3AT2B

High-voltage vacuum rectifier for television flyback and picture-tube power supplies. Its specialized pulse-voltage construction supports CRT accelerating-voltage generation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B12C
Base pins: 12
Nominal heater: 3.15 V / 220 mA

Description

3AT2B is a Rectifier vacuum tube documented in the RCA Receiving Tube Manual. The supplied excerpt was reviewed for heater or filament data, physical section arrangement, maximum ratings, electrical characteristics, capacitances, and stated application.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B12C
Base pins: 12
Nominal heater voltage: 3.15 V
Nominal heater current: 220 mA
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: 38000 V
Rectifier nominal output current: 1.7 mA
Rectifier peak forward current: 88 mA
Rectifier forward voltage drop: 60 V

PIV total DC+peak; DC component 30000 V.

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

Peak Inverse Voltage DC Component
30000 V
AbsoluteMaximum

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak Plate Current
88 mA
Peak Plate Current 88 mA
Average Plate Current
1.7 mA
Average Plate Current 1.7 mA
Tube Voltage Drop for plate current of
7 mA
Tube Voltage Drop for plate current of 7 mA 60 volts
Peak Plate Current
110 mA
Peak Plate Current 110 mA
Average Plate Current
2.2 mA
Average Plate Current 2.2 mA
Peak inverse plate voltage
38000 V
Published rectifier rating
Average output/plate current
1.7 mA
Published rectifier operating/rating value

Characteristic

Heater voltage
3.65 V
Rated heater/filament condition
Heater current
220 mA
Rated heater/filament condition
Tube voltage drop
60 V
Published instantaneous characteristic