Its interrupting capacity hits 187 kA at 240 VAC — that's the figure that governs fault clearing on high-available-fault panels like main switchboards or transformer secondaries — and still delivers 121 kA at 415 VAC and 75.6 kA at 500 VAC, dropping to 3.7 kA at 690 VAC, so it stays selective with downstream breakers across common industrial voltages. The power loss is 4 W max, negligible for panel thermal budgeting. Dimensions are 105 mm wide × 181 mm high × 86 mm deep — a standard SENTRON 3VA2 footprint that drops into existing 3VA2 panel cutouts without rewiring.
How the ratings govern your panel decision
The 63 A continuous rating is thermally stable across 40–70 °C, so if your panel runs hot at 60 °C, you still get full 63 A — no need to oversize. The auxiliary switch block gives 2 form-C contacts for status, plus dedicated trip and electrical alarm contacts — enough to feed a PLC input or a remote annunciator without extra relays.
The 105 mm width fits a 3-pole slot in a SENTRON distribution board or a custom enclosure. The line protection design means it's optimized for cable and busbar protection rather than motor protection — pair it with a separate overload relay for motor circuits.