Z502S

Cold-cathode bidirectional decade selector for electronic counting, sequencing, and selection circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

Z502S is a cold-cathode bi-directional decade selector, classified as Nixie for this batch. The supplied datasheet was reviewed for operating conditions, ratings, and display/counting characteristics.

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

Nixie

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Cold-cathode gas-filled bidirectional decade counter/selector tube with ten main cathodes.

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

Nixie

Characteristic

Anode maintaining voltage at 300 uA
186 to 196 V

Other

Typical anode current
340 uA
Counting
Maximum voltage between non-anode electrodes
- to 140 V
Maximum main/auxiliary cathode current
- to 550 uA
Number of main cathodes
10 count

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

Maximum counting rate
4 kHz
Minimum input-signal interval
250 µs
Maintaining anode voltage
191 V
Ik=300uA