2CDS271334R0407 ABB ST201M-K8 Miniature Circuit Breaker 15kA 1P K 8A UL1077

Why Choose the ABB ST201M-K8 Miniature Circuit Breaker?

The ABB ST201M-K8 is a compact and reliable single-pole miniature circuit breaker (MCB) designed to provide supplementary overcurrent and short-circuit protection for industrial control equipment, machinery and electrical systems. As part of the ABB ST200M series, it combines thermal-magnetic protection with a K tripping characteristic and compliance with UL 1077 requirements.

Rated at 8 A, the ST201M-K8 uses a K tripping characteristic, making it particularly suitable for circuits supplying inductive loads where short-duration starting currents must be tolerated while maintaining dependable fault protection. Its modular construction supports straightforward integration into industrial control panels and machine electrical assemblies.

The ST201M-K8 is a 1-pole device with ABB order code 2CDS271334R0407. With a 15 kA short-circuit breaking capacity and UL 1077 classification, it provides robust supplementary protection for demanding industrial control and equipment circuits.

Key Advantages

• Compact single-pole miniature circuit breaker for supplementary circuit protection.
• 8 A rated current for industrial control and equipment circuits.
• K tripping characteristic well suited to inductive loads and circuits with starting currents.
• 15 kA short-circuit breaking capacity for robust fault protection.
• Designed as a UL 1077 supplementary protector.
• Modular DIN-rail format simplifies installation in electrical control panels.

Key Features

• ABB ST200M series miniature circuit breaker.
• 1-pole configuration.
• 8 A rated current.
• K-characteristic thermal-magnetic tripping.
• 15 kA short-circuit breaking capacity.
• Designed for UL 1077 supplementary protection.
• Resettable circuit protection without replacement fuses.
• Compact DIN-rail mounting for industrial control assemblies.

Reliable Protection for Industrial Control Circuits

Miniature circuit breakers such as the ABB ST201M-K8 automatically interrupt current when overload or short-circuit conditions exceed the permitted operating range. Thermal-magnetic operation combines time-dependent overload protection with rapid magnetic response to short-circuit faults, helping protect conductors and connected electrical equipment.

The K tripping characteristic is particularly useful for inductive loads that can produce elevated starting currents during normal operation. This makes the ST201M-K8 suitable for industrial machinery, motor-related control circuits, transformers, solenoids and other equipment where reliable protection must be combined with tolerance of normal inrush current.

Typical Applications

• Industrial machinery and automation control panels.
• Motor-related control and auxiliary circuits.
• Transformers, solenoids and other inductive loads.
• Supplementary protection of electrical equipment.
• Manufacturing and production machinery.
• OEM electrical and machine control assemblies.