Overcurrent circuit breaker, 6kA BKJ63Nd series 4P 40A B characteristic BKJ63Nd 4P B40 BKJ63ND 4P B40

Overcurrent circuit breaker BKJ63Nd is a safety element protecting electrical installations against overloads and short circuits. Designed for mounting on a 35mm DIN rail, it provides reliable protection in circuits with a rated voltage of up to 415V AC. This 4-pole model with a rated current of 40A features a B-curve, which means a faster response to current increase – an ideal solution for circuits with devices with high inrush current, such as motors.

Designed for durability and safety, the BKJ63Nd circuit breaker has a short-circuit breaking capacity of up to 6kA, which guarantees effective disconnection of the circuit in the event of a failure. The construction with double terminals (screw and lug) facilitates the connection of wires with a cross-section of up to 25mm², providing flexibility during installation. The circuit breaker meets the requirements of IEC 60898-1 and IEC 60947-2 standards, confirming its compliance with European safety standards.

• Versatility: Available in 1P, 1P+N, 2P, 3P, 3P+N and 4P versions, allowing adaptation to various installation configurations.
• Wide range of rated currents: From 1A to 63A – the ability to choose the appropriate protection for each circuit.
• Durability: Withstands up to 20,000 mechanical cycles and 10,000 electrical cycles, ensuring long-lasting and trouble-free operation.
• Safety: Short-circuit breaking capacity up to 6kA effectively protects the installation from the effects of short circuits.
• Easy installation: Mounting on a standard 35mm DIN rail and double terminals facilitate and speed up installation.
• B-curve: Fast response to current increase – ideal for circuits with devices with high inrush current (e.g. motors).

BKJ63Nd circuit breakers are a reliable choice for both professional installers and end-users looking for effective protection of their electrical installation. Their solid construction and compliance with standards ensure peace of mind and safety of use for many years. In addition, the wide range of available models allows for precise adaptation to the individual needs of each installation.