2CDS271334R0487 ABB ST201M-K20 Miniature Circuit Breaker 20 A 1P Type K

Why Choose the ABB ST201M-K20 Miniature Circuit Breaker?

The ABB ST201M-K20 is a compact and reliable single-pole miniature circuit breaker (MCB) designed to provide supplementary overcurrent and short-circuit protection in industrial electrical and control applications. As part of the ABB ST200M miniature circuit breaker series, it combines a 20 A rated current with a K tripping characteristic and UL 1077 supplementary protection capability.

Designed for installation on DIN rail systems, the ST201M-K20 provides dependable circuit protection in a compact modular format. Its thermal-magnetic operating principle protects against sustained overload currents and short-circuit conditions, while the K characteristic is particularly suited to inductive loads and equipment where elevated starting currents can occur during normal operation.

With a rated current of 20 A, K tripping characteristic, 15 kA short-circuit breaking capacity and a single-pole configuration, the ST201M-K20 is suitable for supplementary protection in machinery, control panels, automation equipment and other industrial electrical systems. ABB order code 2CDS271334R0487 identifies this specific ST200M configuration.

Key Advantages

• Compact single-pole miniature circuit breaker for supplementary circuit protection.
• 20 A rated current for industrial and control applications.
• K tripping characteristic suited to inductive loads and circuits with elevated starting currents.
• 15 kA short-circuit breaking capacity for robust fault protection.
• Thermal-magnetic operation provides overload and short-circuit protection.
• UL 1077 supplementary protector design for equipment and control circuits.
• DIN rail mounting enables straightforward integration into electrical panels.

Key Features

• ABB ST200M miniature circuit breaker series.
• 20 A rated current.
• 1-pole configuration.
• Type K tripping characteristic.
• 15 kA short-circuit breaking capacity.
• UL 1077 supplementary protection for electrical equipment and control circuits.
• Thermal-magnetic operating mechanism for overload and short-circuit protection.
• Suitable for inductive loads with elevated starting currents.
• Compact modular construction for DIN rail installations.

Reliable Supplementary Protection for Inductive Loads

Miniature circuit breakers such as the ABB ST201M-K20 automatically interrupt a circuit when excessive current occurs due to an overload or short circuit. This helps protect wiring and electrical equipment while allowing the breaker to be reset after the fault has been identified and corrected.

The K tripping characteristic makes the ST201M-K20 particularly useful for industrial circuits containing inductive equipment that can produce elevated starting currents. Its combination of thermal-magnetic protection, UL 1077 supplementary protection and compact DIN rail construction makes it well suited to machinery and automation control panels.

Typical Applications

• Industrial machinery and equipment control panels.
• Automation and process control systems.
• Motor and inductive load control circuits.
• Transformers, solenoids and auxiliary equipment.
• Industrial power supplies and electrical equipment.
• OEM machinery and electrical cabinet assemblies.