Data set 01
1947 Westinghouse
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Characteristic
PickupVoltageAverage
12 V
Rectifier - Half Wave ·Rectifier
5B21
Directly heated gas-filled half-wave rectifier for low-voltage power conversion, using gas-assisted conduction for efficient high-current industrial and electronic DC supplies.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- EDISON
- Base pins
- -
- Nominal heater
- 2.5 V / 25 A
Description
Gas-filled directly heated rectifier for low-voltage power conversion.
Socket description
Edison screw base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- EDISON
- Base pins
- -
- Nominal heater voltage
- 2.5 V
- Nominal heater current
- 25 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
- 225 V
Gas-filled rectifier 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.