BDT21 NPN Transistor

The BDT21 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BDT21 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BDT21 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 BDT21 transistor as follows.

BDT21 Transistor Specification

Transistor Code		BDT21
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO220
Collector Power Dissipation (Maximum)	PC	62W
Collector-Base Voltage (Maximum)	VCB	130V
Collector-Emitter Voltage (Maximum)	VCE	130V
Collector Current (Maximum)	IC	8A
Operating Junction Temperature (Maximum)	TJ	150°C
Forward Current Transfer Ratio (hFE Value)		500

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