This part is a kind of semiconductor called BD034.

Function of this product has TRANSISTOR.

Manufacturers : Jiangsu Changjiang Electronics

Image and pinout :

Some of the text within the PDF file :

JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD TO-126 Plastic-Encapsulate Transistors BD034 TRANSISTOR (PNP) TO-126 FEATURES Power dissipation PCM: 1.25 W (Tamb=25℃) 1. EMITTER 2. COLLECTOR 3. BASE Collector current ICM: -2.5 A Collector-base voltage V(BR)CBO: -110 V Operating and storage junction temperature range TJ, Tstg: -55℃ to +150℃ ELECTRICAL CHARACTERISTICS (Tamb=25℃ Parameter Collector-base breakdown voltage Collector-emitter breakdown voltage Emitter-base breakdown voltage Collector cut-off current Emitter cut-off current Symbol V(BR)CBO V(BR)CEO V(BR)EBO ICBO IEBO hFE(1) DC current gain hFE(2) Collector-emitter saturation voltage Base-emitter voltage Transition frequency VCE(sat) VBE 123 unless Test otherwise conditions specified) MIN TYP [ ... ]

BD034 PDF Datasheet Download