Hermetically sealed thermostatic time-delay relay tube conforming to MIL-R-19648 and automated control benchmarks, 26-volt AC/DC internal heater path drawing a low continuous holding current, provides an extended 90-second (1.5-minute) fixed operating time-delay interval, features a single-pole single-throw normally closed (SPST-NC) heavy-duty contact configuration rated at 3 amperes continuous load capacity at 115 volts AC, integrated 1500-volt DC dielectric isolation boundary layout separating contacts and heater assemblies, engineered to safeguard complex downstream loads from premature voltage stress spikes during initialization sequences. Unit Sourcing Compatibility: This component came out of heavy marine electronics decks, defense communications cabinets, and industrial staging panels managed under CAGE Code 70563. Exact Industry Equals: Amperite 26N090 and Amperite Co. 26N090