DPST 1NO 1NC 8Amp Latching Relay Module (DC 12V)

i used this in a project to make my own smart outlet battery backup system that runs my 3d printers because consumer grade smart outlets are 100% junk. works great.

I just got done testing this guy and I was surprised to see no quiescent current. It requires 5V with 0.05 amps of current when you push the Set or Reset button or momentarily touch the Set or Reset signal wire to ground, but if you like the 5V connected it draws nothing, or at least less than 0.00 amps, which is the smallest significant digit I can read to on my PS and DMM. You can move the power source entirely and it will stay in the same state. In my application, I wish to leave the 5V connected all the time but not have it draw anything at all until a change is made, and 50mA of current for a brief moment is no big deal when a change is made. Exactly what I needed! While I'm not a fan of pigtail wires it's better than the cheap knock-off Phoenix block connectors any day. I can solder and heat shrink to it for a reliable connection!

It's hard to find true latching relays. I used the 12v version to convert my Casablanca Inteli-Touch fans to Wi-Fi smart home controls. I needed a latching relay that would latch to either the forward or reverse motor winding and NEVER both. It would have been great if this module included Wi-Fi and Tuya but I needed an MHcozy switch for that. The MHcozy switch does a one second inch to either the blue lead or green lead on the relay module to toggle and set the fan direction wirelessly. It works great and is especially awesome for my master bedroom fan that is 14 feet high and would otherwise require a ladder to physically switch the fan blade direction. This would be a 5-star review except that one of the four I purchased was bad. It worked on my workbench and then failed almost right away after the fan was mounted. it latched permanently to one of the leads. This forced me to pull the fan down after I had just finished hanging it. The others have worked flawlessly for almost six months now. My only other complaint is that the trigger wires are a very small gauge. That's fine for a 12v signal but too small to work with comfortably and makes it difficult to attach wire nuts securely. Just a minor complaint though.

Bench tested the unit with a 12v power supply. The set and reset relays would activate normally when the red buttons are pushed but not when voltage is applied to the set/rst lines. Very disapointed.

Works as described. No issues.

Had to add a resistor transistor circuit to reverse the incoming trigger since it needs a negative trigger and I needed to use +5V. No biggie! Works well.

Draws no current after initial set-reset pulse. Keeps state even after supply power is removed. Draws 50 MA during momentary positive pulse. Small compact size. Works great.

Product works. Don't know how long it will last kinda lightweight. Needed a little more instruction but once figured out worked as it should. Not weatherproof so mount accordingly. Will buy again .