It interrupts 66 kA Icu at 220–440 V AC and 50 kA Icu at 690 V AC, per IEC 60947-2 — the standard that governs low-voltage switchgear and controlgear.
Rated insulation voltage (Ui) is 1000 V AC, and rated operational voltage (Ue) is 690 V AC. Rated impulse withstand voltage (Uimp) is 12 kV. Rated short-time withstand current (Icw) is 65 kA for 1 s at 440 V and 36 kA for 3 s at 440/690 V. Pollution degree 4 per IEC 60664-1 means the breaker is rated for harsh, conductive environments (dust, condensation, partial immersion) — not just clean switchrooms.
Mechanical and mounting
Fixed-mount design on a base plate. Dimensions are 422 mm wide × 352 mm high × 297 mm deep — that depth (297 mm) governs the enclosure depth needed behind the panel door. Connection pitch is 115 mm without a spreader; rear vertical or horizontal bus connections are supported.
Durability and service
Electrical durability at 440 V is 6,000 cycles without maintenance (Category B per IEC 60947-2); at 690 V it drops to 4,000 cycles. Maximum breaking time is 25 ms, closing response time 70 ms — fast enough for most distribution protection schemes.