2CCF019953R0001 ABB S803S-K0.5 High Performance MCB 50 kA 3P Type K 0.5 A

Why Choose the ABB S803S-K0.5 High Performance MCB?

The ABB S803S-K0.5 is a high-performance 3-pole miniature circuit breaker (MCB) designed to protect industrial electrical circuits against overloads and short circuits where a high breaking capacity is required. As part of the advanced ABB S800S high-performance MCB series, it combines a K tripping characteristic with robust circuit protection for demanding industrial power distribution and equipment applications.

The S803S-K0.5 uses a thermal release for overload protection together with an electromechanical release for short-circuit protection. Its Type K characteristic makes it particularly suitable for circuits with functional peak currents, including control equipment, transformers and other industrial loads, while helping to minimise unwanted tripping during normal operation.

With a rated current of 0.5 A, three protected poles and a rated ultimate short-circuit breaking capacity of 50 kA at 240/415 V AC, the S803S-K0.5 provides dependable protection for demanding three-phase circuits. The breaker supports operating voltages up to 690 V AC under IEC 60947-2, making it suitable for a wide range of industrial electrical systems.

Key Advantages

• High-performance 3-pole miniature circuit breaker for demanding industrial applications.
• 0.5 A rated current with K tripping characteristic.
• Rated ultimate short-circuit breaking capacity of 50 kA at 240/415 V AC.
• Designed to protect circuits against both overload and short-circuit conditions.
• Type K characteristic is suitable for circuits subject to functional peak or starting currents.
• Supports operating voltages up to 690 V AC under IEC 60947-2.
• Thermal and electromechanical release mechanisms provide reliable circuit protection.
• Suitable for integration with ABB S800 series accessories and auxiliary devices.

Key Features

• ABB S800S high-performance MCB series.
• 3-pole configuration.
• 0.5 A rated current.
• Type K tripping characteristic.
• 50 kA rated ultimate short-circuit breaking capacity at 240/415 V AC.
• 690 V AC rated operational voltage according to IEC 60947-2.
• 375 V DC rated operational voltage according to IEC 60947-2.
• 8 kV rated impulse withstand voltage.
• AC/DC input voltage capability.
• Thermal overload and electromechanical short-circuit protection.
• Designed for industrial circuit protection applications.
• Compliant with IEC/EN 60947-2 and IEC/EN 60898-1.

High-Performance Circuit Protection for Industrial Systems

The ABB S800S range is engineered for circuits where high short-circuit breaking capacity and dependable overload protection are essential. The S803S-K0.5 combines thermal overload protection with rapid electromechanical short-circuit protection, helping safeguard cables, equipment and electrical distribution systems under demanding fault conditions.

Its K characteristic makes the breaker particularly useful for industrial circuits where temporary functional peak currents can occur during normal operation. Combined with its three-pole construction and high breaking capacity, the S803S-K0.5 provides effective protection for three-phase industrial systems, control equipment and other demanding electrical applications.

Typical Applications

• Industrial three-phase electrical circuits.
• Control and auxiliary circuits.
• Transformer protection applications.
• Industrial machinery and automation equipment.
• Electrical distribution and control panels.
• Manufacturing and process equipment.
• Commercial and industrial installations requiring high short-circuit breaking capacity.