4B27

Gas-filled full-wave industrial rectifier for high-current power conversion. Its heavy filament and multiampere output capability suit substantial industrial DC power supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: J4
Base pins: -
Nominal heater: 2.5 V / 10 A

Description

The 4B27 is a gas-filled rectifier with published output-current, output-voltage, and peak-inverse-voltage ratings.

Socket description

Jumbo 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: J4
Base pins: -
Nominal heater voltage: 2.5 V
Nominal heater current: 10 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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1000 V
Rectifier nominal output current: 2 A
Rectifier peak forward current: 6 A
Rectifier warm-up time: 300 s

Rectifier promoted fields mapped from the printed maximum ratings; representative row used for repeated identical anode sections where applicable.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1000 V
Rectifier nominal output current: 2 A
Rectifier peak forward current: 6 A
Rectifier warm-up time: 300 s

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Maximum Output Voltage
250 V
Maximum Average Output Current
2 A
Maximum Peak Output Current
6 A

SECTION 2

Rectifier

Other

Maximum Output Voltage
250 V
Maximum Average Output Current
2 A
Maximum Peak Output Current
6 A