Why Choose the ABB S203MC32-1 Miniature Circuit Breaker?
The ABB S203MC32-1, also identified as S203M-C32, is a high-performance three-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the established ABB System pro M compact S200M series, it provides dependable circuit protection for commercial, industrial and residential electrical installations.
The circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromechanical tripping mechanism for rapid short-circuit interruption. Its C-curve tripping characteristic is suitable for circuits with moderate inrush currents, including lighting systems, HVAC equipment, control panels, small motors and general power distribution.
With a rated current of 32 A, a three-pole configuration and a rated short-circuit capacity of 10 kA at 230/400 V AC, the S203MC32-1 provides robust protection for three-phase electrical circuits. Its compact three-module design enables straightforward installation on a standard 35 mm DIN rail inside distribution boards, switchboards and industrial control panels.
Key Advantages
- Dependable overload and short-circuit protection for three-phase circuits.
- 32 A rated current suitable for commercial and industrial electrical loads.
- C-curve tripping characteristic for equipment with moderate starting currents.
- 10 kA rated short-circuit breaking capacity at 230/400 V AC.
- Current-limiting operation helps minimise fault energy and equipment damage.
- Compact DIN rail design simplifies installation and panel integration.
Key Features
- ABB System pro M compact S200M series.
- Three-pole miniature circuit breaker.
- 32 A rated current.
- C tripping characteristic.
- 10 kA rated short-circuit capacity (Icn).
- 15 kA ultimate short-circuit breaking capacity (Icu) at 400 V AC.
- Thermal overload and electromechanical short-circuit protection.
- Red ON and green OFF contact-position indication.
- Failsafe bidirectional cylinder-lift screw terminals.
- Standard 35 mm DIN rail mounting.
Reliable Protection for Three-Phase Electrical Systems
The ABB S203MC32-1 automatically disconnects an electrical circuit when an overload or short circuit occurs, helping protect cables, connected equipment and the wider installation. Its thermal mechanism responds to sustained excess current, while the electromechanical mechanism provides rapid interruption during severe fault conditions.
The C-curve characteristic permits moderate temporary current surges without unnecessary tripping. This makes the S203MC32-1 suitable for general power distribution, lighting systems, HVAC equipment, control circuits and machinery where predictable starting currents are present.
Typical Applications
- Three-phase commercial distribution circuits.
- Industrial control panels and switchboards.
- Lighting and general power systems.
- HVAC, pumps and ventilation equipment.
- Small motors and machinery circuits.
- OEM automation and manufacturing equipment.
