Selectivity and Coordination Headroom
For the site electrical engineer building a selective coordination study: the ENW13212 carries a 50 kA Icw (short-time withstand current for 1 s at 220-440 V AC) and a 75 kA Icm (short-circuit making capacity). The 12 kV Uimp impulse withstand voltage (per IEC 60947-2) confirms insulation coordination at pollution degree 3 (IEC 60664-1) — typical for industrial panels where conductive dust or condensation is present. Maximum breaking time is 35 ms; maximum closing response time is 70 ms. These figures anchor the time-current curve for downstream device coordination.
Fixed-mount on a rail base plate, with rear connection and a 70 mm connection pitch without spreader. The 276 mm width × 301 mm height × 196 mm depth footprint fits standard distribution panel compartments. The mechanical durability is 20,000 cycles with maintenance or 10,000 without, per IEC 60947-2; electrical durability is 5,000 cycles at 440 V AC without maintenance.