Why Choose the ABB S303P-B50 Miniature Circuit Breaker?
The ABB S303P-B50 (2CDS383001R0505) is a premium three-pole miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the trusted ABB S300P series, it combines robust construction, high breaking capacity and reliable switching performance for demanding applications.
Manufactured to recognised IEC and UL standards, the S303P-B50 features a compact DIN rail design with fail-safe screw terminals and flexible top or bottom supply connection, making installation straightforward in industrial control panels, switchgear assemblies and power distribution systems.
With a rated current of 50 A, a Type B tripping characteristic and a 25 kA rated short-circuit breaking capacity, the S303P-B50 is ideal for protecting resistive loads, lighting circuits and general-purpose distribution circuits where rapid fault protection is required.
Key Advantages
- Industrial-grade three-pole miniature circuit breaker.
- 50 A rated current with Type B tripping characteristics.
- Reliable overload and short-circuit protection.
- 25 kA rated breaking capacity for demanding installations.
- Ideal for lighting, resistive loads and general-purpose distribution circuits.
- Compact DIN rail mounting for quick and straightforward installation.
Key Features
- ABB S300P series.
- 3-pole configuration.
- 50 A rated current.
- Type B tripping characteristic.
- Rated operating voltage up to 415 V AC.
- Rated DC voltage up to 125 V DC.
- 25 kA rated breaking capacity.
- Ultimate short-circuit breaking capacity up to 100 kA.
- Fail-safe screw terminals with top or bottom supply connection.
- DIN rail mounting compatible with ABB System pro M Compact accessories.
Reliable Protection for General Electrical Circuits
The ABB S303P-B50 automatically disconnects electrical circuits during overload or short-circuit conditions, helping protect cables, switchgear and connected equipment while improving system reliability and reducing downtime.
Its Type B tripping characteristic provides rapid operation at relatively low overcurrents, making it particularly suitable for resistive loads, lighting circuits, office installations and other applications where high inrush currents are not expected.
Typical Applications
- Commercial electrical installations.
- Lighting distribution circuits.
- General-purpose power distribution.
- Industrial control panels.
- Switchgear assemblies.
- Building services installations.
