CATIYA 12V 300W LED Driver Transformer, IP67 Waterproof Constant Voltage Power Supply for Low Voltage LED Lighting

Bought this to power my LED under cabinet strip light project. I was estimating right at 60W of power at12V but wanted some margin so the power supply would not strain itself and/or run hot in a confined non-ventilated space with my 25 foot wiring runs to 2 of the 3 areas in the kitchen. In general, I would suggest NOT operating any of these type supplies (from any supplier) at more than 80% of their rated capacity, regardless of their safety certification status. Even then, monitor their performance after installation over a few hours.What attracted me to this supply was what looked like a well built extruded outer casing with screw mounting features, AC input with standard U.S. 3 prong plug, and a heavy gauge output pigtail. The outdoor rating was not important to me, but a nice extra given that I was mounting behind a refrigerator with a water line hookup below it. This unit was a few dollars more than some others I was looking at, but those generally did not include the input connector which made up the difference. In my application the case size (height in particular) was also right in the range I wanted it to be. Right out of the box, the unit is impressive in its compact and robust appearance. These "waterproof" outdoor supplies are generally low cost standard switching power supplies that have been pumped full of (thermally conductive?) sealant and this is the same in that respect. You'll see some of that material has filled some of the space in between the case fins around the end plates as it overflowed when they first filled it, but otherwise this unit is very clean and appears solidly built. The casing is an attractive darker gray plating that looks good in case you are going to have this exposed somewhere. All basic specs with connection info are legibly and conveniently etched right into the top. Basically, it looks good and was all if not more than expected.Operation: For a quick test, I connected the DC output wires directly into a 1 meter strip of 5050 sized LEDs and then plugged the unit into a 110VAC wall outlet. It took a few seconds for the internal capacitors in the supply to charge up and then the strip lit up. I did note a slight hum from the supply before I disconnected the LED strip but that was likely due to the power supply not having enough load, about 14% on this first test, to regulate properly. I then connected the supply to a longer run of LEDs giving it more load to work against (about 50W) and this time the supply started up after a shorter delay and there was no hum. Having verified that the supply worked OK and was putting out a nominal 12VDC, I connected the output wires to my LED PWM dimmer/controller and plugged the supply back in. Over about 18 hours with the controller operating 60W worth of LED strips for hours each at 0%, 40% &100%, I have had no issues / no noise / etc. The power supply case is basically neutral or slightly cool to the touch in feel anywhere I touch it, so I haven't bothered to measure actual temperature. SInce the power supply is "on" regardless of my dimmer setting now, there is no delay other than what is normally in my "smart home" network even when I try the manual switch feature on my particular LED controller. If you are powering down the supply from its input side in your application, then there will likely be a short delay when powering back up due to the protective circuits in the design. YMMV in that case.Bottom line: This seems to be a good power supply for the money that should provide years of service when installed and operated correctly.

The power supply works good but it gives off pretty bad electromagnetic interference at 60 Hz. It also produces a pretty noisy 12 volt signal so wouldn'y be good to use for audio equipment. I used this to power bicolor LED's for home studio lighting and the electromagnetic interference is being picked up by my microphone cable and now the audio from my mic has a 60 hz hum. If your not using yours near something that is susceptible to EMI then it should be fine. If you want one that works without the EMI you'll have to buy a linear 12v power supply instead of a switching one like this. They do have linear 12v power supplies on Amazon that will work at the same price. They are listed as being for audio or lab use but work great. They are quite a bit bigger unfortunately and are less efficient so they do use more electricity and produce more heat.

I purchased this to power the LED lighting in my cargo trailer. The trailer has two LED strip lights inside, that only have power when the vehicle is connected, and the parking/headlights are on. I connected a 4 pin plug to this power supply, and plug it into the harness on the front of the trailer. The clearance and taillights come on, but that doesn’t bother me. My main concern was having lighting inside the trailer, without having to have my truck connected to the trailer. It works perfectly. I’m not sure how well the power supply would actually hold up against rain, so I have it protected from the elements.

This Power Supply is DANGEROUSWhile testing this power supply, I clipped my meter to the DC Plus & Minus. I was holding the DC Plus clip with one hand and the DC Minus clip with the other.When I released the DC minus and my hand brushed against the power supply case and I received a SHOCK, I was still holding the DC Plus clip.... Until the shock and I dropped everything.This felt like an AC Power shock. This should NEVER happen.I have been working with electric for a long time and I have never had a DC power supply cause a shock.The DC current did not cause a shock because I was holding both the Plus & Minus with no issues.I unplugged it and started testing. The case is wired to the Ground Prong on the plug, as it should be.I didn't pick up and continuity from the DC contacts to the plug. When Powered up, there is voltage from the DC Plus lead to the case. My meter fluctuated from negative voltage to Over Limit. The meter is fine because it did this with two meters.So far the seller HAS NOT responded.

Well I got this to replace a 35 watt Westighouse light transformer that finally went bad after 4 years for my LED landscape lights with about 25 watts needed. I got this one since it was double the wattage I required at 60 watts.Well I installed this one and about half the lights are flickering and dimming. I figured it was my wiring so this weekend I was going to yank all the cable and lights out and redo it. But tonight before all the heavy work tomorrow I decided to try one of my other Westinghouse transformers. And wow it worked no more flickering. Not happy at all with this transformer and all the aggravation it caused me.The other thing I do not like is you have to use butt connectors as it does not have screws and terminals.

Quality high technology manufacturing at a low price ($25). Heavy duty AC line cord. Runs cool at 6 Amp loading. I added a 7 Amp in line fuse to feed a dozen LED landscape lights. I bought two of these and would buy more if they continue to operate in outside bad weather conditions. A rain protection hood is easily provided. I used 16 AWG 2 wire cable to connect the lights to the power supply.