This part is a kind of semiconductor called B0505S-1W.

Function of this product has FIXED INPUT ISOLATED & UNREGULATED SINGLE OUTPUT MINIATURE SIP/DIP PACKAGE.

Manufacturers : MORNSUN

Image and pinout :

Some of the text within the PDF file :

B_S-1W & B_D-1W Series 1W, FIXED INPUT ISOLATED & UNREGULATED SINGLE OUTPUT MINIATURE SIP/DIP PACKAGE multi-country patent protection RoHS FEATURES ● Efficiency up to 80% ● Small Footprint ● Miniature SIP/DIP Package ● 1KVDC Isolation ● Temperature Range: -40°C ~ +85°C ● Internal SMD Construction ● Industry Standard Pinout ● No Heat sink Required ● No External Component Required ● PCB Mounting ● RoHS Compliance PRODUCT PROGRAM Input Part Number B0303S/D-1W B0305S/D-1W B0503S/D-1W B0505S/D-1W B0509S/D-1W B0512S/D-1W B0515S/D-1W B1203S/D-1W B1205S/D-1W 5 4.5-5.5 Voltage (VDC) Nominal 3.3 Range 2.97-3.63 Voltage (VDC) 3.3 5 3.3 5 9 12 15 3.3 5 12 10.8-13.2 9 12 15 5 24 21.6-26.4 9 12 15 Output Current (mA) Max. 303 200 303 200 111 83 67 303 200 111 83 67 200 111 83 67 [ ... ]

B0505S-1W PDF Datasheet Download