Overcurrent circuit breaker, 6kA BKJ63Nd series 1P 40A B characteristic BKJ63Nd 1P B40 BKJ63ND 1P B40

Overcurrent circuit breaker BKJ63Nd is a protective element for electrical installations against overloads and short circuits. This model, with a rated current of 40A and B characteristic, finds application in both domestic and industrial installations. Its compact size and DIN 35mm rail mounting facilitate installation and integration with existing systems.

Characteristics and Application

BKJ63Nd series circuit breakers are characterized by high reliability and long service life – they withstand up to 20,000 mechanical cycles. The B characteristic means that the circuit breaker reacts quickly to an increase in short-circuit current, but is more tolerant to short-term overloads, which is important when connecting devices with motors or other pulse loads. Application in lighting circuits, socket circuits and protecting electrical devices makes it a universal solution for a wide range of applications.

Construction and Parameters

The BKJ63Nd circuit breaker is designed in accordance with IEC 60898-1 and IEC 60947-2 standards, which guarantees its safety and compliance with industry requirements. It is adapted to operate at temperatures from -5°C to +40°C, allowing its use in various environmental conditions. The rated impulse voltage is 4kV, and the short-circuit breaking capacity is 6kA at 240/415VAC – this ensures effective protection of the installation in the event of a failure. Various types of terminals (screw or lug) are available, which facilitates the connection of wires with a cross-section of up to 25mm².

Additionally, it is worth mentioning the possibility of expanding the system with accessories such as status indicators (SHT) or overvoltage protection devices (OVT/UVT). This allows you to adapt the circuit breaker to the specific needs of a given installation.