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502A

Gas-filled negative-control triode thyratron designed for high-sensitivity relay-control service, providing grid-triggered switching from comparatively small control signals.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 6BS
Socket code: B7G
Base pins: 6
Nominal heater: 6.3 V / 600 mA

Description

Gas-filled negative-control triode thyratron for high-sensitivity relay-control service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6BS
Socket code: B7G
Base pins: 6
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

6BS - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IS	A	IS — Internal Screen Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS
PIN2H	—	H — Heater Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS
PIN3P	A	P — Plate (Anode) Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS
PIN5G1	A	G1 — Control Grid Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS
PIN6G2	A	G2 — Screen Grid Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS
PIN7H	—	H — Heater Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS
PIN8K	A	K — Cathode Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BS

Section ratings

1 physical section, each with unique specifications.

Section 1

Thyratron

X-ray radiationInterelectrode capacitances

Max cathode current: 100 mA

Published maximum ratings, operating characteristics, rectifier/deflection data reviewed.

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 General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
600 mA
Published heater/filament rating
Anode voltage drop
8 V
ControlledRectifier

Other

Maximum DC cathode current
100 mA
ControlledRectifier
Maximum peak inverse voltage
1300 V
ControlledRectifier
Maximum peak cathode current
1 A
ControlledRectifier

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Application

Application
High-sensitivity relay control

Other

Peak forward anode voltage
650 V
Pulse
Peak inverse anode voltage
1300 V
Pulse