Overcurrent circuit breaker, 3P, D characteristic, 63A, 6kA, AC | S203-D63 2CDS253001R0631

Electrical installation protection with ABB S203 series circuit breaker

This three-pole overcurrent circuit breaker from ABB's S203 series provides reliable protection for your electrical installation. Designed to protect against the effects of overloads and short circuits, it ensures safe operation and long-term device performance. Characteristic D makes it particularly recommended for circuits with high starting currents, e.g. powering motors or transformers – it allows it to react more slowly to short current surges, while effectively protecting against overloads. The rated short-circuit breaking capacity of 6kA at 400V guarantees effective disconnection of the circuit in the event of a failure.

### Functionality and application

This circuit breaker is used in both domestic and industrial installations. Thanks to the wide range of permissible conductor cross-sections (0.75 mm² - 35 mm² for solid conductors and 0.75 mm² - 25 mm² for stranded conductors), it is compatible with various types of cabling. Mounting on a TH35 rail (standard width of 3 modules) facilitates installation and integration with an existing switchboard. The rated insulation voltage Ui of 440V and impulse withstand voltage Uimp of 4kV provide high resistance to operating conditions in demanding environments. Energy limitation class 3 and surge category III confirm its effectiveness in protecting against disturbances in the electrical network.

### Key features and benefits

* **Characteristic D:** Ideal for circuits with high starting currents, minimizes the risk of unnecessary tripping of the device during the starting of motors or other high-power consumers.

* **Short-circuit breaking capacity:** 6kA at 400V ensures effective disconnection of the circuit in the event of a short circuit, protecting against damage to the installation and equipment. Additionally, it has a short-circuit breaking capacity Icu of 10kA at 400V and as much as 20kA at 230V – which increases the safety margin.

* **Wide range of conductor cross-sections:** Compatible with various types of cabling, facilitates installation and integration with an existing electrical installation.

* **Mounting on TH35 rail:** Standard mounting facilitates installation and replacement of the circuit breaker in the switchboard.

* **Durable construction:** Made of high-quality materials, ensures long-lasting and reliable operation in various environmental conditions (ambient temperature: -25°C to +55°C).

* **Protection class IP20:** Provides protection against accidental contact and against the ingress of solid objects larger than 12.5 mm – standard protection for devices mounted inside switchboards.

* **Power loss at 14.4W:** Means relatively low energy consumption by the circuit breaker itself during operation, which may be important in larger installations.