Siemens 5SZ6670 Earth Leakage Circuit Breaker

Siemens 5SZ6670 Earth Leakage Circuit Breaker is a residual-current protective device with a 125 A rating, designed to interrupt circuits when leakage current is detected. The 5SZ6670 designation identifies a Siemens earth-leakage breaker used in low-voltage installations to provide safety against electric shock and equipment damage from ground faults. As an earth leakage breaker, it functions by sensing imbalances between live and neutral conductors and triggering a release when leakage exceeds its configured sensitivity, helping to protect people and property in distribution boards and protection panels. This model is typically installed in commercial or light-industrial electrical systems where reliable leakage protection is required and where Siemens circuitry is used for compatibility with existing panel designs. With its 125 A nominal current rating, it is suited for circuits and loads within that carrying capacity, supporting standard protection practices for leakage current monitoring in practical applications.