Technical Features

• Current & Voltage Ratings: Features a 40A rated current ($I_n$) and handles operational voltages up to 400V AC (with a maximum insulation voltage of 440V AC).

• Type K Tripping Characteristic: Designed with a specialized Type K curve, providing a magnetic trip threshold typically between 8 to 12 times the rated current. This prevents nuisance tripping caused by high inrush currents while offering fast response times against short circuits.

• Breaking Capacity: Delivers a rated short-circuit capacity of 6 kA to 10 kA (depending on the voltage standard, conforming to IEC/EN 60898-1 and IEC/EN 60947-2).

• Dual Protection Mechanism: Combines a delayed thermal release for overload protection with an electromechanic mechanism for instant short-circuit isolation.

• Physical Build & Terminals: Utilizes a compact 3-module wide layout (52.5 mm width) designed for standard TH35 DIN rail mounting. Features patented failsafe bi-directional cylinder-lift terminals that securely accommodate cable cross-sections up to 35 mm².

Applications

• Motor & Inductive Loads: Ideal for protecting circuits connected to transformers, control gear, and electric motors where temporary high start-up currents (inrush currents) occur.

• Industrial & Commercial Panels: Widely used in low-voltage switchgear assemblies, electrical automation distribution boards, and industrial machinery control panels.

• HVAC and Commercial Infrastructure: Protects heavy commercial distribution lines, heating systems, and multi-phase equipment setups.

Buyer Guidance & Considerations

• Verify Tripping Curves: Type K curves are intended for inductive loads with high starting surges. Ensure this curve matches your specific load profile, as standard domestic circuits typically require Type B or Type C curves.

• Professional Installation: Because this is a high-amperage 3-phase industrial component, installation should always be performed by a certified electrical professional in compliance with local wiring and safety regulations.

• Compliance: The unit complies with international standards including IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077, making it suitable for globally certified panel builds.