Overcurrent circuit breaker, 6kA BKJ63Nd series 3P 20A characteristic D BKJ63Nd 3P D20 BKJ63ND 3P D20

Overcurrent circuit breaker – reliable protection of electrical installations

This three-pole overcurrent circuit breaker of the BKJ63Nd series, with a rated current of 20A and characteristic D, is a key element ensuring safety in every electrical installation. Designed to protect against overloads and short circuits, it performs well in both domestic and industrial applications. Characteristic D means a delayed response to short-term current surges, which is particularly important when protecting circuits with devices with high inrush current, such as motors or transformers.

Construction and application

The BKJ63Nd circuit breaker is designed for mounting on a 35mm DIN rail. Its compact dimensions (17.8mm wide per pole) allow for efficient use of space in the distribution board. Thanks to the possibility of connecting wires using both lugs and screws, the installation is flexible and adapted to different needs. This circuit breaker is used in circuits with a rated voltage of 415V AC (240V AC for the 1P+N version), offering effective protection against the effects of failures. Compliance with IEC 60898-1 and IEC 60947-2 standards guarantees its reliability and safety of use.

Key features and benefits

• High breaking capacity: 6kA at 240/415V AC provides effective disconnection of the circuit in the event of a short circuit, minimizing the risk of damage and fire.
• Characteristic D: Ideal for protecting circuits with devices with high inrush current – allows for temporary overloads without unnecessary tripping.
• Universal wire connection: The possibility of using lugs or screws provides flexibility during installation and adaptation to different types of wires (up to 25mm²).
• Durable construction: The circuit breaker is designed for long-term operation, offering 10,000 electrical cycles and 20,000 mechanical cycles.
• Compliance with standards: Meeting the requirements of IEC 60898-1 and IEC 60947-2 standards confirms the high quality and safety of the product.
• Compact dimensions: Allow mounting in tight spaces without compromising functionality.
• Wide operating temperature range: From -5°C to +40°C allows the circuit breaker to be used in various environmental conditions.