2CDS272334R0317 ABB ST202M-K3 Miniature Circuit Breaker 15kA 2P K 3A UL 1077

Why Choose the ABB ST202M-K3 Miniature Circuit Breaker?

The ABB ST202M-K3 is a robust two-pole miniature circuit breaker (MCB) designed to provide supplementary overcurrent and short-circuit protection in industrial automation, machinery and control systems. As part of the ABB System pro M compact ST200M series, it combines a K tripping characteristic with a 3 A rated current for dependable protection of circuits supplying inductive equipment and loads with elevated starting currents.

Designed for applications requiring UL 1077 supplementary protection, the ST202M-K3 provides two-pole protection in a compact DIN rail format. Its K tripping characteristic is particularly suited to industrial circuits where higher transient currents can occur during equipment start-up, helping reduce unwanted tripping while maintaining effective overload and short-circuit protection.

With a rated current of 3 A, a two-pole configuration and a 15 kA short-circuit breaking capacity, the ST202M-K3 provides reliable supplementary protection for demanding electrical applications. Its combination of compact construction, resettable operation and K characteristic makes it well suited to industrial control panels, machinery and OEM electrical equipment.

Key Advantages

• Compact two-pole miniature circuit breaker for supplementary circuit protection.
• 3 A rated current suitable for industrial control, auxiliary and equipment circuits.
• K tripping characteristic suited to inductive loads and circuits with elevated starting currents.
• 15 kA short-circuit breaking capacity for robust fault protection.
• Designed for UL 1077 supplementary protection applications.
• DIN rail mounting enables straightforward integration into industrial electrical panels and OEM machinery.

Key Features

• ABB System pro M compact ST200M series.
• 3 A rated current.
• 2-pole configuration.
• K tripping characteristic.
• 15 kA short-circuit breaking capacity.
• Designed for UL 1077 supplementary circuit protection.
• Thermal-magnetic overload and short-circuit protection.
• K characteristic provides increased tolerance of transient starting currents.
• Resettable operation for convenient restoration following fault clearance.
• Compact modular construction for efficient use of control-panel space.
• DIN rail mounting for straightforward installation.

Reliable Supplementary Protection for Inductive Loads

Miniature circuit breakers such as the ABB ST202M-K3 automatically interrupt a circuit when excessive current caused by an overload or short circuit is detected. This helps protect conductors and connected electrical equipment while providing convenient resettable protection for industrial control, auxiliary and machine-building circuits.

The K characteristic is well suited to circuits supplying inductive equipment and other loads that can generate elevated transient currents during start-up. Combined with its 3 A rating, two-pole configuration and high short-circuit breaking capacity, the ST202M-K3 provides a compact supplementary protection solution for industrial automation, control panels and OEM machinery.

Typical Applications

• Industrial machinery and electrical control panels.
• Automation and process-control equipment.
• Inductive electrical loads and equipment.
• Control and auxiliary circuits with elevated start-up currents.
• Commercial and industrial electrical equipment.
• OEM machinery requiring UL 1077 supplementary protection.