Overcurrent circuit breaker, 6kA BKJ63Nd series 2P 25A characteristic B BKJ63Nd 2P B25 BKJ63ND 2P B25

Overcurrent circuit breaker BKJ63Nd 2P 25A is a reliable safety element protecting electrical installations from the effects of overloads and short circuits. Designed for mounting on a DIN rail, it is a key component in ensuring safety in residential and commercial buildings. This model, with characteristic B, is perfect for circuits with devices with high inrush current, minimizing the risk of unnecessary tripping.

Characteristics and application

The BKJ63Nd circuit breaker from the BKJ63 series is a device used to protect wires and electrical devices from the effects of overloads and short circuits. Characteristic B means that the circuit breaker reacts quickly to current increase, which is especially important in circuits with inductive or capacitive loads, such as motors or transformers. The rated current of 25A and the two-pole design (2P) make it an ideal solution for protecting typical lighting and socket circuits. Use in 230/400V AC installations ensures versatility and compatibility with most electrical networks.

Construction and mounting

The construction of the circuit breaker is based on solid materials, which guarantees its durability and reliability. Mounting is done on a standard 35mm DIN rail – a quick and intuitive process, appreciated by installers. The circuit breaker has screw terminals and lugs, allowing connection of wires with a cross-section of up to 25mm². The width of the circuit breaker is 17.8mm per pole, which allows for efficient use of space in the switchgear. Additionally, a visual contact position indicator facilitates quick identification of the circuit breaker status – whether it is on or off.

Parameters and compliance with standards

The BKJ63Nd circuit breaker meets the requirements of IEC 60898-1 and IEC 60947-2 standards, confirming its safety and compliance with applicable standards. It has a short-circuit breaking capacity of up to 6kA at 240/415V AC. Operation in ambient temperature from -5°C to +40°C ensures its reliability even in difficult operating conditions. Electrical endurance is 10,000 operating cycles, and mechanical endurance is as much as 20,000 cycles – which proves the long service life of the device. Protection degree IP20 protects against finger contact and protects against the influence of solid bodies larger than 12.5 mm.