Why Choose the ABB S203MC20-1 Miniature Circuit Breaker?
The ABB S203MC20-1, also identified as S203M-C20, is a premium three-pole miniature circuit breaker (MCB) designed to protect electrical installations against overloads and short circuits. As part of the trusted ABB System pro M compact S200M series, it delivers dependable protection for residential, commercial and industrial electrical systems.
The circuit breaker incorporates both a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for rapid short-circuit interruption. Its C-curve tripping characteristic makes it ideal for general-purpose distribution circuits, lighting installations, HVAC equipment, control panels and small motors with moderate inrush currents.
With a rated current of 20 A, a three-pole configuration and a rated short-circuit capacity of 10 kA at 230/400 V AC, the S203MC20-1 provides reliable protection for three-phase electrical circuits. Its compact DIN rail mounted design enables straightforward installation inside distribution boards, switchboards and industrial control panels.
Key Advantages
- Reliable overload and short-circuit protection for three-phase circuits.
- 20 A rated current for commercial and industrial applications.
- C-curve tripping characteristic for circuits with moderate inrush currents.
- 10 kA short-circuit breaking capacity.
- Current-limiting design helps reduce fault energy.
- Compact DIN rail mounting simplifies installation and maintenance.
Key Features
- ABB System pro M compact S200M series.
- Three-pole miniature circuit breaker.
- 20 A rated current.
- C tripping characteristic.
- 10 kA rated short-circuit capacity (Icn).
- Thermal overload and magnetic short-circuit protection.
- Current-limiting construction.
- Bottom-mounted auxiliary contact compatibility.
- Red ON and green OFF contact position indication.
- 35 mm DIN rail mounting.
Reliable Circuit Protection for Commercial and Industrial Installations
The ABB S203MC20-1 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect wiring, equipment and personnel. Its current-limiting design reduces fault energy, improving safety and helping minimise damage to connected electrical equipment.
Its C-curve tripping characteristic is well suited to electrical distribution systems supplying lighting circuits, HVAC equipment, control panels, socket outlets and machinery with moderate transient starting currents.
Typical Applications
- Commercial electrical distribution boards.
- Industrial switchboards and control panels.
- Building services installations.
- Lighting and general power circuits.
- HVAC equipment.
- OEM machinery and automation systems.
