C 2N4122 Epitaxial PNP BJT Transistor TO-106 Package OM0122J

C 2N4122 Epitaxial PNP BJT Transistor TO-106 Package OM0122J

£6.00

30 in stock

SKU: OM0122J Category:

Description

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1 Piece

This early 2N4122 is a epitaxial PNP small-signal bipolar junction transistor (BJT). It is famous for high-frequency use in vintage test gear like Tektronix oscilloscopes (often mapped to part number 151-0220-00). Available here in the early round-flat TO-106 epoxy plastic package featuring gold-plated leads.
Historically used in high-frequency amplifier and switching applications.
Originally introduced and manufactured by Fairchild Semiconductor, which featured it in their early 1970s transistor catalogue. It was also second-sourced or packaged by alternative manufacturers like Teledyne Semiconductor.
These have no obvious logo or makers mark, they do have a C prefix and are made in the flat-faced, domed top TO-106 package, (an early plastic successor to the TO-18 metal can).
These early transistors date mostly to the late 1960s through the 1970s before the industry standardized on the cheaper TO-92.
They have a 231 date code which typically decodes to the 31st week of 1972 (using the common 3-digit YWW format where 2 is 1972 and 31 is the week),
Technical Specifications
  • Polarity: PNP
  • Material: Silicon (Si)
  • Package Type: TO-92 or TO-106
  • Max Collector-Emitter Voltage (\(V_{CEO}\)): 40 V
  • Max Collector-Base Voltage (\(V_{CBO}\)): 40 V
  • Max Emitter-Base Voltage (\(V_{EBO}\)): 5 V
  • Max Collector Current (\(I_{C}\)): 0.1 A (100 mA)
  • Max Power Dissipation (\(P_{D}\)): 0.2 W
  • Transition Frequency (\(f_{T}\)): 450 MHz
  • Forward Current Transfer Ratio (\(h_{FE}\)): ~150
  • Collector Capacitance (\(C_{c}\)): 5 pF [1, 2, 3, 4]
  • Replacements: Because of its high transition frequency (450 MHz) and low collector capacitance (5 pF), finding a direct modern drop-in requires matching high-frequency PNP parameters if used in RF or vintage oscilloscope circuits.
Later versions of the 2N4122 were manufactured in the TO-92 package, these are are in the earlier TO-106 “unibody” plastic package used by manufacturers like MicroElectronics and Fairchild in the late 1960s and 1970s

For datasheet search…”early 2N4122″

Or go directly to…

https://pdf.datasheet.live/dd7fa43b/national.com/2N4122.pdf

PLEASE NOTE!

These parts came to us as part of a lot of surplus stock from a large distribution Co. and have been kept in storage for a time, they are however pristine, and, as with all our products they come with a full guarantee. 

If you have similar items to this, or indeed any electronic components that are surplus to requirements please contact us with details.

Additional information

Brand

MPN

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