This part is a kind of semiconductor called STR5707.

Function of this product has STR5707.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

24.2 ±0.2 15.5 ±0.2 3.0 T M REF 3.3 ø ±0.2 5.5 ±0.2 23.0 ±0.3 18.0 ±0.2 COLECTOR EMISOR BASE DFF2N60 STR 5707 3.3 ±0.1 0.85 +0.2 –0.1 1 0.4 7.0 ±0.4 9 2.54 ±0.1 0.65 +0.2 –0.1 5.5 4.5 ±0.7 PACKAGE CENTER LEAD CENTER Dwg. MK-003-9 mm COLLECTOR 1 COMMON 2 BASE 3 SINK 4 5 PROTECTION INHIBIT 6 32 V SENSE 7 DRIVE 8 V IN 9 + + DRIVE OSC. FAULT S FAULT LATCH R + REF. UVLO P [ ... ]

STR5707 PDF Datasheet Download