Overcurrent switch, 6kA BKJ63Nd series 2P 40A characteristic B BKJ63Nd 2P B40 BKJ63ND 2P B40

Overcurrent switch – reliable protection for your installation

This two-pole overcurrent switch from the BKJ63Nd series, with a rated current of 40A and B characteristic, is a key element ensuring safety in every electrical installation. Designed for both domestic and industrial applications, it effectively protects circuits against overloads and short circuits. Its compact dimensions allow for easy mounting in distribution boards.

Construction and application

The BKJ63Nd switch is designed for mounting on a 35mm DIN rail. Its construction based on solid materials guarantees long-lasting and trouble-free operation. The B characteristic means that the switch reacts quickly to an increase in short-circuit current, but is more tolerant to short-term current surges during the starting of devices with motors or other inductive loads. This minimizes the risk of unnecessary tripping of the circuit. These types of switches are used to protect lighting circuits, socket circuits and electrical devices with lower power.

Key features and benefits

• High protection efficiency: Provides effective protection against overload and short circuit – like most switches in this class.
• B characteristic: Ideal for circuits with devices with high starting current, e.g. motors. Allows them to start without unnecessary tripping of the switch.
• Wide rated voltage range: Suitable for operation in 240/415VAC installations (depending on the number of poles).
• Durable construction: Made of high-quality materials, which translates into long life and reliable operation.
• Easy installation: Mounting on a standard 35mm DIN rail simplifies and speeds up installation.
• Compliance with standards: Meets the requirements of IEC 60898-1 and IEC 60947-2 standards, which guarantees safety of use.
• High electrical endurance: Withstands up to 10,000 switching cycles under load.
• Possibility of using accessories: Compatible with additional accessories (AX, AL, SHT, OVT, UVT) extending its functionality.

Additional information: BKJ63Nd switches have a short-circuit breaking capacity of up to 6kA at 240/415VAC, which provides effective protection in the event of serious disturbances in the electrical network. This avoids damage to the installation and devices connected to it.