Z803U

Cold-cathode relay and control switching tube. Available source classification establishes heaterless gas-discharge control service without enough detail for a narrower description.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B7G
Base pins: -
Nominal heater: -

Description

Z803U is a Other device. Gas-filled cold-cathode relay tube with positive starter and anode voltages for sensitive control service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7G
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

RelayControlSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Gas-discharge device.

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

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

RelayControlSwitch

Other

Anode supply voltage range
170 to 290 V
Maximum anode supply voltage
- to 290 V
Maximum peak cathode current
- to 200 mA

Characteristic

Starter breakdown voltage at 280 V anode
128 to 137 V
Starter burning voltage
95 V
Ionization delay at 0.5 V overdrive
2 ms
Ionization delay at 4 V overdrive
0.1 ms
Deionization time at 0-20 mA peak
3.5 ms
Deionization time at 20-60 mA peak
16 ms
Maximum starter-breakdown drift per 2000h
- to 2 %
Absolute

Data set 02

1971 Mullard Gas Filled Tubes

Published operating points and test conditions from this source.

SECTION 1

RelayControlSwitch

Characteristic

Anode maintaining voltage
105 V
Trigger ignition voltage
132 V

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

RelayControlSwitch

Other

Anode maintaining voltage
105 V
Starter ignition voltage minimum
128 V
Starter ignition voltage maximum
137 V
Maximum anode supply voltage
290 V