It provides Class 10 tripping for motors drawing between 3.5 and 5.0 A full-load current — the adjustable current response value is set via a dial on the front face. The thermal bimetallic element tracks motor heating directly, so it protects against sustained overcurrents without nuisance tripping on brief starting inrush, as long as the start time stays within the Class 10 curve.
The adjustable range of 3.5...5.0 A is the first thing to check against your motor nameplate FLA. If your motor draws 4.2 A, this relay lands in the middle of its range — that is the sweet spot for accurate thermal protection. If your motor has a long acceleration time (high-inertia loads like centrifuges), you would need a Class 20 or 30 relay instead. The 6 kV surge voltage resistance means it handles typical industrial transient spikes without flashover. Operating frequency is 50...60 Hz — fine for any standard mains supply worldwide. Power dissipation is 6.1 W typical total, with 2.2 W per pole and 6.6 W at rated current in hot operating state. That is modest heat for a panel — no forced cooling needed in a standard enclosure, but keep the 6 mm side spacing to grounded parts for natural convection.
This relay is designed for stand-alone installation — it does not snap directly onto a contactor coil assembly. The Size S00 designation means it shares the same mounting footprint as S00 contactors, so it fits neatly into a standard control panel layout. Dimensions are 89 mm high, 45 mm wide, 80 mm deep. Wire termination accepts 2× (0.5...1.5 mm²) solid or 2× (0.75...2.5 mm²) stranded for the main circuit, and 2× (20...16) AWG or 2× (20...18) AWG for auxiliary contacts. Tightening torque for main contact screws is 0.8...1.2 N·m — use a torque screwdriver to avoid terminal damage. The electrical connectors for the main circuit are arranged top and bottom, which keeps wiring straight and avoids crossing phases.
Environmental limits and approvals
Relative humidity during operation is 0...90 %. Shock resistance is 8 g for 11 ms per IEC 60068-2-27. Maximum installation altitude is 2 000 m above sea level — above that, derate the current-carrying capacity per the manufacturer's guidelines. The relay carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance for that cut-off.