Overcurrent circuit breaker, 6kA BKJ63Nd series 4P 20A characteristic D BKJ63Nd 4P D20 BKJ63ND 4P D20

Overcurrent circuit breaker BKJ63Nd is a protective element for electrical installations against overloads and short circuits. It belongs to the BKJ63N series, designed by LS Electric, and is characterized by high reliability and durability. This four-pole (4P) circuit breaker with a rated current of 20A and characteristic D is designed to protect circuits with receivers with high starting current, such as motors or transformers.

Protection and application

BKJ63Nd circuit breakers provide effective protection in AC installations with a rated voltage of 240/415V (depending on the number of poles). Characteristic D means a delayed tripping time, which allows for trouble-free starting of devices generating short-term current surges. This minimizes the risk of unnecessary tripping of the circuit during normal operation. A wide range of rated currents (from 1A to 63A) and the ability to choose the characteristic (B, C, D) allow you to adapt the circuit breaker to specific application needs.

Construction and mounting

The BKJ63Nd circuit breaker is mounted on a standard 35mm DIN rail. It has both screw and lug terminals, which facilitates the connection of wires with a cross-section of up to 25mm². The width of the circuit breaker is 17.8mm per pole, which allows for efficient use of space in the switchgear cabinet. Made of high-quality materials, it ensures long-lasting and trouble-free operation – it withstands up to 10,000 electrical and 20,000 mechanical on/off cycles. Operation at temperatures from -5°C to +40°C guarantees reliability in typical operating conditions.

Parameters and compliance with standards

The circuit breaker 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 240/415VAC, which ensures effective protection of the installation in the event of a short circuit. The IP20 degree of protection protects against touching live parts inside the housing.