SZ203-B20 overcurrent circuit breaker, 3P, B characteristic, 20A, 6kA, AC 2CDS253025R0205

Reliable protection of electrical installations with ABB SZ203-B20 circuit breaker

This three-pole ABB S203 series circuit breaker is a key element of every safe and reliable electrical installation. Designed to protect against overloads and short circuits, it provides peace of mind for both installers and end users. It is characterized by a high short-circuit breaking capacity of 6kA at 400V, which guarantees effective disconnection of the circuit in the event of a failure. Made of high-quality materials, it is durable and resistant to environmental conditions.

Functionality and application

The SZ203-B20 circuit breaker with B characteristic is ideal for protecting circuits with high starting currents, such as those occurring when starting motors or devices with heating elements. The B characteristic means that the circuit breaker reacts faster to overloads than to short-term current surges, minimizing the risk of unnecessary tripping during normal device operation. Mounting is done on a standard DIN TH35 rail, which facilitates and speeds up installation. Designed to operate at temperatures from -25°C to +55°C, it will perform well in various conditions.

Key features and benefits

• High short-circuit breaking capacity: 6kA at 400V AC provides effective protection against serious damage to the installation.
• B characteristic: Optimal for circuits with devices with high starting currents – minimizes the risk of false tripping.
• DIN rail mounting: Quick and easy mounting in standard electrical panels.
• Width of 3 modules: Compact dimensions allow for efficient use of space in the switchboard.
• Wide range of wire cross-sections: Possibility of connecting wires with a cross-section from 0.75 mm² to 35 mm², which provides flexibility when selecting supply wires.
• Protection class IP20: Protection against touching with a finger and against the ingress of solid objects larger than 12.5 mm – basic protection inside the switchboard.
• Compliance with standards: Ensures safety and compliance with applicable regulations (energy limitation class 3, overvoltage category 3).
• Mechanical and electrical durability: The circuit breaker is designed for multiple uses – withstands 20,000 mechanical and electrical cycles.