2CCS861002R1487 ABB S801S-UCK20-R High Performance MCB 50kA 1P Type K 20A

Why Choose the ABB S801S-UCK20-R High Performance MCB?

The ABB S801S-UCK20-R is a high-performance single-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding electrical installations. Part of the ABB S800S high-performance circuit breaker range, this current-limiting device combines a 20 A rated current, UC-K / Type K tripping characteristic and high 50 kA short-circuit breaking capability.

The S801S-UCK20-R uses thermal and electromagnetic tripping mechanisms to protect circuits against sustained overloads and short-circuit faults. Its Type K characteristic is particularly suited to circuits with elevated starting or inrush currents, helping accommodate normal equipment start-up while maintaining effective protection against genuine overcurrent conditions.

With a rated current of 20 A and a short-circuit breaking capability of 50 kA, the S801S-UCK20-R is engineered for installations requiring dependable protection against high prospective fault currents. Its single-pole configuration and compact modular construction make it suitable for professional distribution, machinery and industrial control applications.

Key Advantages

• High-performance single-pole miniature circuit breaker for overload and short-circuit protection.
• 20 A rated current for electrical distribution and equipment circuits.
• UC-K / Type K tripping characteristic suited to loads with elevated starting currents.
• 50 kA short-circuit breaking capability for demanding electrical installations.
• Thermal and electromagnetic mechanisms provide effective overcurrent protection.
• Current-limiting construction helps reduce fault energy and electrical stresses on the installation.

Key Features

• ABB S800S high-performance MCB series.
• 1-pole configuration.
• 20 A rated current.
• UC-K / Type K tripping characteristic.
• 50 kA short-circuit breaking capability.
• Thermal overload and electromagnetic short-circuit tripping mechanisms.
• Suitable for circuits with elevated normal starting or inrush currents.
• Current-limiting operation for enhanced protection during fault conditions.
• Rapid interruption of short-circuit currents.
• DIN rail mounted modular construction for professional electrical installations.

High-Performance Protection for Higher-Inrush Circuits

Miniature circuit breakers such as the ABB S801S-UCK20-R automatically disconnect a circuit when excessive current occurs. The thermal tripping mechanism responds to sustained overload conditions, while the electromagnetic mechanism provides rapid operation during short circuits, helping protect conductors, connected equipment and electrical installations against damaging fault currents.

The Type K characteristic is particularly useful where connected equipment can produce elevated but normal starting currents. Combined with the high breaking capability and current-limiting performance of the ABB S800S range, the S801S-UCK20-R provides robust protection for demanding circuits supplying motors, transformers and other inductive equipment.

Typical Applications

• Industrial machinery and equipment circuits.
• Motor circuits with elevated starting currents.
• Transformer and inductive load circuits.
• Industrial control panels and automation systems.
• Commercial and industrial electrical distribution systems.
• Installations with high prospective fault currents.