Overcurrent circuit breaker, 3P, D characteristic, 25A, 10kA, AC | S203M-D25 2CDS273001R0251

Three-pole overcurrent circuit breaker – reliable installation protection

This three-pole overcurrent circuit breaker from ABB's S203M series, with D characteristic and a rated current of 25A, is a key element ensuring safety in every electrical installation. The ability to switch off short circuits at a level of 10kA (AC) guarantees effective protection against the effects of overloads and short circuits, minimizing the risk of damage to equipment and fires. The D characteristic makes this circuit breaker particularly recommended for protecting circuits with receivers with high starting currents, such as motors or transformers.

Construction and practical application

This circuit breaker, mounted on a TH35 rail, occupies 3 modules in width. Its solid construction and high quality of workmanship translate into a long service life and reliable operation. It is designed to protect circuits with a rated voltage of 400V and a frequency of 50-60Hz. The rated short-circuit breaking capacity (Icn) is 10kA at 400V and 230V, and the Icu value according to IEC 60947-2 is 15kA (400V) and 25kA (230V), respectively. This makes the circuit breaker meet the requirements for both domestic and industrial installations.

Key features and benefits for professionals and users

• D characteristic: Ideal for protecting circuits with motors, transformers and other receivers generating high starting currents – ensures stable operation without unnecessary tripping.
• High short-circuit breaking capacity (10kA): Guarantees effective disconnection of the circuit in the event of a short circuit, protecting equipment and installation from damage.
• Three-pole design: Provides comprehensive protection for three-phase electrical circuits.
• Mounting on TH35 rail: Enables quick and easy mounting in a distribution board.
• Width of 3 modules: Compact dimensions allow for efficient use of space in the distribution board.
• Wire cross-sections: Accepts solid wires with a cross-section of 0.75-35mm² and stranded wires 0.75-25mm², giving flexibility in wire selection.
• Operating temperature: Withstands ambient temperatures from -25°C to +55°C, allowing it to be used in various environmental conditions.
• Compliance with standards: Meets the requirements of EN 60898 and IEC 60947-2 standards, confirming its safety and reliability.
• Energy limitation class: Class 3 provides adequate protection against the effects of electric arc during short-circuit switching.
• Rated insulation voltage Ui: 440 V ensures safe operation in various electrical installations.

This circuit breaker is a solid solution for both installers looking for a reliable component for building safe electrical installations, and for end users who value the safety of their home or company.