12-4

12.6Volt Operating Heater, 4-Second Nominal Time Delay, Normally Open (NO) Hermetically Sealed Thermal Time Delay Relay, utilizing a 12.6V linear direct-current or alternating-current heating core optimized to connect cleanly with standard 12V vehicular distribution tracks, battery storage networks, and step-down utility lines while maintaining continuous linear tracking limits, housed in a standard clear glass tube envelope.