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Specialized - Thyratron ·Thyratron

2D21

Gas-filled tetrode thyratron widely used for relay, controlled-rectifier, and pulse-switching applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: B7G
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 600 mA

Description

Gas-filled tetrode thyratron for relay, controlled-rectifier and pulse-switching applications.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: B7G
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B7G - 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: 1300 V
Max cathode current: 600 mA
Rectifier peak inverse voltage: 1300 V

Gas-discharge device.

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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

Heater voltage
6.3 v
Nominal curren
600 mA
Cathode heating time, minimum
10 sec
Grid to anode
0.026 pF
Inpu
2.4 pF
Outpu
1.6 pF
conduction
-100 v
before conduction
-100 v
Maximum peak cathode curren
500 mA
Maximum average cathode curren
100 mA
Maximum fault curren
10 A
Maximum duration of fault curren
0.1 sec
Maximum average screen curren
10 mA

Characteristic

Deionization . {v 125M\735u\;Ed
100 v
me, approx Rg; 1000 0
10.1 A
Va 125V1 Vg, —
10 V
Rg11000Q I
100 mA
Critical grid With V,
460 V
current, max. la av
100 mA
Voltage drop, approx
8 v

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
600 mA

Data set 03

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

Heater Voltage Minimum
5.7 V
Heater Voltage Maximum
6.9 V

Characteristics

Heater Current Minimum
540 mA
At 6.3V
Heater Current Maximum
660 mA
At 6.3V
Heating Time
10 s
Anode Voltage Drop
8 V
Anode-Grid1 Capacitance
0.03 pF
Input Capacitance
2.5 pF
Output Capacitance
1.6 pF

Data set 04

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

Heater or filament heating time
10 s
Tube drop
8 V
Conducting
Ionization time
0.5 us
Approximate

Other

Peak forward anode voltage
650 V
Peak inverse anode voltage
1300 V
Peak anode current
500 mA
Average anode current
100 mA
Maximum grid voltage
-100 V

Data set 05

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristics

Gas filling
Gas
Cathode heating time
10 s

Other

Peak forward anode voltage
650 V

Data set 06

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

Anode voltage drop
8 V
ControlledRectifier

Other

DC cathode current maximum
100 mA
ControlledRectifier
Peak inverse voltage maximum
1300 V
ControlledRectifier
Peak cathode current maximum
500 mA
ControlledRectifier

Data set 07

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

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

Application

Application
Relay / controlled rectifier

Data set 08

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

Heater heating time
10 s
Tube drop
8 V
Conducting
Ionization time
0.5 us
Approximate

Other

Peak forward anode voltage
650 V
Peak inverse anode voltage
1300 V
Peak anode current
500 mA
Average anode current
100 mA
Maximum grid voltage
-100 V

Data set 09

1968 Mazda Belvu

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
600 mA
Published nominal value

Other

Peak cathode current
10 A
Pulse operation; published limit

Data set 10

1971 Mullard Gas Filled Tubes

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

Maximum peak anode voltage
1.3 kV
Maximum average cathode current
600 mA
Heater/filament voltage
6.3 V
Heater/filament current
600 mA

Data set 11

1971 RCA HB3 Binder 2 of 7

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristics

Voltage (AC or DC) — published value 1
5.7 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
Voltage (AC or DC) — published value 2
6.3 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
Voltage (AC or DC) — published value 3
6.9 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
For conditions: do anode volts= 100; grid-No. l
100 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
s au a.re-pulse volts = 50; peak anode amp
50 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
For conditions: do anode volts = 125; grid-No. l
125 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
volts = -100, grid-No. l resistor Iohmsl =
-100 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 1
1000 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 2
0 mA
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 3
1 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 4
35 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 1
1000 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 2
0 mA
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 3
1 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
1000; do anode amp. = 0. 1 — published value 4
75 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
supply volts Irms) = 460, and average anode
460 V
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
amp. ~ 0. 1 — published value 1
0 mA
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
amp. ~ 0. 1 — published value 2
1 A
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.
amp. ~ 0. 1 — published value 3
500 mA
Published datasheet value; multiple values on one row represent separate limits, service ratings, or operating conditions.

Data set 12

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

Heater Current
600 mA
Published in approved target datasheet entry
Heating time prior to tube conduction
10 seconds
Published in approved target datasheet entry
Peak value —100
25 V
Published in approved target datasheet entry
125; grid-No
1 V
Published in approved target datasheet entry
Anode Voltage Drop (Approx.)
8 V
Published in approved target datasheet entry
ohms) = 0 ; grid-No
2 V
Published in approved target datasheet entry
Forward
650 V
Published in approved target datasheet entry
Inverse
1300 V
Published in approved target datasheet entry
Peak, before anode conduction
100 V
Published in approved target datasheet entry
Average, during anode conduction"
10 V
Published in approved target datasheet entry
Average" 4
-10 mA
Published in approved target datasheet entry
Ambient Temperature Range 75 to -|
-90 °C
Published in approved target datasheet entry
TYPE 2D2I GRID-No
2 V
Published in approved target datasheet entry
OF 5.7 TO
6.9 V
Published in approved target datasheet entry

Capacitance

Grid No. 1 to anode
0.026 pF
Published in approved target datasheet entry
Input
2.4 pF
Published in approved target datasheet entry
Output
1.6 pF
Published in approved target datasheet entry