It handles motor power up to 5.5 kW at 400...440 V AC 50/60 Hz, 5.5 kW at 500 V AC, and 9 kW at 690 V AC. The 24 V AC control circuit powers the unit, which offers manual reset and a suite of protection functions including overload, short-circuit, phase failure, phase imbalance, and earth fault protection.
Rated for utilisation categories AC-41, AC-43, and AC-44 per IEC 60947-6-2 — AC-44 covers the toughest motor switching duty (frequent starts, plugging, inching), so this unit is built for demanding cyclic loads, not just simple on-off. The tripping threshold is 14.2 x Ir +/- 20 %, meaning the magnetic short-circuit release kicks in at roughly 14 times the set full-load current, giving good selectivity headroom downstream. The unit's 45 mm width and 66 mm height plug into the TeSys U power base (LUB12, LUB32, or LUB38) — no need to gut the whole line; it drops into the existing footprint.
Heat dissipation is 2 W with the LUB12 base, 3 W with LUB32 or LUB38 — negligible for thermal budgeting in a ventilated panel.