4B25

Gas-filled industrial full-wave rectifier for power-supply and high-current conversion service. The available source establishes its heavy rectifier function but does not support a more numerical description.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: A
Base pins: -
Nominal heater: -

Description

The 4B25 is a gas-filled rectifier documented in the approved datasheet, with published filament and rectifier operating ratings.

Socket description

A-type industrial rectifier base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: A
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published rectifier/control ratings promoted where applicable.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical rectifier section; populated from corresponding identical section.

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

1942 Electrons Inc

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

Heating time
40 s
Published datasheet value

SECTION 2

Rectifier

Characteristics

Heating time
40 s
Published datasheet value