1pc HF165FD12HY1STF 012VDC 4pin 30A277VAC Relay Overview A compact, current electromechanical relay designed for reliable switching of AC circuits. The HF165FD12HY1STF features a 12V DC coil, a 4pin footprint for straightforward wiring, and contacts rated for 30A at 277VAC. Key benefits current capacity: Rated 30A at 277VAC to handle heavy AC loads without frequent replacement. Reliable control with a 12V DC coil: Works with common 12V control systems and controllers. Spaceefficient 4pin design: Simplifies installation in control panels or on PCBs where footprint and wiring simplicity matter. Durable switching solution: Suitable for frequent on/off cycles in lighting, HVAC, and industrial control circuits when used within specified ratings. Easy replacement and integration: Model and rating information match common relay sockets and control modules requiring a 12V coil and AC current rating. Important attributes Model: HF165FD12HY1STF Coil voltage: 12V DC Pin count: 4pin configuration for simple connections Contact rating: 30A at 277VAC Function: Electromechanical relay for switching AC loads via a 12V DC control signal Performance notes Use within the specified voltage and current ratings to ensure long service life. For inductive loads, add appropriate suppression or snubber circuits to protect contacts and the control circuit. Verify socket or PCB footprint compatibility before installation. Practical applications Commercial lighting control: Switch LED or fluorescent lighting circuits up to 277VAC in office or retail fixtures. HVAC and building systems: Control fans, compressors, and other equipment in thermostatic or building automation systems that use 12V DC control signals. Industrial control panels: Integrate into automation systems for switching heaters, solenoids, or other current AC loads within the relay rating. What you get One HF165FD12HY1STF relay with 12V DC coil and 4pin configuration rated 30A 277VAC, ready for integration or replacement in compatible control systems.