The Siemens SENTRON 5SM9335-0KK is a 3-pole residual current device (RC unit electronic) rated 63 A with 30 mA sensitivity, type AC, for 400 V AC at 50 Hz. Its instantaneous design means it trips without intentional delay — suited for direct fault protection where selectivity with upstream devices is not required. The 30 mA threshold covers personnel protection in standard industrial and commercial circuits per IEC 60364.
Integration Note
The 3-pole format occupies three modular width units (approx. 54 mm) in the distribution board. Power dissipation is 0.8 W per pole in hot operating state — factor this into enclosure thermal calculations when grouping multiple devices.