The motor power assignments are given per voltage: 1.5 kW at 400 V, 2.2 kW at 500 V, and 4 kW at 690 V — these are the full-load motor sizes the relay can protect at those line voltages. The integrated auxiliary switch carries a "for message 'Tripped'" designation, meaning the N/C contact signals a trip condition. Its switching capacity is rated across multiple voltages: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V — all AC values for the signal circuit. At 60 V and 125 V DC it handles 0.3 A and 0.22 A respectively, so it can drive a PLC input or a panel lamp directly. The relay compensates for ambient temperature changes from -40 to +60 °C, so it won't nuisance-trip in a hot panel or a cold warehouse.
Mounts directly onto the contactor — the fastening method is "contactor mounting" — so it snaps onto the SIRIUS 3RT2 contactor of matching S00 frame size without extra brackets. Mounting position is any, which helps in tight enclosures. The main circuit uses screw-type terminals accepting 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded wire. A Pozidriv PZ 2 screwdriver with a 5 to 6 mm shaft diameter is specified for the terminals.