Z805U

Cold-cathode trigger and pulse switching tube. Gas-discharge operation provides abrupt heaterless switching for pulse and control circuits.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B9A
Base pins: -
Nominal heater: -

Description

Z805U is a Other device in the supplied Amperex literature. Cold-cathode gas-filled trigger tube for pulse/control circuits; source explicitly co-designates the numeric and Z-series type.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
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

TriggerPulseSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Gas-filled cold-cathode relay tube with positive starter voltage for AC or DC service.

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 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

TriggerPulseSwitch

Other

Anode voltage range
250 to 450 V
DC
Peak cathode current
150 mA
Cathode current range
5 to 25 mA
DC
Anode voltage range AC
180 to 275 V
AC

Characteristic

Starter-to-cathode breakdown voltage
137 to 155 V
Anode-to-cathode sustaining voltage
118 to 128 V
Anode-to-cathode breakdown voltage
>500 V
Starter-to-cathode breakdown voltage AC
98 to 110 V
AC

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

TriggerPulseSwitch

Other

AC mains voltage range
180 to 275 V RMS
AC
AC frequency range
10 to 100 Hz
AC
Cathode current range AC
5 to 25 mA
AC
DC anode supply voltage range
250 to 450 V
DC
Cathode current range DC
5 to 25 mA
DC
Peak cathode current
- to 150 mA
AC one cycle

Characteristic

Starter breakdown voltage DC
137 to 155 V
Vba=250-450V
Starter breakdown voltage AC
98 to 110 V RMS
Vba=200-250V RMS
Maximum transfer current at 250 V
- to 100 uA
Starter maintaining voltage at 100 uA
110 V
Anode maintaining voltage at 20 mA
118 to 128 V
Anode-cathode breakdown voltage
475 to - V
Negative anode-cathode breakdown voltage
475 to - V
Minimum