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S203-C50 Miniature Circuit Breaker – 3P – C – 50 A
ABB S203C50 3-pole 50 A miniature circuit breaker with C curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£46.15
Why Choose the ABB S203C50 Miniature Circuit Breaker?
The ABB S203C50 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 proven ABB System pro M Compact S200 series, it combines reliable thermal-magnetic protection, current-limiting technology and compact DIN rail mounting for modern power distribution systems.
Featuring a C curve tripping characteristic, the S203C50 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 50 A, a 3-pole configuration and a 6 kA short-circuit breaking capacity, the ABB S203C50 is designed for three-phase electrical systems operating at up to 400 V AC. Its patented twin terminals and compatibility with ABB auxiliary accessories simplify installation and future expansion.
Key Advantages
- Reliable 3-pole miniature circuit breaker for overload and short-circuit protection.
- 50 A rated current suitable for commercial and industrial power distribution.
- C curve tripping characteristic designed for circuits with moderate inrush currents.
- 6 kA breaking capacity for dependable fault protection.
- Current-limiting technology helps minimise fault energy.
- Patented twin terminals simplify wiring.
- Compact DIN rail mounting.
Key Features
- ABB System pro M Compact S200 series.
- Model S203-C50.
- 50 A rated current.
- 3-pole configuration.
- C trip characteristic.
- 230/400 V AC rated operational voltage.
- 6 kA rated short-circuit breaking capacity.
- Thermal and electromagnetic tripping mechanisms.
- Current-limiting operation.
- Bottom-mounted auxiliary contact compatibility.
- Clear red/green contact position indication.
- DIN rail mounting.
Reliable Protection for Three-Phase Electrical Systems
The ABB S203C50 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 provides 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.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- Motor and pump circuits.
- HVAC equipment.
- Industrial control panels.
- OEM machinery.
- Automation systems.
- Three-phase power distribution.
Technical Specifications
Tick the specs you need, then view products that match.
| Breaking Capacity | 6 kA | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | C curve | |
| HS Code | 85362010 | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-C50 | |
| Product code | 2CDS253001R0504 | |
| EAN | 4016779551069 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 50 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 insulation voltage | 500 V AC phase-to-phase, 250 V AC phase-to-earth | |
| Rated frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity (Icn) | 6 kA | |
| Ultimate short-circuit breaking capacity (Icu) | 20 kA | |
| 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) | 88 × 52.5 × 69 mm | |
| Weight | approx. 0.375 kg |
Frequently Asked Questions
What is the ABB S203C50 used for?
The ABB S203C50 protects three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial installations.
What does the C curve characteristic mean?
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.
How many poles does the ABB S203C50 have?
The ABB S203C50 is a 3-pole miniature circuit breaker designed to protect three-phase electrical circuits.
What is the rated current?
The ABB S203C50 has a 50 amp current rating.
How is the breaker installed?
The breaker mounts directly onto a standard DIN rail inside distribution boards, switchgear assemblies and industrial control panels.
Trusted by Electrical Professionals Worldwide
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.
