BUT21B NPN Transistor

The BUT21B is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BUT21B transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BUT21B 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 BUT21B transistor as follows.

BUT21B Transistor Specification

Transistor Code		BUT21B
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO220
Collector Power Dissipation (Maximum)	PC	100W
Collector-Base Voltage (Maximum)	VCB	750V
Collector-Emitter Voltage (Maximum)	VCE	400V
Collector Current (Maximum)	IC	5A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	1.5V
Forward Current Transfer Ratio (hFE Value)		25

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