BF291 NPN Transistor

The BF291 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BF291 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BF291 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 BF291 transistor as follows.

BF291 Transistor Specification

Transistor Code		BF291
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO72
Collector Power Dissipation (Maximum)	PC	0.8W
Collector-Base Voltage (Maximum)	VCB	120V
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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