ABB S203C40 3-pole 40 A miniature circuit breaker with C curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£79.18
The ABB S203C40 is a premium 3-pole miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in residential, commercial and industrial electrical installations. As part of the proven ABB System pro M Compact S200 series, it combines dependable thermal-magnetic protection with current-limiting technology and a compact DIN rail design for modern power distribution systems.
Featuring a C curve tripping characteristic, the S203C40 is ideal for circuits with moderate inrush currents, making it suitable for motors, pumps, compressors, HVAC equipment, transformers and general industrial power distribution. Its delayed thermal tripping mechanism protects against overloads, while the electromagnetic tripping mechanism provides rapid short-circuit interruption.
With a rated current of 40 A, a 3-pole configuration and a 6 kA short-circuit breaking capacity, the ABB S203C40 is designed for three-phase systems operating at up to 400 V AC. Its patented twin terminals and compatibility with ABB auxiliary accessories simplify installation and future expansion.
The ABB S203C40 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 ensures dependable protection whilst reducing downtime and improving installation safety.
Its C curve characteristic makes the breaker particularly suitable for motors, compressors, pumps, HVAC systems and industrial machinery that experience moderate temporary starting currents. The current-limiting design helps reduce thermal and mechanical stress during fault conditions.
| Current | 40 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-C40 |
| Product code | 2CDS253001R0404 |
| EAN | 4016779468404 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 40 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Trip characteristic | C Curve |
| Rated operational voltage | 230/400 V AC |
| Maximum operational voltage | 440 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity (Icn) | 6 kA |
| Ultimate short-circuit breaking capacity (Icu) | 20 kA |
| 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 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | approx. 0.375 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203C40 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 S203C40 is a 3-pole miniature circuit breaker for protecting three-phase electrical circuits.
The ABB S203C40 has a 40 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...