What it is and what it does
The C123160BS is a Schneider Electric ComPacT NSXm 160NA three-pole switch disconnector, rated for distribution duty. It's built to EN/IEC 60947-1 and 60947-3, and carries a full isolation rating — meaning you can trust the visible contact position indicator to confirm the circuit is dead for safe maintenance. Rated operational current sits at 160 A in AC-22 (resistive/mixed loads) and 100 A in AC-23 (motor switching with high inrush). That 690 V AC operational voltage covers most 400 V three-phase panels with headroom.
Mounting and integration
Fixed mount on 35 mm symmetrical DIN rail or a backplate — your choice. At 81 mm wide, 137 mm tall, and 80 mm deep, it fits a standard panel cutout, and the 27 mm connection pitch keeps wiring neat on the rail. Terminals accept 2.5 to 120 mm² crimp lugs (copper or aluminium), or busbar connectors.
Ratings that matter in the panel
Rated impulse withstand voltage (Uimp) is 8 kV, and the rated insulation voltage (Ui) is 800 V — solid for 400 V line-to-line systems with decent surge margins. Short-time withstand (Icw) is 1500 A for 1 s, which covers downstream fault clearing coordination. The short-circuit making capacity (Icm) is 2.13 kA for the switch-disconnector alone, but jumps to 150 kA when backed by an upstream breaker — that's the real-world coordination figure for selectivity studies. Pollution degree 3 per IEC 60664-1 means it's rated for industrial environments with conductive dust or condensation. IP40 enclosure keeps fingers and tools out; IK07 impact rating handles a 2 J knock during panel work. Ambient operating range is -25 to 70 °C, storage from -50 to 85 °C. Class II double-insulated — no earth connection needed on the mounting plate.