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12 VDC 45A, 3.3 VDC 3A POWER SUPPLY

CAT # PS-2545 (7 Reviews) Write a Review

$29.95 each
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Product Description
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.
Customer Reviews (7 Reviews)

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Running 4 of These in Parallel Using Active Load Sharing

Reviewer: from DENVER, CO USA

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.

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Logic Connections

Reviewer: from Richland, WA USA

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.

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High Quality PS, but Loud

Reviewer: from CHANDLER, AZ USA

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.

1 of 1 people found this review helpful. Do you? Yes No  Certified buyer

Sun X4100/X4200 AC PSUs

Reviewer: from NOVI, MI USA

These are actually for Sun X4100 and X4200 servers and at a great price.

1 of 1 people found this review helpful. Do you? Yes No

WOW LOUD!

Reviewer: 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.

1 of 1 people found this review helpful. Do you? Yes No  Certified buyer
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