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 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 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.

A customer from NOVI, MI USA
Sun X4100/X4200 AC PSUs
These are actually for Sun X4100 and X4200 servers and at a great price.

A customer from CLEVELAND, OH USA
I wish I had known how loud this was before ordering. The specs say "Internal Fan Speed Control" but it is one speed....super fast and super loud. High quality if you put it in a separate room.

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.