Overcurrent circuit breaker, 3P, D characteristic, 4A, 6kA, AC | S203-D4 2CDS253001R0041

Installation and device protection with D characteristic

Overcurrent circuit breaker is a key element of every safe electrical installation. Model S203-D4, with a rated current of 4A and a short-circuit breaking capacity of 6kA (AC), provides reliable protection of circuits against overloads and short circuits. The D characteristic makes it particularly useful in applications where high inrush currents occur during the starting of devices, such as motors or transformers. This ensures that the circuit breaker does not trip unnecessarily during short-term current surges, while effectively responding to real threats.

Design and operating parameters

The S203-D4 circuit breaker is designed to operate in a wide range of ambient temperatures, from -25°C to 55°C, making it suitable for use in various environmental conditions. Mounting on a TH35 rail allows for quick and easy installation in a distribution board. The three-pole design provides comprehensive protection for three-phase circuits. A width of 3 modules allows for efficient use of space in the switchgear cabinet. The cross-section of the connected conductor can range from 0.75 mm² to 25 mm² for multi-wire conductors and from 0.75 mm² to 35 mm² for single-wire conductors, providing great flexibility when selecting power cables.

Application and compliance with standards

This circuit breaker meets the requirements of EN 60898 and IEC 60947-2 standards, guaranteeing its safety and reliability. Surge category III and protection degree IP20 provide protection against external interference. The rated insulation voltage Ui is 440V, and the rated operating voltage is 400V. The short-circuit breaking capacity at 6kA at 230V and 10kA at 400V provides effective protection against the effects of short circuits. The possibility of expanding with additional equipment increases the functionality of the circuit breaker and allows it to be adapted to the specific needs of the installation.