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Nixie ·Nixie

ZM1550

Philips cold-cathode segmented gas-discharge indicator with approximately 15 mm character height, designed to form numerical or symbolic characters from luminous segments.

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

Description

Philips cold-cathode gas-filled indicator tube for numerical, sign, or segmented display service.

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
Max cathode current
3 mA
Regulator starting voltage
165 V
Regulator maintaining voltage
120 V

Electrical section values extracted from published ratings and characteristics.

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Nixie

Characteristic

  • Character height

    15 mm

    Character height 15 mm

  • Decade pitch (also for stacked tubes)

    0.7 mm

    Decade pitch (also for stacked tubes) 17,78 mm (0,7 in)

  • Ignition voltage, first ignition, 25 Ix

    165 V

    Ignition voltage, first ignition, 25 Ix Vign < 165 V

  • Ignition voltage, subsequent ignitions within 10 ms

    145 ms

    Ignition voltage, subsequent ignitions within 10 ms Vign < 145 V

  • Primed ignition voltage

    140 V

    Primed ignition voltage Vign pr 5 140 V

  • Extinction voltage

    120 V

    Extinction voltage Vext 120 V

  • Luminous intensity per segment

    10 mA

    Luminous intensity per segment 10 mcd/mA

  • * Bulb temperatures above 70 oC result in changes incolour.

    70 oC

    * Bulb temperatures above 70 oC result in changes incolour.

  • ** Bulb temperatures below 10 oC result in a reduced life expectancy and changes in characteristics.

    10 oC

    ** Bulb temperatures below 10 oC result in a reduced life expectancy and changes in characteristics.

  • Shock: 50 g (peak), 1000 shocks in one of the three positions of the tube

    1000

    Shock: 50 g (peak), 1000 shocks in one of the three positions of the tube

  • Vibration: (-11 2,5 g (peakl, —50 Hz for 2 hours

    2 Hz

    Vibration: (-11 2,5 g (peakl, —50 Hz for 2 hours

  • current is 10%higher than the initial min. cover current.

    10

    current is 10%higher than the initial min. cover current.

  • Fig. 4 Maintaining voltage as a function of segment current.

    4 a

    Fig. 4 Maintaining voltage as a function of segment current.

  • luminous intensity (mcd 1

    1

    luminous intensity (mcd 1

  • Fig. 5 Luminous intensity as a function of d.c. segment current.

    5 a

    Fig. 5 Luminous intensity as a function of d.c. segment current.

  • Fig. 6 Relative luminous intensity as a function of the direction of viewing.

    6 a

    Fig. 6 Relative luminous intensity as a function of the direction of viewing.

Other

  • Ignition delay, first ignition, Vba = 165 V, 25 Ix

    1 V

    Ignition delay, first ignition, Vba = 165 V, 25 Ix Td typ. < 1 s

  • Cathode current, d.c.

    0.25 mA

    Cathode current, d.c. max. 0,7 max. 0,25 mA

  • Cathode current, peak

    1.1 mA

    Cathode current, peak max. 3 max. 1,1 mA

  • Cathode current, mean Tav =max. 25 ms

    0.2 ms

    Cathode current, mean Tav =max. 25 ms max. 0,5 max. 0,2 mA

  • Ambient temperature

    100 oC

    Ambient temperature max. 100 oC

  • Anode supply

    165 V

    Anode supply Vba min. 165 V

  • Screen supply voltage IRscreen C 10 kSZ)

    10 V

    Screen supply voltage IRscreen C 10 kSZ) V bs

  • Life expectancy > 50 000 h at max. cathode current

    0 h

    Life expectancy > 50 000 h at max. cathode current