Overcurrent circuit breaker, 6kA BKJ63Nd series 4P 3A B characteristic BKJ63Nd 4P B3 BKJ63ND 4P B3

Overcurrent circuit breaker BKJ63Nd is a reliable safety element protecting electrical installations against the effects of overloads and short circuits. Designed for use in both residential and industrial buildings, it provides effective protection for wires and connected devices. The 4P model with a rated current of 3A and B characteristic is perfect for circuits with devices with moderate inrush current.

Application and functionality

BKJ63Nd series circuit breakers, such as this 4-pole model, are a key element of every electrical installation. Their main task is to automatically disconnect the circuit in the event of a dangerous increase in current – caused by overload or short circuit. This minimizes the risk of damage to wires, devices and fire. The B characteristic means that the circuit breaker reacts quickly to short-term current surges, but is resistant to temporary loads, e.g. when starting electric motors.

Construction and mounting

The BKJ63Nd circuit breaker is characterized by a compact design and easy mounting on a standard 35mm DIN rail. It has screw terminals allowing the connection of wires with a cross-section of up to 25mm². Solid construction guarantees long-lasting and trouble-free operation. This circuit breaker is designed to operate in AC and DC circuits, offering versatility of application.

Parameters and characteristic features

• Rated current: 3A – matched to protect circuits with moderate current consumption.
• Number of poles: 4P – provides full protection for a three-phase circuit or several independent single-phase circuits.
• Tripping characteristic: B – ideal for protection against overloads and short circuits in circuits with devices with moderate inrush current (e.g. lighting, sockets).
• Breaking capacity: 6kA at 240/415VAC – a high value guaranteeing effective interruption of the electric arc during a short circuit.
• Compliance with standards: IEC 60898-1, IEC 60947-2 – confirms compliance with strict safety and quality requirements.
• Width: 17.8mm per pole - compact dimensions allow for efficient use of space in the switchgear.

This circuit breaker is a solid solution for every installer and user looking for reliable protection of the electrical installation.