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Specialized - Thyratron ·Thyratron

410A

Mercury-vapor thyratron with negative control grid for controlled-rectifier and inverter service, providing grid-triggered power conduction in conversion and switching equipment.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
UX4
Base pins
4
Nominal heater
2.5 V / -

Description

Mercury-vapor thyratron with negative control grid for controlled-rectifier or inverter service.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UX4
Base pins
4
Nominal heater voltage
2.5 V
Nominal heater current
-
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 cathode current
32 A

Promoted fields mapped from printed maximum-rating and characteristic headings; additional published values preserved in parameter rows.

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

2026 Western Electric 400s

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

  • Avereging Time . . . & v v

    4 seconds

    Avereging Time . . . & v v 4 & ¢ & o 2 o o o 2 o » o« » = s « « 15 seconds

  • {Averaging time = one eycle). . + v + -« ¢ s . v s« o v+ o

    0.25 ampere

    {Averaging time = one eycle). . + v + -« ¢ s . v s« o v+ o 0.25 ampere

  • Filament Voltage . . . . . ., . ¢ v ¢ ¢ ¢ o « « »

    2.37 volts

    Filament Voltage . . . . . ., . ¢ v ¢ ¢ ¢ o « « » 2.37 2.5 2.62 volts

  • Epp=

    100 volts

    Epp=100 volts;THg=4OC;Grid Overvoltage=5 volis ---- 15 ---- microseconds

  • Bpp=

    100 volts

    Bpp=100 volts;THg=80C;Grid (vervoltage=25 volts ---- 2 --== microsaconds

  • inode Voltage Drop . - v v ¢ v + + v

    4 volts

    inode Voltage Drop . - v v ¢ v + + v 4 4 o o o 8 wme= 12 ---- volts

Capacitance

  • Grid to Filement Capacitance . . . + ¢

    4 uuf

    Grid to Filement Capacitance . . . + ¢ 4 ¢« v &« o ==--- 15 weae uuf,