Overcurrent circuit breaker, 6kA BKJ63Nd series 1P 25A characteristic D BKJ63Nd 1P D25 BKJ63ND 1P D25

Overcurrent circuit breaker from the BKJ63Nd series is a reliable safety element protecting electrical installations against overloads and short circuits. Designed for mounting on a 35mm DIN rail, it provides effective protection in circuits with a voltage of 240/415V AC (depending on the number of poles). This single-pole circuit breaker with a rated current of 25A and D characteristic is perfect for applications requiring high resistance to surge currents, such as protecting devices with electric motors or transformers.

Features and application

BKJ63Nd circuit breakers are characterized by high mechanical durability (20,000 cycles) and electrical durability (10,000 cycles), which guarantees long-term and trouble-free operation. A wide range of operating temperatures (-5°C to +40°C) allows their use in various environmental conditions. Thanks to the compact dimensions (17.8mm wide per pole), these circuit breakers take up little space in the switchboard, making installation and organization easier. The ability to connect wires with a cross-section of up to 25mm² using screw terminals or lugs provides flexibility and convenience during installation.

Parameters and benefits

The D characteristic of the circuit breaker means a delayed response to short-term overloads, which is particularly important when protecting circuits with loads generating high inrush currents during start-up – typical for motors, pumps or refrigeration units. The breaking capacity of up to 6kA ensures effective disconnection of the circuit in the event of a short circuit, minimizing the risk of equipment damage and fire. Compliance with IEC 60898-1 and IEC 60947-2 standards confirms the safety and reliability of the device. Made of high-quality materials, it guarantees durability and resistance to operating conditions. Mounting on a standard DIN rail facilitates integration with existing distribution systems.