ZM1120

Front-viewed gas-filled cold-cathode Nixie displaying digits 0–9 with approximately 7.8 mm character height.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Special 11-pin
Socket code: SK116
Base pins: 11
Nominal heater: -

Description

The ZM1120 is a gas-filled cold-cathode Nixie display tube. The catalog shows 0 to 9 with a front viewing arrangement and a character height of 7.8 mm. Its ignition voltage is 170 V, extinction voltage is about 115 V, and normal glow voltage is about 145 V. The source is French-language material translated to English for this record.

Socket description

SK-116 11-contact miniature Nixie socket family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: Special 11-pin
Socket code: SK116
Base pins: 11
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Special 11-pin - 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

Regulator minimum current: 700 mA
Regulator maximum current: 1.4 A
Regulator starting voltage: 170 V
Regulator maintaining voltage: 145 V

Single cold-cathode display section. Nixie-specific electrical ratings and operating data are retained in TUBE_SECTION_PARAMETER.

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

1966 Nixie Telefunken

Published operating points and test conditions from this source.

SECTION 1

Nixie

Characteristics

Ignition voltage
- to 170 V
Measured/operating data; maximum stated
Burning voltage
145 V
At cathode current 1 mA
Expected life
30000 h
Changing display at about 1 mA per digit; ambient temperature down to about -10 degC
Digit height
7.8 mm
Visible digit height
Maximum weight
5 g
Mechanical data

Other

Cathode current
0.7 to 1.4 mA
Measured and operating range
Minimum supply voltage
170 V
Absolute minimum supply requirement
Pulse cathode current
- to 1.5 mA
Maximum; pulse duration <=20 ms
Envelope temperature
-50 to 70 degC
Absolute range
Cathode-to-cathode bias voltage
40 to 120 V
For non-burning cathodes when required
Recommended off-cathode bias
80 V
Recommended when non-burning cathodes require positive bias
Recommended cathode current
1 mA
Approximate per displayed digit

Data set 02

1973 Nixie Siemens

Published operating points and test conditions from this source.

SECTION 1

Nixie

Characteristics

Ignition voltage
170 V
Maximum/typical threshold shown in source table
Operating glow voltage
145 V
Approximate service voltage
Extinction voltage
115 V
Source table value
Nominal cathode current
1 mA
Main symbol/digit

Other

Maximum supply voltage
170 V
Absolute limit table
Cathode current
0.7 to 1.4 mA
Main symbol/digit continuous range
Maximum peak cathode current
1.5 mA
Main symbol/digit
Envelope temperature minimum
-20 degC
Operating envelope temperature range
Envelope temperature maximum
70 degC
Operating envelope temperature range
Display characters
0 to 9
Translated from French source
Display orientation
front
Viewing orientation
Character height
7.8 mm
Display geometry
Maximum tube height
23 mm
Mechanical dimension
Maximum tube width/diameter
16.5 mm
Mechanical dimension as printed