2N4997 NPN Transistor

The 2N4997 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2N4997 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N4997 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 2N4997 transistor as follows.

2N4997 Transistor Specification

Transistor Code		2N4997
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		X55-1
Collector Power Dissipation (Maximum)	PC	0.25W
Collector-Base Voltage (Maximum)	VCB	30V
Collector-Emitter Voltage (Maximum)	VCE	18V
Collector Current (Maximum)	IC	0.05A
Operating Junction Temperature (Maximum)	TJ	200°C
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	600MHz
Collector Capacitance	CC	0.7pF

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