Overview
The ABB S281UC-Z0.5A is a single-pole miniature circuit breaker (MCB) engineered for precise overcurrent protection in low-voltage AC applications. Part of ABB’s System pro M line, this breaker combines compact DIN rail mounting with exceptional reliability for industrial control systems, switchboards, and panel protection.
Key Features
- 1-pole configuration for single-phase circuit protection
- 0.5A rated current with Z-curve trip characteristic
- Compact DIN rail-mounted design for space-efficient panel integration
- UL 1077 certification for North American compliance
- Manual reset operation with clear ON/OFF indication
- Suitable for AC applications in control panels and distribution systems
Technical Specifications
The S281UC-Z0.5A operates across industrial voltage standards and provides dependable isolation. The Z-curve characteristic provides rapid response to short circuits while minimizing nuisance trips from inrush currents common in motor and transformer circuits. This breaker is ideal for protecting sensitive control circuits and low-amperage loads.
Typical Applications
- Control circuit protection in industrial machinery
- PLC and HMI power supply protection
- Motor starter auxiliary circuit protection
- Instrumentation and sensor circuit isolation
- Low-current branch circuit protection in automation panels
- System pro M switchgear integration
Compatibility & Replacements
The S281UC-Z0.5A integrates directly into System pro M modular switchgear systems and standard DIN rail enclosures. As an ABB original component, it maintains full compatibility with ABB control panel designs. For higher current requirements, ABB offers S281UC models from 1A to 63A in the same product family. Ensure proper voltage and curve rating when cross-referencing with other manufacturers’ breakers.
