Overcurrent circuit breaker, 6kA BKJ63Nd series 1P 4A characteristic D BKJ63Nd 1P D4 BKJ63ND 1P D4

Overcurrent circuit breaker BKJ63Nd is a safety element protecting the electrical installation against overloads and short circuits. This model, with a rated current of 4A and D characteristic, finds application in both domestic and industrial installations where protection against sudden load surges is required.

Characteristics and Application

BKJ63Nd series circuit breakers are characterized by high reliability and durability, confirmed by compliance with IEC 60898-1 and IEC 60947-2 standards. The D characteristic means that the circuit breaker allows for short-term overloads, which is particularly important when operating devices with high inrush current – such as motors or transformers. This minimizes the risk of unnecessary tripping of the circuit during normal operation of these devices. This circuit breaker is designed for mounting on a 35mm DIN rail.

Construction and Parameters

The construction of the circuit breaker is based on a thermal-magnetic mechanism, ensuring a quick and effective response to irregularities in the circuit. The rated short-circuit breaking capacity is 6kA at 240/415V AC, which guarantees the safety of the installation in the event of serious disturbances. This circuit breaker is designed to operate at temperatures from -5°C to +40°C. The possibility of connecting wires with a cross-section of up to 25mm² provides flexibility when selecting appropriate cables.

The rated current of 4A makes this circuit breaker perfect for circuits with lower power consumption. The D characteristic provides tolerance to short-term overloads, which is particularly important for devices equipped with motors or transformers. The short-circuit breaking capacity of 6kA guarantees a high level of installation safety. The rated voltage of 240/415V AC ensures versatility in various types of electrical installations. The wide operating temperature range from -5°C to +40°C allows the circuit breaker to be used in various environmental conditions. Mounting on a 35mm DIN rail facilitates and speeds up the installation and replacement process. The possibility of connecting wires with a cross-section of up to 25mm² provides flexibility when choosing appropriate power cables.

It is worth remembering that proper selection of an overcurrent circuit breaker is crucial to ensure the safety and reliability of the electrical installation. Choosing a D characteristic avoids unnecessary tripping caused by short-term current surges during the start-up of high-power devices, while ensuring effective protection against overloads and short circuits.