Overcurrent circuit breaker, 3P+N, B characteristic, 20A, 6kA, AC | S203-B20NA 2CDS253103R0205

Reliable protection of electrical installations with ABB S203-B20NA circuit breaker

This three-pole circuit breaker with a connected neutral pole (3P+N) is a key element of every safe electrical installation. Designed by the renowned company ABB, it provides effective protection against overloads and short circuits, minimizing the risk of damage and fires. Characteristic B makes it ideal for circuits with devices with moderate inrush current, such as lighting or sockets. The rated current of 20A and the short-circuit breaking capacity of 6kA guarantee reliable operation in typical household and commercial applications.

The S203-B20NA circuit breaker is distinguished by its compact design – it takes up only 4 modules on a DIN rail, which makes installation easier even in limited spaces. Solid construction and high-quality materials ensure long-lasting and trouble-free operation. Thanks to a wide range of permissible conductor cross-sections (0.75 mm² to 35 mm² for solid and 0.75 mm² to 25 mm² for stranded), it is compatible with various types of wiring.

Versatile application and compliance with standards

This circuit breaker is used to protect lighting circuits, socket outlets and other electrical devices with moderate power consumption. It meets the requirements of overvoltage category III and pollution degree 3, making it suitable for operation in harsh environmental conditions. The rated insulation voltage Ui is 440V, and the rated impulse withstand voltage Uimp is 4kV, which further confirms its high reliability. Compliance with EN 60898 and IEC 60947-2 standards ensures operational safety and security. Additionally, the possibility of expansion with accessories allows the circuit breaker to be adapted to specific installation needs.