5SY8663-7 SIEMENS

The 5SY8663-7 is a miniature circuit breaker (MCB) manufactured by Siemens, designed for reliable circuit protection in residential, commercial, and industrial applications. This MCB is a 3P+N (three-pole plus neutral) device, meaning it protects three phase lines and a neutral line. It has a C-characteristic tripping curve, making it suitable for circuits with moderate inrush currents, such as lighting and general-purpose loads. The device is rated for a maximum voltage of 400V AC, ensuring compatibility with standard European power systems. With a breaking capacity of 25kA according to EN 60947-2, it can safely interrupt high fault currents, preventing damage to equipment and minimizing downtime. Its compact design, with a depth (D) of 70mm, allows for easy installation in distribution boards and consumer units. The 5SY8663-7 provides overload and short-circuit protection, safeguarding electrical circuits from damage due to excessive current flow. It is commonly used in distribution boards to protect final circuits. This MCB offers a reliable and space-saving solution for circuit protection needs. It has a current rating of 63A.