ABB S203C63 3-pole 63 A miniature circuit breaker with C curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£88.71
The ABB S203C63 is a premium 3-pole miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in residential, commercial and industrial electrical installations. As part of the trusted ABB System pro M Compact S200 series, it combines reliable thermal-magnetic protection with current-limiting technology and a compact DIN rail design for modern electrical distribution systems.
Featuring a C curve tripping characteristic, the S203C63 is ideal for circuits with moderate inrush currents, making it suitable for motors, compressors, pumps, HVAC equipment, transformers and general three-phase power distribution. Its thermal overload mechanism and electromagnetic short-circuit protection ensure rapid fault clearance whilst helping to protect cables and connected equipment.
With a rated current of 63 A, a 3-pole configuration and a 6 kA rated short-circuit breaking capacity, the ABB S203C63 is designed for three-phase systems operating at up to 400 V AC. Compatibility with ABB auxiliary accessories and its compact DIN rail format simplify installation and future expansion.
The ABB S203C63 automatically disconnects electrical circuits when overload or short-circuit conditions occur, helping protect wiring, switchgear and connected equipment from electrical damage. Its thermal-magnetic operating mechanism delivers dependable protection whilst reducing downtime and improving installation safety.
Its C curve characteristic makes the breaker particularly suitable for motors, compressors, pumps, HVAC equipment, industrial machinery and commercial distribution systems where moderate temporary starting currents are expected. The current-limiting design helps reduce thermal and mechanical stress during fault conditions.
| HS Code | 85362010 |
|---|---|
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-C63 |
| Product code | 2CDS253001R0634 |
| EAN | 4016779551076 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 63 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Trip characteristic | C Curve |
| Rated operational voltage | 230/400 V AC (440 V AC to IEC/EN 60947-2) |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity (Icn) | 6 kA |
| Ultimate short-circuit breaking capacity (Icu) | 20 kA at 230 V AC; 10 kA at 400/440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Energy limiting class | 3 |
| Protection rating | IP20 |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approximately 88 × 52.5 × 69 mm |
| Weight | approximately 0.375 kg |
The ABB S203C63 protects three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial installations.
A C curve breaker is designed for circuits with moderate inrush currents, making it suitable for motors, compressors, pumps, HVAC systems and other inductive loads.
The ABB S203C63 is a 3-pole miniature circuit breaker for protecting three-phase electrical circuits.
The ABB S203C63 has a 63 amp current rating.
The breaker mounts directly onto a standard DIN rail inside distribution boards, switchgear assemblies and industrial control panels.
ABB System pro M Compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for delivering dependable circuit protection, robust construction and long-term operational reliability across demanding electrical installations.
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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...