The Littelfuse ORB120A25 Time-Delay Relay is a 120VAC, adjustable delay-on-break control relay designed for HVAC electrical and automation applications. It operates by energizing its output when the initiating switch closes and maintaining the relay connection for a preset period after the switch opens. Its adjustable time delay ranges from 3 to 300 seconds. Suitable for air condition... https://www.partshnc.com/orb120a25-littelfuse-time-delay-relay