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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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Tube-number record

SR 250Y50

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BrandPhilips
ClassSelenium Rectifier
BaseSpecial / none

Construction

Primary Type
Other / special
Rectifier Typehalf-wave
EnvelopeFlat metal type
Base MaterialMetal
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Cathode Current50 mA

Audio Performance

Key Features
  • long life
  • no filament heating
  • high overload factor
  • low internal resistance
  • shock-proof
  • tropical use

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Nominal rating (A)250 V———50 mA
Reduced rating (B)200 V———40 mA

Application Notes

Specifically designed for radio and television receivers. Lifetime approximately 10,000 hours at nominal ratings or 50,000 hours at reduced ratings.

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