15c19fcd__and_Schematic_Diagram_Symbols__Electronic_Component
[Circuit Symbol] Relay Circuit Symbol [Description] Relay is abbreviated as ‘RY’. This device can easily switch a 230 Volt AC mains circuit. It has three switching stages called Normally Open (NO). Normally Closed (NC), and Common (COM). [Electronic Component] 
Relay
Electronic Circuit Symbols - Components and Schematic Diagram Symbols
Electronic Component