BF509S PNP Transistor

The BF509S is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the BF509S transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BF509S transistor symbol shows an arrow from the emitter into the base. This means that the current flows from emitter to collector terminal.

Circuit diagram symbol of the BF509S transistor as follows.

BF509S Transistor Specification

Transistor Code		BF509S
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Silicon(SI)
Package		TO92
Collector Power Dissipation (Maximum)	PC	0.3W
Collector-Base Voltage (Maximum)	VCB	40V
Collector-Emitter Voltage (Maximum)	VCE	35V
Collector Current (Maximum)	IC	0.03A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	4V
Forward Current Transfer Ratio (hFE Value)		25
Transition Frequency	FT	400MHz
Collector Capacitance	CC	0.5pF

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