UA1

Rare-gas-filled low-voltage surge arrester for protecting low-current installations and cables against lightning, atmospheric overvoltages, and accidental contact with power lines.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Rare-gas-filled low-voltage surge arrester for protecting low-current installations and cables against lightning, atmospheric overvoltages, and contact with power lines.

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

No fixed ratings are recorded for this section.

Published electrical characteristics preserved in parameter rows; regulator-specific fields promoted where applicable.

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

1962 Cerberus

Published operating points and test conditions from this source.

SECTION 1

SurgeProtector

Other

Static breakdown voltage
220 to 270 V
Dynamic breakdown voltage
- to 800 V
Pulse 2 kV - 1/50
Surge current
2 kA
Pulse 15/50
Load current
10 A
1 s

Characteristics

Glow sustaining voltage
-
Insulation resistance at 60 V DC
1000 Mohm