Siemens 5SU14441RC63 Specifications, Features & Compatibility Guide

The 100mA sensitivity is optimal for fire protection because it detects low-level leakage that standard 63A thermal trips ignore but could still lead to carbon tracking. A 10kA breaking capacity is essential for main incomer positioning to safely manage high prospective fault currents available at the service entry. Utilizing a 4P configuration with a switched neutral ensures that the entire circuit is isolated during a fault, preventing dangerous potential between neutral and earth.