Overcurrent circuit breaker, 6kA BKJ63Nd series 4P 10A B characteristic BKJ63Nd 4P B10 BKJ63ND 4P B10

Overcurrent circuit breaker BKJ63Nd is a safety element protecting the electrical installation against the effects of overloads and short circuits. Model BKJ63Nd 4P with a rated current of 10A and B characteristic, is perfect for both home installations and public utility facilities. It provides reliable protection of electrical circuits, and its compact dimensions allow for easy mounting on a standard 35mm DIN rail.

Product features and application

BKJ63Nd series circuit breakers are characterized by high resistance to environmental conditions and long mechanical (20,000 cycles) and electrical (10,000 cycles) life. A wide range of rated currents (from 1A to 63A) allows you to match the circuit breaker to specific installation needs. The B characteristic ensures fast tripping in the event of a short circuit, while allowing for short-term overloads without unnecessary tripping of the circuit – which is particularly important for devices with induction motors. This circuit breaker is designed to protect wires and electrical devices against damage caused by overload or short circuit. It can be used in circuits with a rated voltage of up to 415V AC and 48V DC.

Advantages and benefits

• Versatility: Possibility of use in various types of installations thanks to a wide range of rated currents and availability of 1P, 1P+N, 2P, 3P, 3P+N and 4P versions.
• Reliability: Compliance with IEC 60898-1 and IEC 60947-2 standards guarantees high quality and safety of use.
• Easy installation: Compact dimensions (17.8mm per pole) and the possibility of mounting on a standard DIN rail facilitate installation and servicing.
• Durability: High number of mechanical and electrical operating cycles ensures long device life.
• Safety: B characteristic provides effective protection against the effects of short circuits and overloads, minimizing the risk of damage to the installation and equipment.
• Universal connection: Available option of connecting wires with lugs or screws provides flexibility during installation.
• Wide operating temperature range: The circuit breaker retains its properties in the temperature range from -5°C to +40°C.

Construction and parameters

The BKJ63Nd circuit breaker has a housing made of high-quality plastic, which provides electrical insulation and mechanical resistance. The use of a two-chamber construction increases safety by separating the working elements from the operating elements. Wires with a cross-section of up to 25mm² can be connected using lugs or screws – which gives a lot of freedom during installation. This circuit breaker has a short-circuit breaking capacity of up to 6kA at a rated voltage of 240/415VAC, which guarantees effective protection of the installation in the event of a failure. It is worth paying attention to the influence of ambient temperature on the rated current of the circuit breaker – according to IEC 60898-1, appropriate thermal correction factors should be taken into account.