The interrupting rating is 100 kA at both 240 V and 400 V. At 690 V the breaking capacity drops to 2 kA, and at 500 V to 3 kA. The rated operational voltage spans 20 to 690 V, covering most low-voltage industrial systems from control transformers up to 690 V line supplies. The -20 °C lower limit means it is not rated for freezer or arctic outdoor applications without a heated enclosure.
The 45 mm width (three module spaces) and 75 mm depth fit standard distribution boards and motor control center buckets. Clearance requirements: 20 mm upwards, 20 mm downwards, 9 mm to the side, and zero forwards or backwards. That 9 mm side clearance is tight — adjacent devices must not overhang or you lose access to the screw terminals. Screw-type terminals on the main circuit accept two conductors: 2×(0.5...1.5 mm²) or 2×(0.75...2.5 mm²) solid or stranded. The M3 screw size is standard for this current class; use a PZ1 bit and torque to 0.8–1.2 Nm per Siemens installation instructions.
For BOM freeze or long-term project planning, the current status means you can specify this part without an obsolescence risk in the near term. The SIRIUS platform is a mature, widely deployed family, so field-proven reliability is well documented.