Overcurrent circuit breaker, 3P, Z characteristic, 4A, 10kA, AC | S203M-Z4 2CDS273001R0338

Protection of installations and devices – reliable ABB circuit breaker

This three-pole circuit breaker from ABB with Z characteristic is a key element in protecting the electrical installation. Designed to protect against the effects of overloads and short circuits, it ensures safety in both domestic and industrial installations. The Z characteristic means that the circuit breaker reacts very quickly to an increase in current, which is particularly important in circuits with devices with high power consumption or sensitive electronics. The rated current of 4A makes it ideal for protecting circuits with lower loads.

Parameters and application

The S203M-Z4 circuit breaker is designed to operate in networks with a voltage of 400V, and its rated short-circuit breaking capacity (Icn) is 10kA at 230V and 15kA at 400V. This capacity guarantees effective disconnection of the circuit in the event of a failure, minimizing the risk of damage to equipment and fire. The width of 3 modules makes it easy to install in electrical distribution boards. The cross-section of the connectable multi-wire cable is 0.75 mm² to 25 mm², and the single-wire cable from 0.75 mm² to 35 mm², which provides flexibility in cable selection. The ambient temperature in operating conditions is from -25°C to +55°C, which allows it to be used in various environmental conditions. The degree of protection IP20 provides protection against accidental contact.

Construction and benefits for the installer and user

The ABB Standard series circuit breaker is characterized by a solid construction and high quality workmanship, which translates into a long service life and reliable operation. The possibility of additional equipment allows you to adapt the circuit breaker to the specific needs of the installation – it can be equipped with, for example, status indicators or mechanical locks. The energy limitation class is 3, which means high efficiency in limiting short-circuit energy. Power losses are 7.2W – a value important in the design of energy-efficient electrical installations. Installation is simple and intuitive thanks to standard dimensions and a mounting system on a TH35 rail. Explosion-proof design is not required, which simplifies its use in typical electrical installations.