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Your cart is empty.Feature: High reliability,high efficiency and long lifespan. No electric spark,no noise and no contact. Fine electro magnetic interference,high sensitivity and fast switching speed. Low drive voltage and current. Unique shape and novel structure. Especially suitable for corrosion, moisture,dust resistant and other harsh environments. Widely used in many automatic control systems. Specifications: This is solid state relay SSR-40VA. Model: SSR-40VA Input Resistance/Power:500Kohm/2W Output voltage: 24-380V AC Output current: 40A Control Mode:External Controlling Potentiometer Insulation
Ben K.
2025-09-04 17:13:04
Got the job done!
Donny
2025-08-28 13:45:49
It was well made. And well represented in the ad. My only complaint would be that they do not supply wiring instructions with it.
DAC
2025-08-03 11:18:54
I’m using it to control a 240 volt, 3500 watt water heater element in a homemade still and it seems to be working perfectly. I have a computer type fan installed in the project box to cool the heat sink but I suspect having a fan is overkill especially if mounted in the open air. My go-to controller for the still is a PID controlled circuit but this is a very inexpensive, easy and intuitive controller when manual control meets your need.
jeffrey w pugh
2025-07-26 11:12:40
Dead east to wire up and use. Just use a heatsink if you can. They can get warm. Had led 01 status.
HVAC Dad
2025-07-13 11:20:53
Well packaged and works flawlessly. I have used this several times and have had no issues.
T.H.
2025-05-18 18:10:54
The 1st time, I put the multi-meter on the potentiometer and it failed AND the SSR smelled like burnt electronics.I got the 2nd one in the mail a week later, the potentiometer tested good so I hooked it up. Nothing happened over and over when I would turn the power on. I read that, someone else had problems and saw it needed more than the 120v, 1amp light I was testing it with so I added a 120v, 3amp soldering iron. Turned the power on to it and nothing for a long time, then the light came on and iron started warming up, then the SSR started smoking and crackling. After turning everything off, I double checked all wires, connections, etc and everything was right so I tried again, nothing happened. It worked to some degree once, just like others on here have said, then total failure.
W. F.
2025-05-09 10:13:54
Works great at controlling the power to the heating element for my homebrew boil kettle. Essential for preventing scorched wort and excessive boil off. The knock on it is that it came with no directions. I had to search the web to figure out how to wire it.
Ben
2025-05-05 10:31:40
I build coffee roasters as a hobby. While a pid loop controller and a standard SSR can give a certain amount of control, I really would rather vary the voltage to my heating elements. Granted, a dimmer switch, or router control unit can work on lower amperage hearing elements. But in my experience, these get way too hot and won't last very long. The solution is this Variable Solid State Relay! This thing is AMAZING! I can roast all day, dial in my heating elements, and none of my controls overheat. As a bonus, the accuracy far exceeds anything I've used so far. I highly recommend it for all kinds of heating element or motor applications.
Customer
2025-04-05 15:21:44
All good
Cat Sassman
2025-03-22 13:21:53
I bought this expecting to be able to vary the voltage output by adjusting the pot. It seems like it does perform a PWM like function, however it goes through from 0-100% output in only 1/4 turn or less on the potentiometer. Doing a bit of research and checking data sheets on similar products seems to indicate that 500K pot works for 220v and that a 250k pot might work better for 110v. I may source a 250k pot and try it again, but as is this kit did not function as I expected and the ad did not indicate that it wont work on 110v.
Lee
2025-02-05 16:01:39
Not much to say,it’s industry standard.
Randall Quinn
2024-11-25 12:56:42
Works
Karl S
2024-11-24 14:11:13
Works as describe
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