Overcurrent circuit breaker, 6kA BKJ63Nd series 4P 16A characteristic D BKJ63Nd 4P D16 BKJ63ND 4P D16

Overcurrent circuit breakers BKJ63Nd – reliable installation protection

The BKJ63Nd overcurrent circuit breaker is a protective element for electrical installations against the effects of overloads and short circuits. The BKJ63Nd 4P 16A model with D characteristic provides effective protection in demanding applications where high inrush currents occur, e.g., when switching on motors or transformers. It is a four-pole circuit breaker, which means it protects all phase and neutral conductors.

Characteristics and application

BKJ63Nd circuit breakers are characterized by high reliability and long mechanical (20,000 cycles) and electrical (10,000 cycles) life. They are designed for mounting on a 35mm DIN rail, which facilitates their installation and replacement. The D characteristic ensures delayed tripping in the event of short-term overloads, which minimizes the risk of unnecessary circuit tripping. This is particularly important for devices generating high starting currents.

• Wide voltage range: Circuit breakers adapted to work in installations with voltages of 240/415 VAC (1P), 240 VAC (1P+N) and 415 VAC (2-4P).
• High short-circuit breaking capacity: Short-circuit breaking capacity at 6kA guarantees safe disconnection of the circuit in the event of a short circuit.
• Mounting: Easy mounting on a standard 35mm DIN rail.
• Application: Ideal for protecting circuits powering devices with high power consumption, such as motors, pumps, electric heaters or transformers.
• Terminal: Available in versions with screw and lug terminals, providing flexibility in connecting cables of various cross-sections (up to 25mm²).

Construction and standards

BKJ63Nd circuit breakers have been designed and manufactured in accordance with IEC 60898-1 and IEC 60947-2 standards, which confirms their safety and compliance with applicable regulations. The housing made of high-quality materials provides resistance to mechanical damage and external factors. The ambient operating temperature is from -5°C to +40°C. The circuit breaker has a protection degree of IP20, which means protection against touching with a finger and against the ingress of solid objects larger than 12.5 mm.