Overcurrent circuit breaker, 6kA BKJ63Nd series 3P 50A characteristic B BKJ63Nd 3P B50 BKJ63ND 3P B50

Overcurrent circuit breakers of the BKJ63Nd series are reliable devices designed to protect electrical circuits against overloads and short circuits. This three-phase breaker with a rated current of 50A and B characteristic provides effective protection for electrical installations in residential and commercial buildings. The modular design and DIN 35mm rail mounting simplify installation and integration with existing systems.

Features and application

The BKJ63Nd 3P B50 breaker is a protective element that automatically interrupts the circuit when a dangerous increase in current is detected. The B characteristic means that the breaker reacts quickly to current increases, which is particularly important in circuits with devices with high starting current, e.g. motors. Use in electrical installations allows for safe operation of devices and minimizes the risk of damage caused by overloads or short circuits. A wide range of rated voltages (240/415Vac) makes it a universal solution for different types of installations.

Product advantages

• High breaking capacity: 6kA at 240/415VAC guarantees effective disconnection of the circuit in the event of a short circuit.
• B characteristic: Provides optimal protection for circuits with devices with high starting current, allowing them to start up smoothly without unnecessary tripping of the breaker.
• DIN rail mounting: Enables quick and easy mounting and dismantling, which translates into time savings during installation and maintenance.
• Durable construction: Made of high-quality materials, which ensures long life and reliable operation. The breaker withstands up to 10,000 electrical and 20,000 mechanical operating cycles.
• Wide operating temperature range: From -5°C to +40°C allows use in various environmental conditions.
• Compliance with standards: Meets the requirements of IEC 60898-1 and IEC 60947-2 standards, which confirms its safety and quality.
• Possibility of connecting wires up to 25mm²: Provides flexibility in choosing wire cross-sections.

Construction and parameters

The BKJ63Nd breaker is characterized by compact dimensions (17.8mm wide per pole) which allows for efficient use of space in the switchgear cabinet. It has lug terminals providing a secure connection with wires up to 25mm² in cross-section. The housing is made of plastic resistant to mechanical damage and external factors (IP20). The breaker is designed to provide easy access to the tripping mechanism during maintenance or repair. The tightening torque of the terminals is 2.0 N.m – it is worth taking this into account during installation to ensure proper electrical contact.