5U4GA

Directly heated full-wave high-vacuum rectifier of the 5U4 family, providing approximately 250 mA DC output and substantial peak-current capability for power-supply loads.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 5T
Socket code: IO
Base pins: 8
Nominal heater: 5 V / 3 A

Description

Directly heated full-wave high-vacuum rectifier of the 5U4 family with a 250 mA DC output-current rating.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 5T
Socket code: IO
Base pins: 8
Nominal heater voltage: 5 V
Nominal heater current: 3 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5T - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IS	A	IS — Internal Screen EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5T
PIN2F	—	F — Filament EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5T
PIN4P1	A	P — Plate (Anode) EIA chart transcription; manufacturer corroboration pending; preserve source designation P1	Unverified EIA Base Connections, printed page 127, 5T
PIN6P2	A	P — Plate (Anode) EIA chart transcription; manufacturer corroboration pending; preserve source designation P2	Unverified EIA Base Connections, printed page 127, 5T
PIN8F	—	F — Filament EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5T

Section ratings

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1550 V
Rectifier nominal output current: 250 mA
Rectifier peak forward current: 900 mA
Rectifier forward voltage drop: 44 V

Published full-wave rectifier ratings promoted from the printed chart; supply-voltage and voltage-drop test conditions retained as parameters.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1550 V
Rectifier nominal output current: 250 mA
Rectifier peak forward current: 900 mA
Rectifier forward voltage drop: 44 V

Second physical rectifier section; promoted electrical properties populated from 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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Filament/heater voltage
5 V
Published condensed-characteristics chart
Filament/heater current
3 A
Published condensed-characteristics chart
DC output current maximum
250 mA
FullWave
Peak inverse voltage maximum
1550 V
FullWave
RMS supply voltage per plate maximum
450 V
FullWave
Peak current per plate maximum
900 mA
FullWave

Characteristic

Tube voltage drop
44 V
At 225 mA DC

SECTION 2

Rectifier

Other

Filament/heater voltage
5 V
Published condensed-characteristics chart
Filament/heater current
3 A
Published condensed-characteristics chart

Characteristic

Tube voltage drop
44 V
At 225 mA DC