The Schneider Electric C125S3NAFM is a ComPacT NS new generation switch disconnector — 3-pole, fixed-mount, manually operated, rated 1250 A in AC-23A duty across 220–690 V AC. That AC-23A rating covers motor loads with occasional overloads, not just resistive heating; it's the heavy-use curve for switch disconnectors on pumps, compressors, and conveyors.
The short-time withstand (Icw) of 25 kA for 0.5 s tells you it coordinates with upstream breakers or fuses sized to clear a fault within that window; the making capacity of 52 kA at 690 V means it can close onto a bolted fault without welding contacts. Isolation-suitable per IEC 60947-3 (visible break indicator confirms the gap), so it doubles as a lockable disconnect for maintenance.
Fixed-mount, front-front connections with 70 mm pitch — standard for panel feed-through or busbar tap-offs. IK07 impact rating handles accidental tool drops during commissioning.