Built-in phase failure detection is standard — if one phase drops, the breaker trips on the unbalance, protecting the motor from single-phasing.
The S0 frame footprint is 45 mm wide by 97 mm deep by 97 mm tall — fits a standard 45 mm module slot on the rail. Mounting position is any orientation. Main circuit terminals accept solid or stranded copper: 2x 1–2.5 mm² or 2x 2.5–10 mm². Screw terminals with M4 thread on the main contacts. Use a Pozidriv size 2 screwdriver tip with a shaft diameter of 5 to 6 mm.
Lifecycle stage is current production. Switching frequency at AC-3 duty (motor loads) is rated at 15 operations per hour maximum, same for AC-3e. That's typical for a motor-protection breaker — it's not a contactor meant for high-cycle jogging; it's a protective device that sees occasional switching during fault or maintenance.