It is a current-production part (lifecycle stage: current) from Siemens, meaning it remains in the active catalog and is not subject to a last-time-buy notice.
The S0 frame measures 45 mm wide, 97 mm deep, and 97 mm high — a standard footprint that fits existing S0 backplanes without panel rework. Clearance: 50 mm above and below, 30 mm to the side; no space needed forward or backward. Main circuit terminals accept screw-type connections: 2× (1…2.5 mm²) or 2× (2.5…10 mm²) solid or stranded. Use a Pozidriv size 2 screwdriver, shaft diameter 5–6 mm. The M4 main contact screws are standard for the S0 class.
Ratings and so-what
If one phase drops out, the breaker trips, preventing single-phasing damage to the motor winding. Ground fault detection is not included, so additional protection is needed for earth-fault-sensitive circuits. Rated operational voltage covers 20…690 V AC, covering most low-voltage industrial supplies. The 100 kA breaking capacity holds at 240 V, 400 V, 500 V, and 690 V AC — a flat high-interrupting rating across the voltage range, simplifying coordination studies. The 15 cycles per hour maximum at AC-3 duty (motor switching) sets the mechanical endurance limit for repetitive start-stop applications.