2N2221 NPN High-Speed Switch

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The 2N2221 is silicon planar epitaxial NPN transistors in Jedec TO-39 (for 2N2218 and 2N2219). It is designed for high-speed switching applications at collector currents up to 500 mA and features useful current gain over a wide range of collector current, low leakage currents, and low saturation voltages.

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2N2221 Pinout

2N2221 Pin Configuration

Pin No	Pin Name
1	Emitter
2	Base
3	Collector

2N2221 Key Features

Silicon NPN Transistor
Metal Case (JEDEC TO-18)
High Speed Switching

2N2221 Specification

Name	Description
Collector-Emitter Voltage (Vce)	30 V
Collector-Base Voltage (Vcb)	60 V
Emitter-Base Voltage (Veb)	5 V
Collector Current (Ic)	0.8 A
Collector Power Dissipation (Pc)	0.5 W
Transition Frequency	250 MHz