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PL2D21

Gas-filled tetrode thyratron for relay service, electronic timers, stabilized rectifiers, and grid-controlled rectifiers.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

Gas-filled tetrode thyratron for relay service, electronic timers, stabilized and grid-controlled rectifiers.

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: 600 mA
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: 100 mA

Promoted only where the locked schema has a direct semantic match; additional CRT, regulator, thyratron, pulse, capacitance, and operating values are retained in TUBE_SECTION_PARAMETER.

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

1963 Philips Electron Tubes Handbook V3

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

Arc voltage drop
8 V
Thyratron
Ionization time
0.5 µs
Thyratron
Deionization time
35 µs
Thyratron
Critical grid current
0.5 µA
Va460V;Ia0.1A

Other

Peak forward anode voltage maximum
650 V
Thyratron
Peak inverse anode voltage maximum
1300 V
Thyratron
Peak cathode/anode current maximum
500 mA
Thyratron
Average cathode/anode current maximum
100 mA
Thyratron
Relay-service anode voltage
400 V RMS
RelayService

Construction

Gas/fill
Gas filled
Thyratron

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

Warm-up time
20 s

Other

Heater voltage tolerance
10 %