Overcurrent circuit breaker, 6kA series BKJ63Nd 4P 63A characteristic D BKJ63Nd 4P D63 BKJ63ND 4P D63

Overcurrent circuit breakers of the BKJ63Nd series are components designed to protect electrical installations from the effects of overloads and short circuits. The BKJ63Nd 4P 63A model with D characteristic offers reliable protection in demanding applications. Manufactured by LS Electric, a manufacturer with an established position in the market, this circuit breaker combines compact dimensions with high performance parameters.

Characteristics and application

The BKJ63Nd 4P 63A circuit breaker is characterized by a rated current of 63A and a short-circuit breaking capacity of up to 6kA. The D characteristic provides a delayed response to short-term current surges, making it an ideal choice for circuits powering devices with high inrush currents – such as motors, transformers or heating devices. The four-pole design (4P) allows protection of three-phase circuits or circuits with separation into phases and neutral. Mounting is done on a standard 35mm DIN rail, which facilitates and speeds up installation.

Construction and product features

The BKJ63Nd circuit breaker is made of high-quality materials, ensuring durability and reliable operation. It has a protection degree of IP20, which means protection against touching with a finger and against the ingress of solid objects larger than 12.5 mm. The use of lug terminals (and screw terminals in some versions) allows connection of wires with a cross-section of up to 25mm². Compact dimensions (especially important in limited space in the switchgear cabinet) and aesthetic appearance are additional advantages of this product. The circuit breaker meets the requirements of IEC 60898-1 and IEC 60947-2 standards, which guarantees its safety and compliance with applicable regulations.

Key benefits

• Protection against overloads and short circuits: Ensures safe operation of the electrical installation, protecting it from damage caused by irregularities in the circuit.
• D characteristic: Ideal for protecting devices with high inrush current, minimizing the risk of unnecessary tripping of the circuit breaker during normal operation.
• High short-circuit breaking capacity (6kA): Guarantees effective disconnection of the circuit in the event of a short circuit, protecting devices and the installation from serious damage.
• DIN rail mounting: Facilitates and speeds up installation, reducing labor costs.
• Durable construction: Ensures long-lasting and reliable operation of the circuit breaker even in difficult operating conditions.
• Compliance with standards: Confirms the safety and quality of the product.
• Versatile application: Suitable for protecting various circuits in residential, commercial and industrial buildings.