Its thermal adjustment range covers 17 to 23 A, so you set the overload threshold to match the motor's full-load current. The magnetic trip fires at 400 A, handling inrush without nuisance trips on DOL starts. Breaking capacity is 50 kA Icu at 230 V AC, dropping to 15 kA at 415 V and 3 kA at 690 V — enough for most industrial distribution panels downstream of a transformer.
Mounts horizontally or vertically on 35 mm DIN rail — the spring terminals accept 1 to 6 mm² solid or 1.5 to 4 mm² flexible with ferrules. At 45 mm wide, it occupies one standard modular slot, leaving room alongside a contactor for a compact motor starter combination. IP20 finger-safe front, IK04 impact rating.
The 23 A In rating with 17-23 A thermal adjustment lets it protect motors up to 5.5 kW at 230 V or 11 kW at 400 V — common sizes for pumps, fans, and small conveyors. The AC-3 utilisation category confirms it is rated for switching squirrel-cage motors during starting and running, not just isolating under load. Electrical durability is 100,000 cycles under AC-3 at 415 V, matching the mechanical endurance. Power dissipation is 2.5 W per pole, so three poles total 7.5 W — negligible for thermal budgeting inside a standard enclosure.