Overcurrent circuit breaker, 3P, D characteristic, 20A, 10kA, AC | S203M-D20 2CDS273001R0201

Three-pole overcurrent circuit breaker – reliable installation protection

This three-pole overcurrent circuit breaker from ABB's Standard series, with D characteristic and a rated current of 20A, is a key element ensuring safety in every electrical installation. The rated short-circuit breaking capacity of 10kA (AC) guarantees effective protection against the effects of overloads and short circuits. The device is designed to work with a voltage of 400V and a frequency of 50-60Hz.

Functionality and application

The circuit breaker with D characteristic is characterized by a delayed response time, making it an ideal solution for protecting circuits with receivers with high inrush current, such as motors, transformers or heating devices. This minimizes the risk of unnecessary tripping of the installation when starting these devices. Application in industry, commercial and residential construction provides comprehensive protection against damage caused by overloads or short circuits. A wide range of wire cross-sections (0.75 - 35 mm² for solid and 0.75 - 25 mm² for stranded) allows for flexible adaptation to different types of installations.

Characteristics and operating parameters

The circuit breaker is designed to operate in harsh environmental conditions, with an ambient temperature range of -25°C to +55°C. The degree of protection IP20 provides basic protection against accidental contact. Energy limitation class 3 and surge category III confirm high resistance to interference and ensure stable operation in demanding conditions. The rated impulse withstand voltage of 4kV further increases safety. The width of the device, 3 modules, allows for easy mounting in standard electrical panels. Power losses of 6.9W minimize the impact on the energy efficiency of the installation.