The IDEC Relays GT5Y-2SN3A200 Timer Blade Plug-In is a reliable 240V timing relay designed to control sequence operations in HVAC systems. It works by providing adjustable time-delay functions that ensure components such as compressors, fans, and heating elements activate in the correct order. https://www.partshnc.com/gt5y-2sn3a200-idec-relays-timer-blade-plug-in-240v