needed to.