It mounts directly onto a S2-size contactor (the company-specific combination size), so it integrates as a single assembly on the DIN rail — no separate bracket or wiring between the contactor and the relay. The adjustable current response range of 28 to 40 A covers a common band for medium-horsepower three-phase motors. The rated operational current of 40 A is the top of the adjustment range, meaning you size the motor full-load current within that window and set the dial to match. If your motor has a longer acceleration time (high-inertia loads like fans or centrifuges), Class 10 may be too fast and cause nuisance tripping; you would then step to a Class 20 or 30 relay.
Rated operating voltage of 690 V AC at 50-60 Hz covers the common 400 V and 480 V three-phase systems with headroom for 690 V applications. Main circuit terminals accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded, or 2× (18 to 3 AWG) and 1× (18 to 1 AWG). Tightening torque for main contacts is 3 to 5 N·m — a standard screwdriver range, no special tooling required. That heat must be dissipated within the enclosure — account for it in your thermal budget, especially if the relay is mounted in a sealed cabinet with other heat sources. Operating temperature range of -20 to +70 °C suits most indoor industrial environments; storage and transport range of -55 to +80 °C covers cold-weather shipping and hot warehouse storage. Relative humidity tolerance of 0 to 100 % means condensation is not a problem for the relay itself.
Fastening method is contactor mounting — the relay clips directly onto the S2 contactor. Mounting position allows rotation of ±135° on a vertical surface and tilting of ±45° front-to-back, giving flexibility in tight panels. Required spacing to grounded parts at the side is 6 mm. Dimensions are 118 mm depth, 55 mm width, 105 mm height. The 118 mm depth means the assembly protrudes into the enclosure — verify your enclosure depth if using a shallow box. Auxiliary circuit terminals accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) or 2× (20 to 16 AWG) and 2× (18 to 14 AWG).
The relay carries a substance prohibition date of 07/01/2006, aligning with RoHS compliance for the European directive. Surge voltage resistance is rated at 6 kV, and shock resistance per IEC 60068-2-27 is 8g for 10 ms. Installation altitude is limited to 2000 m above sea level.