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20TC4

Thyratron for electronic switching and controlled conduction. Available manufacturer material confirms thyratron service without supporting a narrower functional description.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 1.5 A

Description

Hydrogen-filled tacitron discharge tube with very short ionization and deionization times, intended for relay, pulse-shaping, oscillator, switching and control circuits.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 1.5 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: 400 V

Published ratings and characteristics promoted from the source where directly stated.

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

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristics

Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
1.5 A
Published nominal value
Warm-up time
5 s
Published heater warm-up time