CAT# PS-2545
$29.95 each
10 or more $27.95 each
Astec #DS550-3.
Sun PN: 300-1757.
550W network power supply. Designed as a hot-pluggable supply, but can be used as a stand-alone with a little modification (see diagram on spec sheet). Overall dimensions, 13.29" x 3.07" x 1.52". IEC input receptacle (90-264Vac). UL/ cUL, CE. Power cord not included.

Input: 100-240 V, 8A max, 50/60 Hz
Output: 12V / 45A, 3.3Vsb / 3.1A

Other features:
1U x 2U form Factor
Active Power Factor Correction
N + 1 Redundant
LED status lights
High-velocity cooling fan, 40mm x 28mm.
Internal Fan Speed Control
Fan Fail Tach Output signal
Spec sheet available in PDF format.
Average Customer Review:  (7 Reviews) Write A Review

Customer Comments

Average Customer Review:  (7 Reviews) Write A Review

A customer from BROOKFIELD, CT USA
High quality power supply
Very high quality unit at great price.
Have not found the logic combination to
activate the 3.3 volt output.

Jan Steinman from Salt Spring Island, BC, Canada
DC input?
If this is a typical switcher, where the first thing the line voltage hits is a bridge rectifier, then it should be able to work on DC, no?

If so, this would make an awesome 12 VDC supply for an electric vehicle conversion. My traction pack is 144 VDC (24 each 180AH 6V flooded-cell NiCd batteries), and I need something to power headlights, horn, stereo, etc. from.

People pay upwards of a thousand dollars for specialty 12V power converters.

But also, it would need to be hacked to produce 13.8 VDC, as you typically put a small lead-acid in so you can have the stereo on without engaging the traction pack.

Anyone been able to boost the 12VDC a bit?

Anyone verify that these will probably run on 144 VDC?

A customer from DENVER, CO USA
Running 4 of These in Parallel Using Active Load Sharing
I ordered 4 of these to power my quad-copter test bench (can’t beat this price). I'm running them in parallel for 180A @ 12VDC total using the Active Load Sharing capability. No need for big Schottky rectifiers. I figured Dr. Google could tell me how to do this, but I couldn’t find anything on how to connect the “12V CURRENT SHARE” pin (A2). Experimentation was the answer. Let me save you some time...

1) All common GND connections! AC GND = "12V RETURN" = "LOGIC RETURN"
2) Connecting "PS_KILL" pin (A1) to GND enables the 3.3V output. The 12V output won't work unless this is enabled.
3) Connecting "PSON" pin (B6) to GND enables the 12V output.
4) The fan is always on when AC power is present. Disabling the 12V and 3.3V outputs does not shut off the fan.
5) Active Load Sharing for 2+ PSUs in parallel is simple. Connect all the “12V CURRENT SHARE” pins (A2) together. This forces each of them to produce the same amount of current.
6) ¼” Male Quick Connect terminals work well for the 12V output connections. They can wiggle loose gradually, so I used hot glue to hold them in place.
7) I recommend using 208-240 VAC when running multiple PSUs. I used CAT# LCAC-433 because they have removable plugs, easy to replace with 240 V plugs.

A customer from Richland, WA USA
Logic Connections
The tech specs say the A1 and B6 logic pins should be "grounded" for standalone operation. Can I assume this means to connect them to any of the "Logic Return" pins? (A3,C3,B3, etc) Also can I assume the "12V Return" pins are electrically isolated from the Logic Returns?

I intend to use these as power supply for some benchtop power tools I am converting to 12VDC with variable speed control.

A customer from CHANDLER, AZ USA
High Quality PS, but Loud
This appears to be a high quality server PS. It was easy to jumper the pins to power on. The small fan in the power supply blows a lot of air and is very loud. One thing I was curious about was if there were separate 12V power domains, but looking at the circuit board, it is clear that all 12V pins are electrically connected. If you didn't want to try to connect wires to the connector on the back, it looks like it would be very easy to solder wires onto the PCB where the connector is soldered on without any disassembly.