B4021

Miniature gas-filled cold-cathode Nixie numerical readout tube. Burroughs data specify a 120 V maximum ionization voltage and 120 V recommended minimum supply, with operation through an external series current-limiting resistor.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SK116
Base pins: -
Nominal heater: -

Description

B4021 is a gas-filled cold-cathode Nixie numerical/readout device. The shared catalog identifies it with the B4021 electrical family, using a maximum ionization voltage of 120 V and a recommended minimum supply of 120 V.

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: -
Socket code: SK116
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: 2 mA
Regulator minimum current: 0.7 mA
Regulator maximum current: 1.2 mA
Regulator starting voltage: 120 V

Gas-filled cold-cathode Nixie numerical-readout tube, Miniature size.

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

1961 Nixie Burroughs

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

Ionization Voltage Maximum
120 V
Supply Voltage Minimum
120 V
Catalog minimum supply voltage
Cathode Current Peak
2 mA
Cathode Current Average
1 mA
Individual Cathode Wattage Maximum
0.2 W
Test Supply Voltage
120 V
Test Series Resistor
20 kOhm
Display Size Class
Miniature
Numeral Height
0.305 in
Recommended Socket
SK116
Recommended Supply Voltage
120 V
Series resistor 20 kOhm
Recommended Series Resistor
20 kOhm
Supply voltage 120 V

Characteristic

Cathode Current Minimum
0.7 mA
Cathode Current Maximum
1.2 mA

Environmental

Shock
55 G
Vibration
10 G
60 cps
Operating Temperature Range
-65 to +70 C
Altitude
70000 ft

Data set 02

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

Ionization voltage maximum
120 V
Supply voltage minimum
120 V
Cathode current maximum
2 mA
Supply voltage
120 V
TestCircuit
Series resistance
20000 Ohm
TestCircuit
Cathode current minimum
0.7 mA
Test
Cathode current maximum
1.4 mA
Test
Ambient temperature minimum
-65 degC
Ambient temperature maximum
85 degC
Altitude maximum
70000 ft

Data set 03

196X Burroughs Nixie

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

Ionization voltage
120 V
Absolute rating; maximum
Minimum supply voltage
120 V
Absolute rating; minimum recommended supply
Cathode current
2 mA
Peak
Cathode current
1 mA
Average
Individual cathode dissipation
0.2 W
Maximum
Anode supply voltage
120 V
BasicCircuit test condition
Anode series resistor
20 kOhm
BasicCircuit test condition
Cathode current
0.7 to 1.2 mA
BasicCircuit test condition
Numeral height
0.305 in
Miniature
Recommended anode series resistor
20 kOhm
Anode supply 120 V
Pre-bias voltage
50 to 75 V
Referenced to on cathode