Rated for 690 V, it carries power ratings of 37 kW at 400 V, 45 kW at 500 V, and 55 kW at 690 V — these are the AC-3e motor-switching values that govern real motor sizing. The note "for message 'Tripped'" on the listing signals this variant includes an auxiliary contact that changes state on trip, so a PLC or HMI can log the fault without a separate signal conditioner.
Mounts directly to the contactor via the M6 main contact fastening — no DIN rail bracket needed. Screw-type terminals on the main circuit accept 2× (0.5 to 2.5 mm²) solid or stranded conductors; use a Pozidriv PZ 2 bit with a 5–6 mm shaft diameter for the terminal screws. Dimensions are 55 mm wide by 90 mm high by 105 mm deep — the S2 frame size fits alongside SIRIUS contactors in a standard 400 mm deep enclosure with room for gland plates and cable ducts. Temperature compensation is active from -40 to +60 °C, so the trip curve stays accurate even in a hot panel near a motor starter cluster.
Compliance documentation is in place: the substance prohibitance date of 10/15/2014 aligns with RoHS and REACH requirements for the EU market. The SIRIUS series carries UL, CSA, and CE approvals as standard for the product family, so the 3RU2136-4KD0 is accepted in panels destined for North America and Europe without additional certification work.