2N4421 NPN Transistor

The 2N4421 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2N4421 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N4421 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 2N4421 transistor as follows.

2N4421 Transistor Specification

Transistor Code		2N4421
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	12V
Collector Current (Maximum)	IC	0.2A
Operating Junction Temperature (Maximum)	TJ	125°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		25
Transition Frequency	FT	300MHz
Collector Capacitance	CC	5pF

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