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BF391 NPN Transistor

The BF391 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BF391 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BF391 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 BF391 transistor as follows.

Circuit diagram symbol of the BF391 transistor

BF391 Transistor Specification

Transistor Code BF391
Transistor Type BJT
Transistor Polarity NPN
Transistor Material Silicon(SI)
Package TO92
Collector Power Dissipation (Maximum) PC 0.625W
Collector-Base Voltage (Maximum) VCB 200V
Collector-Emitter Voltage (Maximum) VCE 200V
Collector Current (Maximum) IC 0.5A
Operating Junction Temperature (Maximum) TJ 150°C
Emitter-Base Voltage (Maximum) VEB 5V
Forward Current Transfer Ratio (hFE Value) 40
Transition Frequency FT 35MHz
Collector Capacitance CC 3pF

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