Its AC-2 rating of 22 kW at 400 V covers wound-rotor motor duty, while the AC-4 rating of 41 A at 400 V handles reversing and plugging applications — the high inrush and frequent switching that AC-3 duty does not demand. For reference, the AC-3 rating at 500 V is 30 kW, and at 690 V it is 11.4 kW.
Main current circuit connections use screw-type terminals. The terminal block accepts stranded wire from 2x (0.75... 25 mm²) and solid wire from 2x (0.25... 2.5 mm²). The combined solid-or-stranded range is 2x (0.75... 16 mm²). At 40 °C, the minimum permissible conductor cross-section is 16 mm². The front of the contactor carries an IP20 rating, meaning finger-safe access during panel servicing. The terminal area itself is IP00, so live parts are exposed when the panel door is open — standard for this class.
Switching frequencies: 1 000 cycles/hour at AC-1 maximum, 800 at AC-3, 400 at AC-2, and 300 at AC-4. Dimensions: 112 mm height, 55 mm width, 130 mm depth. Side-by-side mounting is permitted, which simplifies multi-contactor panel layouts.
The contactor carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance from that date. Standard Siemens SIRIUS documentation (declaration of conformity, CE marking) applies per the brand's product line.