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Tags PSU, Shuttle, Tip
Its a Delta Electronics SADP-220DB B
A similar delta model is here on their web site
It appears to be the same/similar to one sold by Delta for CISCO kit as here in this auction selling them in the USA.
Excerpt here:-
Original Cisco Adapter by Delta Electronics
Model: EADP-220AB B P/N: 341-0222-01
Input: 100-240V Output: 12V (18A) 220W
compatible to DELL Optiplex SX280 GX620 USFF adapter other Compatible P/N MK394 Y2515 M8811 Y2515 D3860 D220P-01, ADP-220AB B ZVC220HD12S1
It occasionally comes up on Ebay, and may be able to get a compatible one elsewhere – shuttle don’t seem to be of help, tried before.
A picture of the PSU is here on Silent PC Review in their review of the SD11G5.