2N4427 NPN Overlay Transistor – Datasheet

2N4427 NPN overlay transistors in TO-39 metal packages with the collector connected to the case. The device is primarily intended for class-A, B, or C amplifiers, frequency multiplier, and oscillator circuits.

2N4427 Pinout

2N4427 Pin Configuration

Pin No	Pin Name
1	Emitter
2	Base
3	Collector

2N4427 Specification

Name	Description
Collector-Emitter Voltage (Vce)	20 V
Collector-Base Voltage (Vcb)	40 V
Emitter-Base Voltage (Veb)	2 V
Collector Current (Ic)	0.4 A
Collector Power Dissipation (Pc)	1 W
Transition Frequency	500 MHz

Application

• The transistors are intended for use in output, driver or pre-driver stages in VHF and UHF equipment

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