Overcurrent circuit breaker, 6kA BKJ63Nd series 2P 50A characteristic D BKJ63Nd 2P D50 BKJ63ND 2P D50

Overcurrent circuit breaker BKJ63Nd 2P 50A is a reliable safety element protecting electrical installations against the effects of overloads and short circuits. Designed for mounting on a 35mm DIN rail, it provides effective protection in circuits with a rated voltage of up to 415VAC. Characteristic D makes this circuit breaker particularly recommended for protecting devices with high starting current, such as electric motors or transformers.

Protection and application

This two-pole (2P) circuit breaker with a rated current of 50A is designed to ensure the safety and continuity of electrical installations. Thanks to its high short-circuit breaking capacity – up to 6kA – it effectively protects against damage caused by sudden current surges. BKJ63Nd series circuit breakers are used in residential, commercial buildings and industrial facilities where high reliability and protection against overloads are required.

Construction features and mounting

The BKJ63Nd circuit breaker is characterized by a compact design – the width of a single pole is only 17.8mm – which allows for efficient use of space in the distribution board. Mounting is done by snapping onto a standard 35mm DIN rail, which greatly simplifies and speeds up installation. Screw terminals allow connection of wires with a cross-section of up to 25mm², ensuring a solid and secure connection. Operation at temperatures from -5°C to +40°C guarantees stable operation in various environmental conditions. The circuit breaker meets the requirements of IEC 60898-1 and IEC 60947-2 standards, confirming its compliance with applicable safety standards.

Additionally, BKJ63Nd circuit breakers are characterized by high mechanical durability (20,000 cycles) and electrical durability (10,000 cycles), which translates into a long service life and minimizes the risk of failure. Protection class IP20 provides protection against finger contact and against the ingress of solid objects larger than 12.5 mm.