This part is a kind of semiconductor called A1645.

Function of this product has 2SA1645.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

( DataSheet : ) DATA SHEET SILICON POWER TRANSISTOR 2SA1645, 2SA1645-Z PNP SILICON EPITAXIAL TRANSISTOR FOR HIGH-SPEED SWITCHING The 2SA1645 is a mold power transistor developed for highspeed switching and features a very low collector-to-emitter saturation voltage. This transistor is ideal for use in switching power supplies, DC/DC converters, motor drivers, solenoid drivers, and other low-voltage power supply devices, as well as for highcurrent switching. FEATURES • Fast switching speed • Low collector-to-emitter saturation voltage: VCE(sat) = −0.3 V MAX. @IC = −4 A ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Parameter Collector to base voltage Collector to emitter voltage Emitter to base voltage Collector current Collector current Base current Total power dissi [ ... ]

A1645 PDF Datasheet Download