This is a single piece solid state relay (SSR) with NC and NO contacts, designed for DC control of single-phase AC loads. It is rated for 10A, 25A or 40A, allowing you to match load requirements precisely. Key features - Models include 10DA and 25DA with NC (Normally Closed) and NO (Normally Open) functionality, suitable as replacement relays. - Solid state design provides reliable, silent switching with no mechanical wear. - DC input control for switching single-phase AC loads, with multiple current ratings available. - Compact size that is compatible with standard heat sinks for effective heat dissipation. - Reliable performance for applications requiring specific NC and NO configurations and defined current ratings. Benefits - Improves system reliability and longevity compared to mechanical relays. - Versatile wiring due to NC and NO options, enabling safe fail-closed or fail-open circuits. - Clear selection of load current (10A, 25A, 40A) to fit different applications. - Heat sink compatibility supports continuous operation without overheating. Applications - Replacing aging mechanical relays in automation panels to switch single-phase AC equipment (motors, heaters, or lighting) via a DC control signal. - Control cabinets requiring NC and NO configurations for safety interlocks and control logic in process automation. - Enclosures where a compact, heat sink friendly SSR is needed to manage dissipation in continuous operation. This device supports a durable, low-noise solution for DC-controlled AC switching with defined current ratings and NC/NO options.