Citation de "tpb211"

I am wondering if the PA2 Ultra can sustain a continuous 2.56amps, 30.72 watt load. In addition to being able to vary voltage to decrease fan RPM's. My main concern is the PA2 overheating and longevity of the component as these aren't exactly cheap.

They are rated for 48W (4A) startup and 25W (2A) continuous so I think your asking for a bit much!
I needed a ram fan to cool mine with a 1.8A load from fans. When the fan speed is lowered they would overheat after about 2-3mins without the additional cooling from the ram fan.
Can you split the load maybe?

Citation de "tpb211"

I will figure out a way to split the load. Were you able to control the heat issue at 1.8amps? I would like to reduce fan speed up to 50% for majority of the time with a similiar load, really wish there was a water block for the pa2's. I may have to get creative and find a block that will work

Yeah Ive been looking at blocks to use for the PA2 too. I was going to mod a spare RAMPLEX block with RAM heat plates and see if I could get it to fit across 3x PA2 transistors mounted directly to the ram plates. (while on their 5 1/4 bay mounting plate) The RAM fan is the noisiest component in my system!
To do a single PA2 you could maybe try an A5 controller water block with a custom plate (like the RAMPLEX ram plates) to mount directly to the transistor.

When I have some more time I'll be looking into this further. I could possibly use one ramplex block to cool 6 PA2;s..
The other option is to unsolder the transistor, turn it 90 degrees extend its legs and mount it to a block thats secured to the PCB somehow with stand offs.


The PA2 will have heat issues with 1.8A when you reduce the fan speed unless you have really good ventilation or a fan as I have. (or the water block idea!)