Parameters Parameter Specification Product Range Acti 9 iST Series Device Type Miniature Circuit Breaker (MCB) Number of Poles 4 Poles (4P) Rated Current (In) 20 A (Note: "iST 20" denotes the series and frame size; the actual current rating is selected from a range. Common ratings include 6A, 10A, 16A, 20A, 25A, 32A, etc. You must specify the exact ampere rating, e.g., iST20B 20A 4P) Tripping Characteristic B Curve: For general residential/light commercial circuits (sensitive to small overloads). C Curve: For commercial/industrial circuits with moderate inrush currents (motors, transformers). (Specify B or C when ordering) Rated Operational Voltage (Ue) 230/400V AC, 50/60 Hz Rated Insulation Voltage (Ui) 500V AC Rated Impulse Withstand Voltage (Uimp) 6 kV Breaking Capacity (Icn) 20 kA at 230/400V AC according to IEC 60898-1 Service Short-Circuit Capacity (Ics) 100% of Icn (20 kA) Standards & Certifications IEC/EN 60898-1 (Domestic & Similar). May also comply with IEC/EN 60947-2 (Industrial) for certain references. CE marked. Electrical Endurance ≥ 20,000 operating cycles Mechanical Endurance ≥ 20,000 operating cycles Terminals Rigid or flexible copper cable. Front-access terminals with captive screws. Torque 2.5 N·m (for main terminals) Mounting DIN rail EN 60715 (35 mm symmetrical) Ambient Temperature -25°C to +60°C (for calibration) Visual Trip Indicator Yes. Green = ON/Reset, Red = Tripped (Fault). Pollution Degree 2 Installation Class Class III (Distribution Board Mounting) Dimensions (W x H x D) Approx. 72 mm x 90 mm x 75 mm (4 modules wide) Weight Approx. 0.4 kg