HF105F5012D1HS 12VDC 4pin power relay, rated 30A at 240VAC. This compact control relay delivers current switching driven by a 12VDC coil, allowing lowvoltage control circuits to safely operate voltage AC loads. Key benefits current switching: rated for up to 30A at 240VAC, suitable for demanding AC loads without overstressing control electronics. Lowvoltage control: 12VDC coil lets you drive the relay directly from common 12V control systems and automotivestyle control circuits. Simple integration: 4pin configuration and standard relay form factor make it easy to install in panels, sockets, or custom wiring harnesses. Reliable operation: designed for repeatable switching tasks where isolation between control and load is required. Key attributes Model: HF105F5012D1HS Coil voltage: 12VDC Pin count: 4pin Contact rating: 30A at 240VAC Functionality: electromechanical relay for isolating and switching AC loads using a DC control signal Performance focus: supports current AC loads while being controlled by a lowvoltage DC signal Typical applications Industrial control panels: switch motors, heaters, or large lighting banks from a 12V control system while keeping control circuitry isolated from the AC load. Home automation and appliance control: control heavyduty lighting, pumps, or HVAC equipment that require higher AC current capacity. Automotive and mobile equipment (12V control systems): use in auxiliary circuits where a 12V trigger must switch highervoltage AC loads through appropriate inverters or isolated systems. Installation and usage notes Confirm wiring and pin assignments before connecting to avoid miswiring. Deenergize circuits before installation or maintenance. Match the relay rating to your load. The 30A/240VAC rating indicates capability for substantial AC loads; ensure contactors or protection devices meet local electrical codes. Use appropriate sockets, mounting hardware, and protective fusing as required for your application. This HF105F5012D1HS relay is a practical choice when you need a reliable, 12VDCdriven relay capable of switching up to 30A at 240VAC in a straightforward 4pin package.