SZ203-B40 circuit breaker, 3P, B characteristic, 40A, 6kA, AC 2CDS253025R0405

Reliable protection of electrical installations with ABB S203-B40 circuit breaker

This three-pole circuit breaker from the S200 series is a key element of every safe and reliable electrical installation. Designed by the renowned company ABB, it provides effective protection against overloads and short circuits in AC circuits. It is characterized by a high short-circuit breaking capacity of 6kA, which guarantees safety even in the event of serious disturbances.

The S203-B40 circuit breaker with a rated current of 40A and B characteristic is ideal for both domestic and industrial installations. Its compact dimensions (width 3 modules, depth 69 mm) facilitate mounting on a TH35 DIN rail, and the universal screw terminals allow connection of wires with a cross-section from 0.75 mm² to 35 mm².

Application and functionality

This circuit breaker is widely used in domestic and industrial switchboards and installations where reliable protection of electrical circuits is required. The B characteristic provides a quick response to overloads, but at the same time allows for short-term current surges, e.g. when starting motors or other devices with high power consumption. This minimizes the risk of unnecessary tripping of the circuit.

Construction and distinguishing features

The S203-B40 circuit breaker is made of high-quality materials, which guarantees its durability and reliability. The housing made of RAL 7035 plastic provides resistance to mechanical damage and external factors. In addition, the product meets stringent safety standards (EN 60898-1, IEC 60715, IEC/EN 60664-1) and has an EPD environmental declaration, which confirms its compliance with sustainable development principles. High mechanical and electrical resistance and compatibility with a wide range of ABB accessories make it a versatile solution for professionals and end users. Mounting is possible in any position, which increases flexibility during installation.