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NL635L

Lug-base version of the NL635 industrial rectifier. Its directly heated construction provides approximately 1 kV peak inverse voltage and 6.4 A nominal output for high-current power conversion.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 2.5 V / 18 A

Description

NL635L industrial power rectifier tube.

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: 18 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

Rectifier

X-ray radiationInterelectrode capacitances

Max cathode current: 6.4 A
Rectifier peak inverse voltage: 1000 V
Rectifier nominal output current: 6.4 A
Rectifier peak forward current: 77 A
Rectifier forward voltage drop: 9 V
Rectifier warm-up time: 60 s

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

1957 National Electronics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Maximum DC output current
6.4 A
Maximum instantaneous output current
77 A
Maximum peak inverse voltage
1000 V

Characteristic

Filament heating time
60 s
Typical arc drop
9 V
Typical anode starting voltage
20 V

Construction

Filling
Argon/mercury vapor

Application

Service
Industrial power rectifier