Overcurrent switch, 6kA BKJ63Nd series 3P 3A characteristic C BKJ63Nd 3P C3 BKJ63ND 3P C3

Overcurrent circuit breaker BKJ63Nd is a reliable safety element protecting electrical installations from the effects of overloads and short circuits. Designed for mounting on a 35mm DIN rail, it provides effective protection in circuits with a voltage of up to 415V AC. This three-pole (3P) circuit breaker with a rated current of 3A and C characteristic is perfect for both domestic and industrial installations.

Protection and application

BKJ63Nd series circuit breakers, thanks to their design and characteristics, are ideal for protecting circuits with a mixed nature – both those with resistive loads (e.g., heating) and inductive loads (e.g., motors). The C characteristic allows for short-term exceeding of the rated current without unnecessary tripping, which is especially important when starting devices with electric motors or other pulsed loads. This ensures stable operation of the installation and minimizes the risk of false alarms.

Construction and parameters

The BKJ63Nd circuit breaker has been designed with durability and reliability in mind. Its compact dimensions (17.8mm wide per pole) allow for efficient use of space in the switchgear cabinet. Made of high-quality materials, it guarantees a long mechanical life (20,000 cycles) and electrical life (10,000 cycles). Adapted to work at temperatures from -5°C to +40°C, it meets the requirements of IEC 60898-1 and IEC 60947-2 standards, which confirms its safety and compliance with applicable standards. The rated short-circuit breaking capacity is 6kA at 240/415V AC, which provides effective protection in the event of serious disturbances in the network. The possibility of connecting wires with a cross-section of up to 25mm² using lug or screw terminals provides flexibility during installation.