DLS15

Vacuum thermal-delay switch using a four-volt heater. Thermal expansion changes the internal contact state after a controlled delay for sequencing and protection.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: IO
Base pins: 4
Nominal heater: 4 V / 750 mA

Description

Vacuum thermal delay switch.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 4
Nominal heater voltage: 4 V
Nominal heater current: 750 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

ThermalDelaySwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this 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.

Data set 01

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

ThermalDelaySwitch

Characteristic

Minimum delay time
30 s
Maximum delay time
90 s

Other

Maximum switch current at 240 V
5 A
Maximum switch current at 1000 V
100 mA

Data set 02

1961 Associated Electrical Industries

Published operating points and test conditions from this source.

SECTION 1

ThermalDelaySwitch

Characteristics

MinimumDelayTime
30 s
MaximumDelayTime
90 s

Other

MaximumMeanCurrentLowVoltage
5 A
240V
MaximumMeanCurrentHighVoltage
100 mA
1000V