2CDS273061R0378 ABB S203M-Z6UC 6 A 3-Pole Type Z 10 kA Miniature Circuit Breaker

Why Choose the ABB S203M-Z6UC Miniature Circuit Breaker?

The ABB S203M-Z6UC is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in AC and DC electrical systems. Part of the established ABB System pro M compact® S200 M UC series, this universal-current circuit breaker combines flexible AC/DC operation with a high short-circuit breaking capacity for demanding industrial, control and traction-related applications.

With a rated current of 6 A, a Type Z tripping characteristic and three protected poles, the S203M-Z6UC is particularly suited to circuits containing sensitive equipment where rapid magnetic tripping is required. The Z characteristic provides sensitive overcurrent protection, making this MCB useful for control circuits, electronic equipment and other loads requiring a lower instantaneous trip threshold than conventional B or C characteristic breakers.

The S203M-Z6UC provides a 10 kA short-circuit breaking capacity at 440 V AC and 440 V DC under IEC/EN 60947-2 conditions. Its DIN-rail format and compatibility with ABB System pro M compact® accessories provide a flexible protection solution for industrial distribution boards, control panels, machinery and AC/DC electrical systems.

Key Advantages

• Universal AC/DC miniature circuit breaker for flexible circuit protection.
• 6 A rated current for lower-current industrial and control circuits.
• Three-pole configuration for simultaneous protection of three conductors.
• Type Z tripping characteristic provides sensitive protection for equipment and circuits with low instantaneous trip requirements.
• 10 kA short-circuit breaking capacity at 440 V AC/DC under IEC/EN 60947-2 conditions.
• Suitable for demanding industrial, automation and traction-related electrical systems.
• Compatible with the established ABB System pro M compact® accessory range.

Key Features

• ABB S200 M UC / System pro M compact® series.
• 6 A rated current.
• 3-pole configuration.
• Z-curve tripping characteristic.
• 10 kA breaking capacity at 440 V AC and 440 V DC.
• Designed for AC and DC applications.
• 500 V DC rated voltage under UL 1077.
• Compliance with IEC/EN 60947-2, UL 1077 and CSA 22.2 No. 235.
• Standard modular DIN-rail mounting.
• Compatible with ABB System pro M compact® accessories.

Sensitive AC and DC Circuit Protection

Miniature circuit breakers protect electrical circuits by automatically interrupting current when an overload or short-circuit condition occurs. The ABB S203M-Z6UC combines thermal overload protection with a sensitive Z-characteristic magnetic response, helping protect conductors and connected equipment against damaging overcurrent conditions.

The S200 M UC range is engineered for flexible AC and DC applications and combines high short-circuit breaking performance with broad international approvals. The Z characteristic makes the S203M-Z6UC particularly useful where sensitive equipment requires rapid response to short-circuit or high overcurrent conditions, while its compatibility with System pro M compact® accessories simplifies integration into modular electrical systems.

Typical Applications

• Industrial AC and DC control circuits.
• Electronic and sensitive electrical equipment protection.
• Machinery and automation control panels.
• Industrial electrical distribution systems.
• Power supply and auxiliary circuits.
• Transportation and traction-related electrical systems.
• OEM machinery and automation equipment.