Overcurrent circuit breaker, 6kA BKJ63Nd series 3P 10A characteristic B BKJ63Nd 3P B10 BKJ63ND 3P B10

Overcurrent circuit breaker BKJ63Nd 3P B10 is an element used to protect electrical installations from the effects of overloads and short circuits. It is a three-pole circuit breaker with a rated current of 10A and a B characteristic, which means it provides a quick response to current increase, protecting sensitive electronic devices. Made of high-quality materials, it guarantees reliable operation and long service life.

Protection and application

BKJ63Nd series circuit breakers, including the 3P B10 model, are designed to protect electrical circuits in residential and commercial buildings. Their versatility allows them to be used in various installations, from lighting to electrical outlets. The B characteristic makes them particularly recommended for protecting circuits with devices with high inrush current, such as motors or transformers – they allow for short-term current exceeding without unnecessary tripping. They provide effective protection against overload and short circuit – like most circuit breakers in this class.

Construction features and parameters

The BKJ63Nd circuit breaker is characterized by a compact design and mounting on a standard 35mm DIN rail. It has screw or lug terminals (depending on the version), allowing the connection of wires with a cross-section of up to 25mm². This circuit breaker complies with IEC 60898-1 and IEC 60947-2 standards, confirming its safety and reliability. Its mechanical endurance is 20,000 cycles, and electrical endurance is 10,000 cycles, guaranteeing long-term use. It is adapted to operate at temperatures from -5°C to +40°C.

The short-circuit breaking capacity is 6kA at 240/415VAC, which ensures effective protection of the installation in the event of a short circuit. The protection degree of IP20 means that the device is protected against finger contact, but is not resistant to water ingress. Mounting is done by snapping onto the DIN rail – a simple and quick procedure for the installer.