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458A

Information - Help 
ID = 78068
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Voltage Limiter, rare gas filled 
  Ca. 1925 up to 1945 extraordinarily rare. Production was less than 100 items. ****
Identical to 458A
Base Wires
Was used by Telephony
Filament --/--
Description

Protective gas diode for SD submarine cable system. Designed to protect each repeater from overvoltage transients.

  • 60 V breakdown voltage
  • 50 V sustaining voltage
  • Breakdown time at 4 kV / microsec, less than 0.7 microsec. max
  • 5 mA average current
  • 1500 A surge current
 
Information source - - Manufacturers Literature   
 
458a.jpg

 
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