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Specialized - Thyratron ·Thyratron

627

Gas-filled grid-controlled thyratron for controlled rectifier, relay, motor-control, industrial switching, or pulse service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
IO
Base pins
8
Nominal heater
2.5 V / 6 A

Description

Grid-controlled vapor rectifier for controlled high-current rectification and switching service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
8
Nominal heater voltage
2.5 V
Nominal heater current
6 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Thyratron

X-ray radiationInterelectrode capacitances
Max plate voltage
1250 V
Max cathode current
2.5 A
Rectifier peak inverse voltage
2500 V
Rectifier nominal output current
640 mA
Rectifier peak forward current
2.5 A
Rectifier forward voltage drop
12 V

Thyratron section; peak/average current, inverse voltage, timing, and gas/mercury data retained as parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • HeaterVoltageNominal

    2.5 V

    Nominal

  • HeaterCurrentNominal

    6 A

    Nominal

  • Maximum Peak Inverse Voltage

    2500 V

  • AverageOrDCOutputCurrent

    640 mA

  • MaximumPeakForwardCurrent

    2.5 A

  • Peak Forward Anode Voltage

    1250 V

Characteristic

  • Forward Voltage Drop

    12 V

  • IonizationTimeMaximum

    10 us

  • DeionizationTimeMaximum

    1000 us

Data set 02

1971 RCA HB3 Binder 2 of 7

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • Peak forward anode voltage

    1250 V

  • Peak inverse anode voltage

    2500 V

  • Peak cathode/anode current

    2.5 A

  • Average cathode/anode current

    640 mA

  • Fault or surge current

    25 A

    ShortDuration

  • Ambient temperature range

    25 to 70 C condensed-mercury

  • Filament voltage

    2.5 V

  • Filament current

    6 A

Characteristic

  • Ionization time

    10 us

    Approximate

  • Deionization time

    1000 us

    Approximate

  • Anode voltage drop

    12 V

    Conducting

  • Minimum heating time

    10 s

    BeforeConduction

Construction

  • Gas fill

    Mercury vapor

Capacitance

  • Grid-to-anode capacitance

    2.5 pF

    Approximate