3-14

3Volt Operating Heater, 14-Second Nominal Time Delay, Normally Open (NO) Hermetically Sealed Thermal Time Delay Relay, featuring an extended 14-second thermal delay sweep within the identical 3V low-voltage heating line configuration. It is explicitly binned to execute precise cathode pre-heating delays for legacy vacuum tubes, safeguarding delicate high-voltage plate grids from destructive early-conduction arcing faults, housed in a standard clear glass tube envelope.