This part is a kind of semiconductor called B1453.
Function of this product has 2SB1453.
Manufacturers : NEC
Image and pinout :

Some of the text within the PDF file :
DATA SHEET SILICON TRANSISTOR 2SB1453 PNP SILICON EPITAXIAL POWER TRANSISTOR FOR HIGH-SPEED SWITCHING The 2SB1453 is a power transistor that can directly drive from PACKAGE DRAWING (UNIT: mm) the IC output. This transistor is ideal for motor drivers and solenoid drivers in such as OA and FA equipment. In addition, a small resin-molded insulation type package contributes to high-density mounting and reduction of mounting cost. FEATURES • High DC current amplifier ratio hFE ≥ 100 (VCE = −5 V, IC = −0.5 A) • Mold package that does not require an insulating board or insulation bushing ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Parameter Collector to base voltage Collector to emitter voltage Emitter to base voltage Collector current (DC) Collector current (pulse) [ ... ]
B1453 PDF Datasheet Download
