Why Choose the ABB S203B16 Miniature Circuit Breaker?
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.
Key Advantages
- Reliable overload and short-circuit protection for three-phase circuits.
- 16 A rated current suitable for lighting, heating and general electrical loads.
- B curve tripping characteristic designed for circuits with low inrush currents.
- 3-pole configuration for simultaneous protection and isolation of three conductors.
- 6 kA rated breaking capacity according to IEC/EN 60898-1.
- Compact DIN rail mounting for efficient installation in distribution boards.
Key Features
- ABB System pro M compact S200 series.
- 16 A rated current.
- 3-pole configuration.
- B trip characteristic.
- 230/400 V AC rated operational voltage.
- 6 kA rated short-circuit breaking capacity.
- Thermal tripping mechanism for overload protection.
- Electromagnetic tripping mechanism for short-circuit protection.
- Current-limiting operation helps reduce fault energy.
- Red and green contact-position indication.
- Standard DIN rail mounting for electrical panels.
Reliable Protection for Three-Phase Circuits
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.
Typical Applications
- Three-phase electrical distribution boards.
- Commercial lighting circuits.
- Resistive heating equipment.
- Socket outlet and general power circuits.
- Industrial control panels.
- Commercial buildings and retail premises.
- OEM machinery and electrical equipment.
