The Siemens 5SU1424-8RC32 is a 2-pole RCBO (residual current circuit breaker with overcurrent protection) rated at 32 A, with a D tripping characteristic, Type A residual current sensitivity at 100 mA, in a 4-module width.
The 32 A rating handles the continuous load; the D curve avoids nuisance tripping on startup. Type A residual current detection covers pulsating DC fault currents (rectified waveforms from electronics), not just pure AC — so it fits circuits with VFDs, UPS, or switched-mode power supplies downstream. The 100 mA sensitivity is a delayed or selective earth-fault threshold, often chosen for fire protection or to coordinate with downstream 30 mA RCDs.