2CDS271334R0157 ABB ST201M-K0.5 0.5A 1P K Curve 15kA Miniature Circuit Breaker

Why Choose the ABB ST201M-K0.5 Miniature Circuit Breaker?

The ABB ST201M-K0.5 is a high-performance single-pole miniature circuit breaker (MCB) / supplementary protector designed to provide reliable overload and short-circuit protection in industrial control, automation and equipment circuits. With ABB order code 2CDS271334R0157, it forms part of the ABB ST 200 M series of modular circuit protection devices.

Designed for demanding applications requiring dependable circuit protection in a compact DIN-rail format, the ST201M-K0.5 combines thermal and magnetic tripping to protect electrical equipment and conductors against overcurrent conditions. Its K tripping characteristic is particularly suited to inductive loads and circuits where higher starting currents must be tolerated without unnecessary tripping.

The ST201M-K0.5 has a rated current of 0.5 A, a single-pole configuration and a 15 kA short-circuit breaking capacity. Its UL 1077 classification supports use as a supplementary protector within electrical equipment, making it well suited to low-current industrial control and automation applications.

Key Advantages

• Compact single-pole miniature circuit breaker for supplementary circuit protection.
• 0.5 A rated current suitable for sensitive low-current control and equipment circuits.
• K tripping characteristic suited to inductive loads and circuits with higher starting currents.
• 15 kA short-circuit breaking capacity for demanding protection applications.
• UL 1077 supplementary protector classification.
• DIN-rail modular construction simplifies integration into industrial control and automation panels.

Key Features

• ABB ST 200 M series miniature circuit breaker.
• 0.5 A rated current.
• Single-pole (1P) configuration.
• K-curve tripping characteristic.
• 15 kA short-circuit breaking capacity.
• UL 1077 supplementary protector.
• Thermal-magnetic protection against overload and short-circuit conditions.
• Compact modular design for DIN-rail installation.

Reliable Circuit Protection for Industrial Systems

Miniature circuit breakers such as the ABB ST201M-K0.5 provide automatic protection against overload and short-circuit conditions. When current exceeds the permitted operating range, the thermal-magnetic tripping mechanism disconnects the protected circuit, helping protect connected wiring and electrical equipment from damaging overcurrent conditions.

The ST 200 M series is designed for industrial applications where compact modular protection and dependable switching performance are required. The ST201M-K0.5's 0.5 A rating and K tripping characteristic make it particularly useful for low-current circuits with inductive loads or elevated starting currents, while its UL 1077 classification supports supplementary protection within electrical equipment.

Typical Applications

• Industrial control panels and automation systems.
• Low-current machine control and auxiliary circuits.
• Inductive control loads with elevated starting currents.
• Control, signalling and instrumentation equipment.
• Supplementary protection within electrical equipment.
• Industrial machinery and DIN-rail control assemblies.