It provides motor and transformer protection, with a thermal adjustment range of 0.63...1 A, so the 1 A setting is the top end of the adjustment band — set it to match the motor full-load current, not the breaker's own rating. Breaking capacity is 100 kA Icu across the full voltage range (220...690 V AC, 50/60 Hz), certified to IEC 60947-2.
The 45 mm width and 89 mm height keep the panel fill factor tight — three of these side by side take 135 mm of rail. Spring terminals accept 1...6 mm² solid or 1.5...4 mm² flexible with cable end, so it wires directly into the motor branch circuit without lug adaptors. IP20 finger-safe enclosure (IK04 impact rating) suits it for enclosed panels, not washdown zones. Ambient operating range -20...60 °C, storage -40...80 °C, with 2.5 W power dissipation per pole — factor that into enclosure thermal calculations if you're packing several breakers in a small cabinet.
Rated operational voltage (Ue) 690 V AC, insulation voltage (Ui) 690 V AC, impulse withstand (Uimp) 6 kV. Suitability for isolation per IEC 60947-1 — it can serve as a disconnecting means in the motor circuit. Electrical durability 100,000 cycles at AC-3/AC-3e at 415 V; mechanical durability 100,000 cycles. Magnetic trip fixed at 22 A, so short-circuit protection is independent of the thermal dial. Motor power ratings span 0.09 kW at 230 V up to 0.55 kW at 690 V (high peak current motor protection), and up to 1 kW for transformer protection at 690 V. The 1 A thermal setting covers small motors and control transformers in the sub-1 kW range.