This is out of a 600 watt computer power supply (CoolMax ZX600) and I don't know how to identify it without markings or a schematic and hoping someone can help. The PCB spot for this is labeled BD1 and the main transformer is a ERL-39 (17RL3927). I've looked on the sides and the back and no markings except the "Sep" and "H1" on the front as shown in image. Thanks in advance for any help at all, trying to replace. Need to add that this does show AC on the PCB for two inner pins.
Also the dimensions are Width = 22mm Height = 18.5mm Thickness = 3.2 - 3.3mm