BUY21A NPN Transistor

The BUY21A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BUY21A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BUY21A 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 BUY21A transistor as follows.

BUY21A Transistor Specification

Transistor Code		BUY21A
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO3
Collector Power Dissipation (Maximum)	PC	85W
Collector-Base Voltage (Maximum)	VCB	400V
Collector-Emitter Voltage (Maximum)	VCE	230V
Collector Current (Maximum)	IC	7A
Operating Junction Temperature (Maximum)	TJ	200°C
Forward Current Transfer Ratio (hFE Value)		20
Transition Frequency	FT	15MHz
Collector Capacitance	CC	200pF

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