Data set 01
1940 RCA
Published operating points and test conditions from this source.
SECTION 1
SurgeProtector
Other
Maximum Cathode Current
30 mA
Characteristic
BreakdownVoltage
160 V
Tube Voltage Drop
120 V
Specialized - Switching Tube ·SurgeProtector
1B25
Gas-discharge protective tube that breaks down near 160 V to protect circuits against excessive voltage.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- -
Description
Gas-discharge protective tube that breaks down near 160 V to protect circuits against excessive voltage.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- 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
1 physical section, each with unique specifications.
Section 1
SurgeProtector
X-ray radiationInterelectrode capacitances
- Max cathode current
- 30 mA
- Regulator starting voltage
- 160 V
- Regulator maintaining voltage
- 120 V
Published maximum ratings and electrical characteristics promoted from the approved source.
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.