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Specialized - Thyratron ·Triode

NL5665

Compact quick-heating xenon thyratron designed for motor-speed and welding-control applications, combining high-current capability with wide-temperature industrial operation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.5 V / 31 A

Description

National Power Tube NL-5665/C16J is a com- pact, quick heating thyratron designed for motor speed control and welding control applications. It is xenon filled for quick starting and the ability to operate within very wide temperature limits. TECHNICAL INFORMATION do Amperes output (Maximum) 18 16 Instantaneous amperes output (Maximum) 100 160 Maximum time of averaging anode current (seconds) 4.5 Maximum peak inverse volts 1250 Maximum peak forward volts 1000 Max. commutation factor (V

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
2.5 V
Nominal heater current
31 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

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
1000 V
Max cathode current
18 A
Rectifier peak inverse voltage
1250 V
Rectifier nominal output current
18 A
Rectifier peak forward current
160 A
Rectifier warm-up time
60 s

Thyratron section; published switching/rating data retained below.

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

Triode

Other

  • 18 Amperes do

    160 Ampere peak A

    Source technical-information table; wording preserved from datasheet.

  • do Amperes output (Maximum)

    18 | 16 A

    Source technical-information table; wording preserved from datasheet.

  • Instantaneous amperes output (Maximum)

    100 | 160 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum time of averaging anode current (seconds)

    4.5 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum peak inverse volts

    1250 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum peak forward volts

    1000 V

    Source technical-information table; wording preserved from datasheet.

  • Max. commutation factor (V/usec. x A/usec.) at max. initial inverse voltage of 330 volts

    0.66 V

    Source technical-information table; wording preserved from datasheet.

  • Filament volts

    2.5 V

    Source technical-information table; wording preserved from datasheet.

  • Filament amperes

    31 ± 3 A

    Source technical-information table; wording preserved from datasheet.

  • Filament heating time (seconds)

    60 s

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative grid voltage before conduction (volts)

    100 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative grid voltage during conduction (volts)

    10 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum critical grid current (microamps)

    10 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum ac short circuit current (amperes)

    1000 A

    Source technical-information table; wording preserved from datasheet.

  • Ambient temperature lim its (°C)

    —55 to +75 C

    Source technical-information table; wording preserved from datasheet.

  • Net weight (ounces)

    32 oz

    Source technical-information table; wording preserved from datasheet.

  • Approx. shipping weight (lbs.)

    31A lb

    Source technical-information table; wording preserved from datasheet.

  • ANODE

    w | 4-

    Source technical-information table; wording preserved from datasheet.

  • PERCET DUTY

    2 TUBES CONNECTED

    Source technical-information table; wording preserved from datasheet.

Characteristic

  • Typical arc drop at 50 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 grid capacitance (uuf) (approx.)

    8 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

Triode

Other

  • Maximum peak forward voltage

    1000 V

  • Maximum peak output current

    160 A

  • Maximum dc output current

    18 A