This part is a kind of semiconductor called BA505.

Function of this product has DC / DC Converters.

Manufacturers : XPiQ

Image and pinout :

Some of the text within the PDF file :

w w a D . w S Sources, Inc. Power a t BA/BC Series: 1.5 - 6.0 Watts Single and Dual Outputs e e h International U 4 t m o .c DC/DC Converters 260 Hopping Brook Road Holliston, Massachusetts 01746 Tel. (508) 429-4440 Fax (800) 226-2100 http://www.intlpower.com FEATURES • Input π Filter • Fully Regulated Outputs • Industry Standard Pinouts • 5, 12, 24, 28, and 48 VDC Inputs • Ripple and Noise Less Than 50mVpp • Input/Output Isolation Ordering Guide: Series/Input Code/Output Code Example: BC302 - BC Series, 24 Volt Input, 12 Volt Output @ 0.47A Series BA BC Output 1.5 Watts 5-6 Watts w w .D w t a S a e h t e 1 2 3 4 5 U 4 .c m o Input Code Input Voltage BA/BC Series 5 V Nominal 12 V Nominal 24 V Nominal 28 V Nominal 48 V Nominal Output Code 01 02 03 04 0 [ ... ]

BA505 PDF Datasheet Download