ZM1138L

Cold-cathode Nixie indicator cross-referenced to RFT Z5740M, a left-oriented display variant in the ZM113x family.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Wire lead
Socket code: B13D
Base pins: -
Nominal heater: -

Description

ZM1138L is a cold-cathode Nixie indicator listed in the supplied German comparison catalog as comparable to RFT type Z5740M. The referenced RFT table publishes a striking value of 150 V, a maintaining/glow value of 140 V, an extinction value of 120 V, along with cathode-current, display, environmental, and mechanical data. The catalog explicitly cautions that comparable tubes are not necessarily identical, so these mapped RFT values are retained as comparison data rather than asserted as exact original-manufacturer ratings.

Socket description

13-pin subminiature Nixie wire-lead base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: Wire lead
Socket code: B13D
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Wire lead - 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: 1.5 A
Regulator maximum current: 2.5 A
Regulator starting voltage: 150 V
Regulator maintaining voltage: 140 V

Cold-cathode display section; promoted starting/maintaining voltages and current range are published for comparable RFT type Z5740M. Comparable RFT mapping: Z5740M; values are comparison-catalog data, not asserted identical original ratings.

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

1971 Nixie RFT

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

Comparable RFT Type
Z5740M
Catalog cross-reference; comparable types are not guaranteed identical; ComparableRFT=Z5740M
Minimum Operating Supply Voltage
170 V
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Cathode Current Minimum
1.5 mA
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Cathode Current Maximum
2.5 mA
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Peak Cathode Current
12 mA
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Ambient Temperature Minimum
-50 °C
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Ambient Temperature Maximum
70 °C
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Displayed Symbols
0 to 9; decimal point left; +
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Reading Direction
side
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Symbol Height
13 mm
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Maximum Viewing Distance
8 m
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Mounting Orientation
Wire 7 facing front
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Maximum Bulb Height
47.6 mm
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Maximum Bulb Diameter
19 mm
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M

Characteristic

Anode Striking Voltage
150 V
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Anode Maintaining Voltage
140 V
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M
Anode Extinction Voltage
120 V
Published for comparable RFT type Z5740M; ComparableRFT=Z5740M