Why Choose the ABB S303P-B20 Miniature Circuit Breaker?
The ABB S303P-B20 is a premium three-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial, commercial and OEM electrical installations. As part of the trusted ABB System pro M compact S300P series, it delivers exceptional breaking capacity, reliable operation and compliance with international IEC and UL standards.
Built for demanding low voltage applications, the S303P-B20 combines robust construction with a compact DIN rail mounted design, allowing quick installation inside distribution boards, switchboards and industrial control panels. Its integrated trip indication, fail-safe terminals and compatibility with ABB System pro M accessories simplify maintenance while ensuring long-term reliability.
Featuring a 20 A rated current, a B curve tripping characteristic and a 25 kA breaking capacity, this miniature circuit breaker is ideally suited for protecting lighting circuits, resistive loads and general electrical distribution where rapid fault protection is required.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial and commercial applications.
- 20 A rated current suitable for a wide variety of electrical circuits.
- B curve tripping characteristic provides rapid overload protection.
- 25 kA breaking capacity for demanding fault conditions.
- Integrated trip indicator for quick fault identification.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S300P series.
- 20 A rated current.
- Three protected poles.
- B curve tripping characteristic.
- 415 V AC rated operational voltage.
- 25 kA short-circuit breaking capacity.
- IP20 protection rating.
- 35 mm DIN rail mounting with screw terminals.
Reliable Circuit Protection for Industrial Installations
The ABB S303P-B20 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, protecting wiring, switchgear and connected equipment from electrical damage. Its B curve characteristic provides fast tripping at relatively low overcurrent levels, making it particularly suitable for lighting circuits and resistive electrical loads.
The ABB S300P range is trusted worldwide by electrical contractors, OEM machine builders and panel manufacturers for delivering dependable protection, straightforward installation and excellent long-term reliability in industrial and commercial environments.
Typical Applications
- Commercial electrical distribution boards.
- Industrial control panels.
- Lighting circuits.
- Building services installations.
- OEM machinery.
- General low voltage electrical distribution.
