The WE354A is a mercury-vapor thyratron. The 354A was also made with a different shape by Cetron as shown in the second example.
Length = 8.87" Diameter = 3.20" (WE)
Length = 9.50" Diameter = 2.38" (Cetron)
Max voltage = 1500 peak
Max current = 4 amps peak
Fil voltage = 2.5
Fil current = 16 amps GOTO INDEX
