2CDS273334R0351 ABB ST203M-D35 Miniature Circuit Breaker 15 kA 3P D 35 A UL1077

Why Choose the ABB ST203M-D35 Miniature Circuit Breaker?

The ABB ST203M-D35 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable supplementary overload and short-circuit protection for electrical circuits and equipment. As part of the robust ABB ST200M series, it combines a D tripping characteristic, 35 A rated current and three poles in a compact modular format.

Designed for supplementary protection applications in accordance with UL 1077, the ST203M-D35 is well suited to industrial control panels, machinery and automation equipment. Its D characteristic accommodates loads with comparatively high starting and inrush currents, making it particularly useful for inductive equipment and circuits where substantial short-duration current peaks can occur during normal start-up.

With a rated current of 35 A, a 15 kA short-circuit breaking capacity and three-pole configuration, the ST203M-D35 provides dependable protection for demanding multi-pole circuits. Its compact modular construction supports straightforward DIN-rail installation inside electrical control panels, machinery cabinets and industrial automation systems.

Key Advantages

• Reliable three-pole miniature circuit breaker for supplementary circuit protection.
• 35 A rated current for industrial and control circuits.
• D tripping characteristic suitable for loads with comparatively high starting or inrush currents.
• 15 kA short-circuit breaking capacity for robust fault protection.
• Designed for supplementary protection in accordance with UL 1077.
• Compact modular construction for straightforward DIN-rail installation.

Key Features

• ABB ST200M miniature circuit breaker series.
• 35 A rated current.
• Three-pole configuration.
• D tripping characteristic.
• 15 kA breaking capacity.
• Thermal-magnetic overload and short-circuit protection.
• Resettable circuit protection for convenient restoration after fault clearance.
• Compact DIN-rail mounting design for industrial electrical panels.

Reliable Circuit Protection for Industrial Equipment

Miniature circuit breakers such as the ABB ST203M-D35 automatically disconnect a circuit when excessive current occurs due to an overload or short circuit. Thermal and magnetic tripping mechanisms provide protection against sustained overloads and high fault currents, helping safeguard wiring, control equipment and connected loads.

The D tripping characteristic is designed for applications where normal equipment start-up can produce comparatively high current peaks. This makes the ST203M-D35 particularly suitable for industrial machinery and inductive loads where additional tolerance of short-duration starting currents helps minimise unwanted tripping.

Typical Applications

• Industrial machinery and automation control panels.
• Three-phase control and auxiliary circuits.
• Equipment with comparatively high starting or inrush currents.
• Electrical distribution and control cabinets.
• OEM machinery and production equipment.
• Supplementary overcurrent protection applications requiring UL 1077 compliance.