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Specialized - Thyratron ·Thyratron

NL632B

Indirectly heated mercury-vapor thyratron designed for control, timing, and ignitor-firing applications, with shield-grid construction providing stable operation from high-impedance control circuits.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
DOWN
Socket code
-
Base pins
-
Nominal heater
5 V / 4.7 A

Description

NATIONAL POWER TUBE NL-632B is an indirectly heated cathode thyratron designed especially for con- trol, timing, and ignitor firing applicatons. The shield grid construction and mercury vapor filling give stable operation even with high impedance grid supplies. NL-632B THYRATRON TUBE TECHNICAL INFORMATION do Amperes output (maximum) 2.5 Instantaneous Amperes output (maximum) 30 Maximum time of averaging anode current (seconds) 15 Maximum peak inverse volts 1500 Maximum peak forward volts 1

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
DOWN
Socket code
-
Base pins
-
Nominal heater voltage
5 V
Nominal heater current
4.7 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

DOWN - 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
1500 V
Max cathode current
2.5 A

Gas/mercury-filled grid-controlled rectifier (thyratron).

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

1956 National Electronics Industrial Tubes

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • 2.5 Amperes do

    30 Amperes Peak A

    Source technical-information table; wording preserved from datasheet.

  • do Amperes output (maximum)

    2.5 A

    Source technical-information table; wording preserved from datasheet.

  • Instantaneous Amperes output (maximum)

    30 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum time of averaging anode current (seconds)

    15 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum peak inverse volts

    1500 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum peak forward volts

    1500 V

    Source technical-information table; wording preserved from datasheet.

  • Filament volts

    5.0 ± .25 V

    Source technical-information table; wording preserved from datasheet.

  • Filament amperes

    4.6 ± .3 A

    Source technical-information table; wording preserved from datasheet.

  • Heating time (seconds)

    300 s

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative control grid voltage before conduction (volts)

    1000 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative control grid voltage during conduction (volts)

    10 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative shield grid voltage before conduction (volts)

    300 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative shield grid voltage during conduction (volts)

    5 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum control grid current (average amperes)

    250 mA

    Source technical-information table; wording preserved from datasheet.

  • Maximum control grid current (peak amperes)

    1 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum shield grid current (average amperes)

    250 mA

    Source technical-information table; wording preserved from datasheet.

  • Maximum shield grid current (peak amperes)

    1 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum critical control grid current (microamperes)

    1 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum ac short circuit current (amperes)

    150 A

    Source technical-information table; wording preserved from datasheet.

  • Condensed mercury temperature limits (°C)

    +40 to +80 C

    Source technical-information table; wording preserved from datasheet.

  • Approximate temperature rise, cond. mercury above ambient (°C)

    30 C

    Source technical-information table; wording preserved from datasheet.

  • Net weight (ounces)

    8 oz

    Source technical-information table; wording preserved from datasheet.

  • Approx. shipping weight (lbs.)

    4 lb

    Source technical-information table; wording preserved from datasheet.

  • y

    900

    Source technical-information table; wording preserved from datasheet.

  • TERMINAL

    Q | 600

    Source technical-information table; wording preserved from datasheet.

  • SHIELD

    CATHODE A HEATER | .x | -!1 | -2* | 2 | -20 | X16 | Ali | -e | -4 | 0 | M | ♦6

    Source technical-information table; wording preserved from datasheet.

  • 6fA-•

    W0 CMARACTCRIST ICS

    Source technical-information table; wording preserved from datasheet.

Characteristic

  • Typical arc drop at 10 amperes peak (volts)

    12 V

    Source technical-information table; wording preserved from datasheet.

  • Ionization time (approx., microseconds)

    10 us

    Source technical-information table; wording preserved from datasheet.

  • Deionization time (approx., microseconds)

    1000 us

    Source technical-information table; wording preserved from datasheet.

  • Anode to control grid capacitance (uuf)

    0.04 pF

    Source technical-information table; wording preserved from datasheet.

  • Cathode to control grid capacitance (uuf)

    4.4 pF

    Source technical-information table; wording preserved from datasheet.

Data set 02

1957 National Electronics

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • Maximum DC output current

    2.5 A

  • Maximum instantaneous output current

    30 A

  • Maximum peak inverse voltage

    1500 V

  • Maximum peak forward voltage

    1500 V

  • Maximum negative grid voltage before conduction

    1000 V

  • Maximum negative grid voltage during conduction

    10 V

Characteristic

  • Filament heating time

    30 s

  • Typical arc drop

    12 V

Construction

  • Filling

    Mercury vapor

Capacitance

  • Anode-grid capacitance

    0.04 pF