Motor starter with integrated overload protection
Its thermal protection adjustment range of 6.4...32 A covers a wide band of small-to-mid motor loads, and the adjustable trip class 5...30 lets you match the tripping curve to the motor's starting profile — class 10 for standard start, class 20 for high-inertia fans or conveyors, class 30 for extended ramp times. Rated operational voltage is 1000 V on the power circuit, insulation voltage 1000 V, so it handles 400 V and 480 V three-phase systems without derating. The tripping threshold of 1.25 In per IEC 60947-4-1 means it will not nuisance-trip on normal inrush but clears on sustained overload.
The 6.4...32 A adjustment range is the headline spec for BOM fit — set the dial to match the motor FLA. The thermal overload class (5...30) is the second gate: a compressor with a 10-second start needs class 20, not class 10. The 3-pole design (3 NO power poles) matches standard three-phase motor circuits. Front face IP20 protects against finger contact; the unit mounts under a contactor or on a rail with specific accessories. Tightening torque for the power circuit is 3.1 N.m — a common value for 16 mm² terminals, so no special tooling needed.
Compliance and sourcing posture
Operating temperature range is -5...60 °C, storage -60...80 °C, and it operates at altitudes up to 2000 m without derating. The surge withstand (2 kV common mode, IEC 61000-4-5) and ESD immunity (8 kV, IEC 61000-4-2) mean it holds up in electrically noisy industrial panels.
Mounting options: under a contactor on the plate, or on a DIN rail with specific accessories. The unit is 45 mm wide — one standard DIN module — and 79.9 mm deep, so it fits a shallow enclosure. Control circuit terminals accept 2.5 mm² solid or flexible; power terminals accept 16 mm². The red push-button provides stop and manual reset; the gray dial adjusts the full-load current setting. Associated fuse rating for the signalling circuit is 5 A gG or BS type. Power consumption is 300 mW from the control circuit. The automatic reset time is 1.5...4 minutes after a trip — factor that into your restart sequence if the line must come back automatically.