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Diode (NOT rectifier) ·Diode

413A

Inert-gas-filled cold-cathode two-electrode tube designed for message-register, switching, pulse-counting, and control circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
4
Nominal heater
-

Description

Two-electrode inert-gas-filled cold-cathode tube for message-register, switching, pulse-counting, and control circuits.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UX4
Base pins
4
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

Diode

X-ray radiationInterelectrode capacitances
Max cathode current
200 mA

Promoted fields mapped from printed maximum-rating and characteristic headings; additional published values preserved in parameter rows.

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

2026 Western Electric 400s

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Forward or Inverse Average Cathode Current

    20 milliamperes

    Forward or Inverse Average Cathode Current . . . . 20 200 milliamperes

  • incde Voltage Dron, Forward or Inverse . +

    55 volts

    incde Voltage Dron, Forward or Inverse . + . . 55 €2 75 volts

  • Ncte

    2 volts

    Ncte 2: Witw 15 volts overvoltage {15 volts ebove anode breskdown voltage)

  • )

    40 MILLIAMPERES

    ) 40 80 120 €0 200 ANGDE CURRENT IN MILLIAMPERES DC