Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Thyratron ·Thyratron

S1540I

Heavy-current thyratron for industrial controlled-power service. Its large heater supports substantial gas-discharge switching.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 20 A

Description

Mercury-vapor thyratron with indirectly heated oxide cathode, used primarily as a high-voltage half-wave rectifier and also as a switching and control tube in industrial regulating equipment.

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
5 V
Nominal heater current
20 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
15000 V
Max cathode current
12 A

Thyratron has no dedicated canonical SectionType; represented as Other.

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

1953 AEG

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • Filament voltage

    5 V

  • Filament current

    20 A

  • Warm-up time minimum

    600 sec

  • Peak anode voltage maximum

    15 kV

  • Peak inverse voltage maximum

    15 kV

  • Peak anode current maximum

    40 A

  • Average anode current maximum

    12 A

Characteristic

  • Arc voltage drop

    15 V

Data set 02

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristics

  • Heater or filament voltage

    5 V

    Published nominal value

  • Heater or filament current

    20 A

    Published nominal value

Other

  • Maximum anode voltage

    15 kV

    Published

  • Minimum anode voltage

    600 V

    Published