Relays Function Provide electrical isolation between control signals and load circuits Allow a low power control system to switch higher power devices safely Compatibility Available in common configurations such as SPST, SPDT, and DPDT Suitable for PCB mounting, socket mounting, or panel mounting depending on model Designed to accommodate a range of coil voltages and load types used in automation and electronics Size and materials Compact form factor for use in tight spaces Durable housing with robust insulation Contacts made from copper or silver alloy for reliable switching Encapsulated or sealed options available for dust and moisture resistance Performance switching reliability and long service life when driven correctly Fast response with stable operation across a wide temperature range Variants optimized for standard or harsh environment applications 23 use scenarios Industrial automation Control PLC outputs to motors, solenoids, or indicator lamps Isolate the control logic from power loads to reduce noise and improve safety Building automation Switch lighting, HVAC actuators, or ventilation equipment from a central controller Enable remote or scheduled control while protecting control electronics from load disturbances Automotive and mobile electronics Gate power to sensors, actuators, or auxiliary devices from a vehicle network or portable testing rig Provide dependable switching in compact automotive enclosures How to select Choose the contact configuration that matches the load and switching needs Match the coil voltage to the control signal and ensure the load current and voltage are within the relay rating Consider the mounting style and environmental protection (standard vs sealed) for your enclosure and operating conditions