Active production, pre-assembled for star-delta duty
The 3RA2444-8XF32-1NB3: It ships with two 3RT2045-1NB30 contactors (main and delta legs) and one 3RT2035-1NB30 (star leg), plus the 3RA2943-2C RS assembly kit. The varistor surge suppressor is integrated into the assembly, not an add-on module.
Motor power and mounting — what fits where
Rated 55 kW at 400 V and 90 kW at 690 V in AC-3 duty, this Size S3 assembly handles the star-to-delta transition for motors up to those power levels. Clearance requirements: 10 mm upwards, forwards, downwards, and to the side; 0 mm backwards — the back of the assembly can sit flush against the panel backplane. Dimensions are 244 mm deep, 220 mm wide, 180 mm tall — confirm the panel cutout and door clearance before committing the BOM line.
Termination and compliance details
All power and control terminals are screw-type — main circuit, magnet coil, and auxiliary/control circuit. The coil accepts 20–33 V DC with a closing power of 154 W. Auxiliary contacts: 3 instantaneous, no auxiliary switch extension fitted as standard. Substance compliance date is 03/01/2017 — the assembly meets RoHS and REACH requirements as of that date. No UL or CSA listing is recorded in the spec set, so verify with the local Siemens office if the site requires UL 508 listing. Recommended upstream fusing for type of coordination 2: gG NH 3NA, DIAZED 5SB, or NEOZED 5SE at 160 A.