BU921 NPN Transistor

The BU921 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BU921 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BU921 transistor symbol shows an arrow from the base into the emitter. This means that the current flows from collector terminal to emitter terminal.

Circuit diagram symbol of the BU921 transistor as follows.

BU921 Transistor Specification

Transistor Code		BU921
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO3
Collector Power Dissipation (Maximum)	PC	120W
Collector-Base Voltage (Maximum)	VCB	550V
Collector-Emitter Voltage (Maximum)	VCE	450V
Collector Current (Maximum)	IC	10A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		100

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