4013A

Vacuum micro-fuse designed as a protective interruption device. It opens an electrical circuit under specified overload conditions while maintaining controlled insulation in a sealed vacuum envelope.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

Nickel-wire vacuum micro fuse intended to open on currents in the 18 to 25 mA range.

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: -
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

ProtectiveFuse

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published ratings and characteristics promoted where applicable; additional published data retained as parameters.

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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

ProtectiveFuse

Characteristics

Fuse blow current range
18 to 25 mA
Resistance
45 to 55 ohm

Other

Safe current for 1 hour
11 mA