It's sized for three-phase motors from 0 up to 6 kW depending on supply voltage — covering 100...120 V through 525...690 V three-phase networks. The thermal overload class is field-adjustable from Class 5 to Class 30, so you match the trip curve to the motor's starting duty (pump, fan, compressor). Rated for utilisation categories AC-3 (squirrel-cage motor starting), AC-1 (resistive loads), and AC-4 (plugging/inching), it handles the three common motor-load profiles without derating gymnastics. The tripping threshold is set at 1.25 × In per IEC 60947-4-1, meaning it holds through normal starting inrush but trips on sustained overload.
The motor power range is the headline selector: at 380...440 V three-phase, it covers 0...0.5 kW up to 4...6 kW in six overlapping bands. That means one unit spans from a fractional-horsepower conveyor drive up to a 6 kW pump — the full-load current adjustment (white dial) sets the exact trip point within the band. For a 480...500 V supply, the same unit covers 0...6 kW in the same bands, so it's voltage-flexible across North American and European line voltages. The adjustable thermal overload class (5...30) is the key commissioning parameter. A Class 10 setting suits normal-start motors (standard pumps, fans); Class 20 or 30 handles high-inertia loads (centrifuges, crushers) with longer acceleration times. The automatic reset time is fixed at 1.5...4 minutes, so plan for that cooldown window if the line cycles frequently.
Compliance documentation is well-covered: it carries UL 60947-4-1, CSA C22.2, IEC 60947-4-1, and GB 14048.4 certifications. That means it's accepted in North American (UL/CSA), international (IEC), and Chinese (GB) regulatory jurisdictions — no separate qualification needed for most export panels.
The 3-pole footprint is 45 mm wide × 72.5 mm high × 79.9 mm deep — compact enough for a crowded panel but verify clearance for the red push-button stop and white adjustment dial on the front face. Power circuit terminals accept up to 16 mm² solid or flexible wire (screw clamp, 3.1 N·m torque). Control circuit terminals take 2.5 mm². The associated fuse rating for the signalling circuit is 5 A gG or BS — standard for control transformer protection.