DC to DC High Efficiency Voltage Converter 24V to 12V 40A 480W Buck Converter DIY Power Supply Step-Down Transformer

This is intended to support a small PC that draws ~2A@11.5-12.5 VDC. The input is sitting on a large DC battery system that operates 10.5-14.5 VDC, 14.0 V nominally (10.5 V is the low-voltage cutoff).Computer only operates between 11.5-12.5 VDC.Connected the input to a variable voltage supply, and placed an 8-ohm power resistor on the output.13.9 VDC/1.2A input provided 11.98 VDC / 1.5A out (92% efficient at this output current)The minimum input voltage before it gets unstable (starts and stops, oscillates) is 8.6 VDC.Ran input to 25 V and output stayed at 11.98 V.Open-circuit current (9-25 VDC input) was 25 mA.Under load above, using a voltmeter on millivolt scale, no measurable noise was measured on output or generated on the input using a Fluke multimeter. I looked at input and output on my 100 MHz scope and noise was essentially zero at this load. I don't quite believe the inducted noise is that low...but maybe so. I have not checked radiated (RF) noise. So given its screw terminals, mounting and presumed heat sinking, this should work great for my application. I just need to run it under constant load for a few days to see if it is OK as it will run 24/7. Unit is potted. Wish I knew what the NC terminal did - I was hoping it would disable the unit to eliminate the idle current and turn off output.Update: I also checked whether the negative input could be shunted to the negative output - as the equipment powered by this will effectively experience this condition through its equipment chassis, etc. This works fine an does not effect the device performance. What I did not check is whether the chassis of the DC-DC is isolated and/or floating. I am floating it by the way I mounted it (commercial velcro - yea, cheesy, but no other way). Works great.Finally, the conducted noise on this device at 1A remains undetectable on the audio and radio equipment it powers.

Works as described. Holds output voltage exactly constant at 12.1 volts through varying input voltages and output loads. Appears to generate low transient noise.

I use this to get steady voltage out of a small solar system as the batteries charge and discharge. It works great. I run it at about 2/3 of rated current and no problems so far. Output regulation is solid 12v from 9.5-15v input.It appears well made with a generous heat sink. I run it under a cover outside and no problems in hot and cold temps so far.If you need a steady 12v from a variable voltage input, this is what you should buy.I use it to provide steady 12v to a shed and driveway light system

It is used to take power from a battery bank and supply constant 12 volts to various electronic equipment. Battery bank voltage varies from 13 vdc to 11.5 vdc but output remains at 12.05 vdc

I needed a voltage regulator for a project to power 12V around 1.5-2A. I tried several in the 3-5A range that output too high around 12.7V or stopped working when the input voltage dropped below 12.5V. Both would happen on my project. I found this one a tried it out. It outputs 10A at 12.01V no problem tested at input 11.9-14.2 volts for over an hour. It's larger than I needed, but what I could find that actually worked. I also needed the low profile. The only disappointment is the NC labeled terminal. It appears to have no function, but may be a shutoff circuit that isn't used. The seller is rather vague on that point. Which may be a language barrier issue. When operating at rated capacity (most Chinese electronics have big problems with that) I did not see any major hot spots with my thermal imager. I don't think the FETs, diodes, or other control circuitry are connected to the aluminum body as a heat sink. The internal board is not potted and not water resistant. I coated the terminal openings with liquid PVC to keep out dust and dirt.Overall, I am satisfied with its performance. It works fine at about 1.25-1.5A output and give a steady 12.01V. I'm not sure how robust (or included) the reverse polarity, overvoltage, short circuit, etc protection provided. I don't really want to test it rigorously since I paid for it and don't want to destroy it.

I bought this to drive some electronics in my car that were sensitive to voltage stability, it was easy to set up and is working well.

I used this unit in my golf cart for accessories, works well.

Electrically, the converter works properly. Albeit it allows a continuous 12A output without the OC protection kicking in.Physically the design sucks. I wish I had noticed the review where it was mentioned its potted. In fact its not just potted. Its partially potted. So its neither serviceable nor waterproof. Worst of both worlds. There’s even a plastic shield over the inductor to keep the coil from shorting on the lid. Not great. If the mfg wanted to prevent damage from shock and vibration they could have just glued down the large passives instead.