2D21 – Electron Tube

The 2D21 is a miniature, 4-electrode, Inert-gas-filled Thyratron with negative control characteristics for use in relay and grid-controlled rectifier applications. Operating characteristics of the tube include a high-control ratio essentially independent of temperature over a wide range, low grid-anode capacitance and very low grid current.

• 0.6A Heater current
• 0.5A Peak cathode current
• 0.1A Average cathode current
• 10MΩ Control-grid circuit resistance
• 8V Anode voltage drop

Applications

Industrial