This part is a kind of semiconductor called BP2832.
Function of this product has High Isolation Voltage DC Input Response Type SSOP Photo Coupler.
Manufacturers : BETEC
Image and pinout :
Some of the text within the PDF file :
BETEC BP2832 BP2832EB High Isolation Voltage DC Input Response Type SSOP Photo Coupler Features: Application： 1. High current transfer ratio (CTR=2000%TYP.@ IF=1 mA, VCE=2V ). 2. Small and thin package(4pin SOP, Pin pitch 1.27mm). 3. High isolation voltage between input and output ( Viso：3750Vrms ). 4. High collector to emitter voltage (VCEO=300V). 1. Hybrid substrates that require high density mounting. 2. FAX. 3. Communications ,Telephone ,Telegraph Receiver ,etc. Internal Connection Diagram： Top View 1. Anode 2. Cathode 3. Emitter 4. Collector Outline Dimensions： (Unit : mm) □BP2832EB Classification table of current transfer ratio is shown below. Ta=25℃ Model No. CTR Rank CTR ( % ) BP2832EB E Rank 400~9000 Notes: NO.01P25002 REV:1 TOLERA [ ... ]