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3D22 / CV2851 thyratron

Size This valve measures 110x5mm overall and has a 7 pin base.


Heater voltage 6.3V
Heater current 2.6A
Max PIV 1300V
Max peak forward anode voltage 650V
Max peak grid1 voltage -200V
Max peak grid2 voltage -100V
Max grid1 DC current 5mA
Max cathode DC current 750mA
Max peak cathode current 6A
Max heater-cathode voltage (heater -ve to cathode) 100V
Max grid series resistance 2M ohms
Max cathode heating time 30 secs
Max ambient temperature range -75 to +90 C


Pin Function
1 Heater
2 Grid 2
3 Cathode
4 Grid 1
5 Grid 2
6 Anode
7 Heater


Top quarter view Bottom quarter view