ABB S203B16 three-pole 16 A miniature circuit breaker with a B curve tripping characteristic and 6 kA rated breaking capacity for overload and short-circuit protection.
£78.09
The ABB S203B16 is a high-quality 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. Part of the proven ABB System pro M compact S200 series, it provides reliable circuit protection for residential, commercial and industrial electrical distribution systems.
Featuring a B curve tripping characteristic, the S203B16 is suitable for circuits with relatively low inrush currents, including lighting, heating, socket outlets and resistive electrical loads. Its thermal-magnetic operating mechanism combines delayed overload protection with rapid electromagnetic disconnection during short-circuit conditions.
With a rated current of 16 A, a 3-pole configuration and a rated operational voltage of 230/400 V AC, the ABB S203B16 is ideal for protecting three-phase electrical circuits. Its compact DIN rail format enables straightforward installation within distribution boards, consumer units, machinery panels and industrial control enclosures.
The ABB S203B16 automatically disconnects an electrical circuit when excessive current is detected. Its delayed thermal mechanism responds to sustained overload conditions, while its electromagnetic mechanism provides rapid disconnection during short circuits.
The B curve characteristic is designed for electrical loads with limited starting currents. This makes the breaker particularly suitable for lighting systems, resistive heating equipment, socket circuits and general-purpose three-phase distribution applications where dependable protection and controlled tripping are required.
| Current | 16 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200 |
| Model | S203-B16 |
| Product code | 2CDS253001R0165 |
| EAN | 4016779469005 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 16 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Trip characteristic | B Curve |
| Rated operational voltage | 230/400 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit capacity | 6 kA |
| Ultimate short-circuit breaking capacity at 400 V AC | 10 kA |
| Rated impulse withstand voltage | 4 kV |
| Tripping technology | Thermal-magnetic |
| Energy-limiting class | 3 |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077 |
| Mounting type | DIN rail |
| Module width | 3 modules |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203B16 protects three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial installations.
The miniature circuit breaker has a rated current of 16 A.
A B curve circuit breaker is designed for circuits with relatively low inrush currents, including lighting, heating, socket outlets and resistive electrical loads.
The ABB S203B16 has a 3-pole configuration, allowing three conductors in a three-phase circuit to be protected and disconnected simultaneously.
The breaker is designed for mounting on a standard DIN rail inside electrical distribution boards, control panels and machinery enclosures.
ABB System pro M compact miniature circuit breakers are widely specified by electrical contractors, panel builders and industrial engineers for reliable protection, robust construction and consistent performance in modern 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...