Overcurrent circuit breaker, 6kA BKJ63Nd series 3P 40A characteristic D BKJ63Nd 3P D40 BKJ63ND 3P D40

Overcurrent circuit breaker BKJ63Nd is a protective element for electrical installations against the effects of overloads and short circuits. This model, with a rated current of 40A and characteristic D, is used in both building and industrial installations. It replaced the BKN series, offering improved technical parameters, including separate terminals for wires and busbars – which simplifies installation and ensures a secure connection.

This three-pole (3P) circuit breaker is designed to protect electrical circuits with a voltage of 415V AC. Characteristic D provides a delayed response to short-term current surges, which is particularly important when protecting loads with motors or other devices generating high inrush currents. The short-circuit breaking capacity of 6kA guarantees effective disconnection of the circuit in the event of a failure.

• Versatile application: ideal for securing installations in residential, commercial and industrial construction.
• Characteristic D: provides protection against overloads and short circuits, minimizing the risk of false tripping caused by short-term current surges.
• High reliability: meets the requirements of IEC 60898-1 and IEC 60947-2 standards, confirming its quality and safety.
• Easy installation: possibility of mounting on a standard 35mm DIN rail and the use of double terminals (screw and lug) facilitate installation and connection of wires with a cross-section of up to 25mm².
• Durable construction: withstands up to 10,000 electrical and 20,000 mechanical cycles, ensuring long-lasting and trouble-free operation.

BKJ63Nd circuit breakers are characterized by compact dimensions (17.8 mm wide per pole), which allows for efficient use of space in the switchgear cabinet. A wide range of available rated currents (up to 63A) and different characteristics (B, C, D) allow you to select the appropriate circuit breaker for specific application needs. These circuit breakers are a solid choice for installers looking for reliable and safe solutions in the field of overcurrent protection.