Alternatives & variations Download PDF datasheet

NL627

Directly heated National Electronics industrial rectifier for very-high-current conversion. Rated for approximately 1 kV peak inverse voltage and 20 A nominal output with a low conducting drop.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 2.5 V / 26 A

Description

The NL627 is a National Electronics industrial rectifier tube with published DC output-current and peak-inverse-voltage ratings.

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: 26 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

Rectifier peak inverse voltage: 1000 V
Rectifier nominal output current: 20 A
Rectifier peak forward current: 120 A
Rectifier forward voltage drop: 10 V
Rectifier warm-up time: 120 s

Published rectifier ratings promoted from technical-information table.

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

Rectifier

Other

Maximum peak inverse voltage
1000 V
Published datasheet value
Maximum DC output current
20 A
Published datasheet value
Maximum instantaneous output current
120 A
Published datasheet value
Maximum AC short-circuit current
1000 A
Published datasheet value

Characteristics

Heating time
120 s
Published datasheet value
Typical arc drop
10 V
At stated peak current