4000W Motor Speed Controller, Motor Control Board AC 110V Adjustable Voltage Regulator SCR High Power Dimmer Controller Temperature Governor Dimming Monitor

Easy to install

Bought and rebought this item. First one worked great. The second one looked exactly like the first but for a different color of peel off protective plastic wrap. But,,, the inputs and outputs were reversed! I didn't catch that and burned out a motor. I won't make that mistake again.

Did not work. Do not recommend

Had to return this it didn't fit my needs.

Works well but, construction is excellent. CAN NOT be used vinyl record turntable rpm control though which was my main reason to purchase but will use for other projects

DATE ORDERED: 02/06/24 DATE RECEIVED: 02/14/24 DATE OF REVIEW: 03/10/24 PERSONAL BUY/PRODUCT TO REVIEW: Personal Buy DELIVERY: UPS - Well packaged with additional items QUALITY: Well, it 'looked' pretty good. But it died on the first day. INTENDED PURPOSE: The plan was to use this device to control 2 small heater strips. Total load 15 Amps (7.5 amps each) on a 120V circuit. Total wattage of 1800W (900 watts each) on a 4000W advertised product. It should have been able to handle this load with no problem based on the ratings advertised. RECOMMENDATION: On the first test, the switched worked. On the second test, it did not. This was a purely resistive load. Not an induction load. I started with the switch in the low position and slowly ratcheted upward to full. Like I said, it worked the first time. I thought I would be pleased. The second time, it locked into the high setting only. I should have expected this. Junk from China. I'd ask for a refund or replacement but that would be like pulling teeth with with a fork. Lesson learned. I rate this product as a DO NOT BUY!

I've been working with scrs and triacs since the 1970s. I know how to use them. I wired this up carefully, paying attention to the warning that the inputs and outputs could be reversed from left to right. I connected it to a motor with a maximum load of 1,400 Watts. However it's never been my intention to run it at full power. At reaching the minimum control activation, the fuse blew like a Fourth of July fountain. I also have some variac type variable transformers rating at less than a thousand watts that do a perfect job of controlling this motor and do not overheat. I'm going back to using them. Old technology is sometimes the best. The refund did not require a return so I opened it up. First off, the fuse did not protect the Triac. It's toast. Second, the circuit seems unnecessarily complex for a basic motor controller. Regardless, it was beyond repair, and not valued enough by the vendor to require a return.

Constantly blows fuses