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Nixie ·Nixie

LC531

Cold-cathode numeric or character indicator cross-referenced to RFT Z573M. German comparison data provide striking, maintaining, extinction, current, and mechanical information for the RFT type while warning that comparable tubes need not be electrically identical.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
Wire lead
Socket code
B13B
Base pins
-
Nominal heater
-

Description

LC531 is a cold-cathode numeric or character indicator tube listed in the supplied German comparison catalog as comparable to RFT type Z573M. The catalog publishes 150 V anode striking, 140 V maintaining, 120 V extinction, a 1.5–2.5 mA cathode-current range, and associated display and mechanical data for that RFT type. The source 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

B13B Nixie 13-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Wire lead
Socket code
B13B
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
Max cathode current
2.5 mA
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 Z573M.

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

    Z573M

    Catalog cross-reference; comparable types are not guaranteed identical

  • Minimum Operating Supply Voltage

    170 V

    Published for comparable RFT type Z573M

  • Cathode Current Minimum

    1.5 mA

    Published for comparable RFT type Z573M

  • Cathode Current Maximum

    2.5 mA

    Published for comparable RFT type Z573M

  • Peak Cathode Current

    12 mA

    Published for comparable RFT type Z573M

  • Ambient Temperature Minimum

    -50 °C

    Published for comparable RFT type Z573M

  • Ambient Temperature Maximum

    70 °C

    Published for comparable RFT type Z573M

  • Displayed Symbols

    0 to 9; decimal point right; +

    Published for comparable RFT type Z573M

  • Reading Direction

    side

    Published for comparable RFT type Z573M

  • Symbol Height

    13 mm

    Published for comparable RFT type Z573M

  • Maximum Viewing Distance

    8 m

    Published for comparable RFT type Z573M

  • Mounting Orientation

    Wire 7 facing front

    Published for comparable RFT type Z573M

  • Maximum Bulb Height

    47.6 mm

    Published for comparable RFT type Z573M

  • Maximum Bulb Diameter

    19 mm

    Published for comparable RFT type Z573M

Characteristic

  • Anode Striking Voltage

    150 V

    Published for comparable RFT type Z573M

  • Anode Maintaining Voltage

    140 V

    Published for comparable RFT type Z573M

  • Anode Extinction Voltage

    120 V

    Published for comparable RFT type Z573M