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The 2N3055  (P/N 151-0140-00) is a general-purpose silicon NPN power transistor that is widely used in Tek gear.

The 2N3055H is an epitaxial device with higher safe operating area than a standard 2N3055 at VCE >40 V.

Key Specifications

IC 15 A
FT 0.3 MHz
PD 115 W

Note: Tek part number 151-0140-00 refers to parts selected from the original late-1960s version that has relatively modest hfe. Care must be taken when replacing them with modern equivalents that have higher hfe – see for example the 7603 repair report at amplifier.cd (German) that discusses problems caused by replacing Q1216/Q1218 in the HV oscillator of a 7603.

Used in

Some instruments using part 2N3055

Instrument Manufacturer Class Model Description Introduced
7603 Tektronix Oscilloscope 7603 100 MHz non-storage mainframe 1972
7613 Tektronix Oscilloscope 7613 100 MHz variable-persistence storage mainframe 1972
7623 Tektronix Oscilloscope 7623 100 MHz multi-mode storage scope 1972
7623A Tektronix Oscilloscope 7623A 100 MHz multi-mode storage scope 1974
7623B Tektronix Oscilloscope 7623B 100 MHz multi-mode storage scope 1990
7633 Tektronix Oscilloscope 7633 100 MHz multi-mode storage mainframe 1974
TM5006 Tektronix Mainframe TM5006 six-bay mainframe 1982
TM504 Tektronix Mainframe TM504 four-bay mainframe 1975
TM506 Tektronix Mainframe TM506 six-bay mainframe 1975