Overcurrent circuit breaker, 3P, B characteristic, 4A, 6kA, AC | S203-B4 2CDS253001R0045

Overcurrent circuit breaker – reliable protection for electrical installations

This three-pole circuit breaker from ABB's Standard series is a key element of every safe and efficient electrical installation. Designed to protect circuits against overload and short circuit, it provides reliable operation in homes, apartments and industrial facilities. Characteristic B means that the circuit breaker reacts quickly to current increase, but is also resistant to short-term surges, which is particularly important when connecting devices with electric motors.

Functionality and parameters

This circuit breaker has a rated current of 4A and a short-circuit interrupting capacity of 6kA at 400V, guaranteeing effective protection in typical applications. The rated short-circuit interrupting capacity Icu at 230V is as high as 20kA. Mounting on a TH35 rail allows for easy and quick installation in the switchgear cabinet. A width of 3 modules provides compact dimensions, and the IP20 degree of protection protects against contact and ingress of solid objects.

• Interrupting capacity: 6kA (at 400V), 20kA (at 230V) – a high value ensures safety even in the event of large fault currents.
• Characteristic B: ideal for lighting and socket circuits, as well as for protecting devices with electric motors with low starting current.
• Wire cross-section: possibility to connect wires with a cross-section from 0.75 mm² to 25 mm² (multi-strand) and from 0.75 mm² to 35 mm² (solid) – a wide range makes it easy to adapt to different types of installations.
• Operating temperature: operating temperature range from -25°C to +55°C – enables operation in difficult environmental conditions.
• Overvoltage category: III – provides protection against overvoltages in electrical installations.
• Mounting: on TH35 rail – a standard solution that facilitates installation and device replacement.

Design and application

The circuit breaker is made of high-quality materials, guaranteeing its durability and reliability. The compact design allows for efficient use of space in the switchgear cabinet. It is intended for use in circuits with a rated voltage of 400V and an overvoltage category of III. Compliance with EN 60898 and IEC 60947-2 standards confirms its safety and quality of workmanship. Pollution degree 3 means that the device is adapted to work in environments with a moderate level of pollution.