ABB S203MC20-1 three-pole miniature circuit breaker with a 20 A rating, C-curve tripping characteristic and 10 kA short-circuit capacity for commercial and industrial electrical protection.
£99.76
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.
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.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-C20 |
| Commercial reference | S203MC20-1 |
| Product ID | 2CDS273001R0204 |
| EAN | 4016779550468 |
| Product type | Miniature circuit breaker |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Rated current | 20 A |
| Tripping characteristic | C curve |
| Rated operational voltage | 400 V AC (IEC/EN 60898-1) |
| Maximum operational voltage | 440 V AC (IEC/EN 60947-2) |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit capacity (Icn) | 10 kA at 230/400 V AC |
| Rated service breaking capacity (Ics) | 7.5 kA |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Protection rating | IP20 |
| Terminal type | Screw terminals |
| Mounting type | 35 mm DIN rail |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077 |
| Dimensions (H × W × D) | approximately 88 × 52.5 × 69 mm |
| Weight | approximately 0.375 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203MC20-1 protects three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial applications.
The miniature circuit breaker has a rated current of 20 A.
A C-curve circuit breaker is designed for circuits with moderate inrush currents, making it suitable for lighting, HVAC equipment, socket circuits and general power distribution.
The circuit breaker has a rated short-circuit capacity of 10 kA at 230/400 V AC.
The S203MC20-1 is designed for installation on a standard 35 mm DIN rail inside electrical distribution boards and industrial control panels.
ABB System pro M compact S200M miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and automation engineers for dependable circuit protection, high breaking capacity and long-term reliability.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...