This relay mounts directly onto a contactor (contactor mounting), so the kit is complete: no separate bracket or wiring between the relay and contactor main poles.
The S3 frame size handles main circuit conductors up to 70 mm² stranded or 50 mm² fine-stranded, with screw-type terminals on both the main and auxiliary circuits. That means this relay can terminate motor leads up to about 1/0 AWG without needing adapter lugs — a solid fit for a 30–50 hp motor at 400 V. The auxiliary contacts are rated for 1 A at 24 V, 3 A at 120 V, and 2 A at 230 V, which covers most PLC input or contactor coil feedback circuits. Power dissipation is 4.5 W per pole, so in a multi-relay enclosure you need to account for 13.5 W total heat from the main poles — factor that into your panel cooling budget.
This relay mounts directly onto a SIRIUS S3 contactor — no DIN rail required for the relay itself, though the contactor typically snaps onto a DIN rail. Clearance requirements: 0 mm upwards, forwards, backwards, and downwards, with 6 mm to the side. That means you can pack relays side-by-side with no vertical gap, but leave 6 mm between adjacent units for heat dissipation. The front face is IP20, so finger-safe once the panel door is closed, but not washdown-rated — keep it inside the enclosure.
It handles 100 % relative humidity (condensing), so it's fine in non-climate-controlled enclosures in humid plants. Shock resistance is 8g for 10 ms — adequate for most industrial machinery but not for high-shock applications like forging presses. Surge voltage resistance is 8 kV, which meets IEC 60947-1 overvoltage category III for 400 V systems.