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2N5156 Germanium Switching Transistor For Audio

Ernst Erb Jacob Roschy Bernhard Nagel 
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Forum » Valves / tubes - Semiconductors » Semiconductors » 2N5156 Germanium Switching Transistor For Audio
Omer Suleimanagich
Omer Suleimanagich
USA  Articles: 429
Schem.: 3
Pict.: 56
19.Feb.18 09:42

Count of Thanks: 4
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Can this transistor be used as a power transistor in and audio amplifier circuit?


Type Designator: 2N5156

Material of Transistor: Ge

Polarity: PNP

Maximum Collector Power Dissipation (Pc): 93 W

Maximum Collector-Base Voltage |Vcb|: 100 V

Maximum Collector-Emitter Voltage |Vce|: 60 V

Maximum Emitter-Base Voltage |Veb|: 60 V

Maximum Collector Current |Ic max|: 10 A

Max. Operating Junction Temperature (Tj): 100 °C

Transition Frequency (ft): 0.15 MHz

Forward Current Transfer Ratio (hFE), MIN: 25

Noise Figure, dB: -

Package: TO3

Michael Watterson
IRL  Articles: 1004
Schem.: 650
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20.Feb.18 14:24

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Yes, though it depends on the circuit. Push Pull would be best as then the bias currents cancel on the transformer.

A pair of these on a heatsink would be suitable to replace the 12V DC converter of the FT101 series. The FT101Z, FT101ZD etc has the windings on the transformer, but lacks the connector.