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2N491

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ID = 45232
       
Country:
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Tube type:  Transistor 
Identical to 2N491
Similar Tubes
Normally replaceable-slightly different:
  2N489 ; 2N493

Base Wires
Description

Silicon unijunction transistor. 250mW power dissipation, 2A peak emitter current, 60V emitter reverse voltage.
5.6 kohms interbase resistance at 25 degrees/C, 0.62 intrinsic standoff ratio, 0.07 microamps emitter reverse current at 25 degrees/C.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
9 x 7 x 9 mm / 0.35 x 0.28 x 0.35 inch
Weight 1 g / 0.04 oz
Information source -- Original prospect or advert   Electronics, Dec. 1957, pg. 257
- - Manufacturers Literature   KTT 1969/70, GE

us_ge_2n491_sch1.png
2N491: General Electric Transistor Manual 1960
Pius Steiner
    More ...
to33_4.gif 2N491: TTT Steidle 1981
Günther Stabe † 19.8.20

2n491_production_process.png
2N491: GE
Günther Stabe † 19.8.20

Collection of

 
ge_2n491_front.jpg

2N491
 

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