Specialized - Switching Tube ·RelayControlSwitch
Cold-cathode gas-filled triode, printed G240/2D, for higher-power relay and counter applications. Its discharge provides heaterless electronic control.
Cold-cathode gas-filled triode, printed as G240/2D, designed for higher-power relay and counter applications.
International Octal
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Published ratings/characteristics promoted where applicable.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Control-gap breakdown voltage
75 V
Control-gap maintaining voltage
65 V
Main-gap minimum breakdown voltage
240 V
Main-gap maintaining voltage
90 V
Transfer current at 200 V anode
10 uA
Optimum operating current
20 mA
Maximum peak cathode current
50 mA
Data set 02
Published operating points and test conditions from this source.
Main Gap Breakdown Voltage Minimum
230 V
Main Gap Maintaining Voltage Minimum
90 V
Main Gap Maintaining Voltage Maximum
110 V
Control Gap Breakdown Voltage Nominal
75 V
Control Gap Breakdown Voltage Maximum
90 V
Main Gap Deionisation Time Nominal
8 ms
Recommended Operating Current
20 mA
Maximum Peak Cathode Current
50 mA
Maximum Average/Direct Cathode Current
30 mA