Overcurrent circuit breaker, 6kA BKJ63Nd series 3P 50A characteristic D BKJ63Nd 3P D50 BKJ63ND 3P D50

Overcurrent circuit breakers BKJ63Nd – reliable installation protection

This three-phase overcurrent circuit breaker BKJ63Nd with a rated current of 50A and characteristic D is a key element of every safe and efficient electrical installation. Designed to protect against overloads and short circuits, it ensures stable operation of circuits in demanding conditions. This circuit breaker, mounted on a standard 35mm DIN rail, is ideal for both professional installers and end-users looking for reliable protection.

Functionality and application

BKJ63Nd circuit breakers are characterized by high efficiency in disconnecting the current in the event of a failure, minimizing the risk of damage to equipment and fires. Characteristic D means that the circuit breaker reacts with a delay to short-term current surges, which is particularly important when handling devices with motors or other pulsed loads – such as pumps or compressors. This avoids unnecessary shutdowns caused by momentary overloads. Application in industry, commercial and residential construction guarantees safety and continuity of power supply.

Key features and benefits

• High breaking capacity: 6kA at 240/415VAC – provides effective protection even in the event of high short-circuit currents.
• Characteristic D: Ideal for circuits with pulsed loads, minimizes the risk of false tripping. Allows the motor-driven devices to be started without unnecessarily interrupting the power supply.
• DIN rail mounting: Quick and easy mounting on a standard 35mm DIN rail – saves time and installation costs.
• Wide range of rated voltages: 240VAC (1P), 415VAC (2-4P) – versatility of application in various installations.
• Durable construction: Made of high-quality materials, guarantees long life and reliable operation. Withstands up to 10,000 electrical and 20,000 mechanical operating cycles.
• Compliance with standards: Meets the requirements of IEC 60898-1 and IEC 60947-2 standards – confirmation of safety and product quality.
• Possibility of connecting wires up to 25mm²: Provides flexibility in choosing wire cross-sections.

Technical parameters in practice

The BKJ63Nd circuit breaker has been designed with ease of use and reliability in mind. Its compact dimensions (17.8mm wide per pole) allow for efficient use of space in the distribution board. The IP20 degree of protection provides protection against accidental contact, and the operating temperature from -5°C to +40°C enables its use in various environmental conditions. There are various ways to connect wires - both with lugs and screws, which increases the flexibility of the installation.