Overcurrent circuit breaker, 3P, B characteristic, 6A, 10kA, AC | S203M-B6 2CDS273001R0065

Reliable protection of electrical installations with ABB S203M-B6 circuit breaker

This three-pole circuit breaker with B characteristic is a key element of every safe and reliable electrical installation. It provides effective protection against overloads and short circuits, minimizing the risk of damage and fire. It is an ideal solution for both installers and end-users who value safety and long-term system operation.

The S203M-B6 circuit breaker is designed to operate in AC networks with a voltage of 400V, and its rated current is 6A. The B characteristic means that the circuit breaker reacts quickly to short circuits, but is more tolerant to short-term current surges during device start-up – which is particularly important when connecting motors or transformers. The rated short-circuit breaking capacity reaches 10kA at 400V and 230V, as well as 15kA (Icu) at 400V and 25kA (Icu) at 230V, which guarantees its effectiveness in the event of a failure.

Construction and mounting

The ABB S203M-B6 circuit breaker occupies 3 modules on a DIN rail, which facilitates its installation in electrical distribution boards. Its installation depth is 69 mm. The solid construction and high degree of protection (IP20) ensure durability and reliability even in harsh working conditions (ambient temperature from -25°C to +55°C). The possibility of using additional equipment allows the circuit breaker to be adapted to specific installation needs. The cross-section of solid conductors can range from 0.75 mm² to 35 mm², and stranded conductors from 0.75 mm² to 25 mm².

Safety and compliance with standards

The circuit breaker meets the requirements of overvoltage category III and pollution degree 3, which confirms its high resistance to interference and environmental conditions. It has energy limitation class 3 and rated insulation voltage Ui of 440 V. The rated impulse withstand voltage Uimp is as high as 4 kV. Power losses are only 6W, which translates to efficient energy use. The device does not have a removable N pole and is not explosion-proof.