BF291A NPN Transistor

The BF291A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BF291A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BF291A 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 BF291A transistor as follows.

BF291A Transistor Specification

Transistor Code		BF291A
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO72
Collector Power Dissipation (Maximum)	PC	0.8W
Collector-Base Voltage (Maximum)	VCB	160V
Collector-Emitter Voltage (Maximum)	VCE	120V
Collector Current (Maximum)	IC	0.03A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	4V
Forward Current Transfer Ratio (hFE Value)		80
Transition Frequency	FT	40MHz
Collector Capacitance	CC	0.4pF

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