Why Choose the ABB 2CDS383103R0205 S303P-B20NA Miniature Circuit Breaker?
The ABB 2CDS383103R0205, also known as the S303P-B20NA, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in industrial and commercial electrical installations. Part of the trusted ABB S300P System pro M compact range, it combines exceptional fault-breaking performance with a compact design, making it ideal for demanding power distribution systems.
Featuring a 3P+N configuration, the S303P-B20NA protects all three phase conductors while incorporating a switched neutral pole. Its Type B tripping characteristic is designed for circuits with low inrush currents, making it particularly suitable for lighting installations, resistive loads, control circuits and commercial electrical distribution systems.
With a rated current of 20 A, a maximum operating voltage of 415 V AC and a 25 kA breaking capacity, the ABB S303P-B20NA delivers reliable circuit protection for switchboards, industrial control panels and commercial distribution boards. Its DIN rail mounting ensures straightforward installation while maximising panel space.
Key Advantages
- Industrial-grade miniature circuit breaker for dependable electrical protection.
- 20 A rated current with Type B tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- 25 kA short-circuit breaking capacity.
- Compact DIN rail mounting for fast installation.
- Reliable overload and short-circuit protection.
Key Features
- ABB S300P System pro M compact series.
- 20 A rated operational current.
- Type B tripping characteristic.
- Three protected poles plus switched neutral.
- 25 kA rated breaking capacity.
- Suitable for AC/DC applications.
- Bidirectional supply capability.
- Contact position indication (Red ON / Green OFF).
- DIN rail mounting.
Reliable Circuit Protection for Industrial Applications
The ABB S303P-B20NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect electrical equipment, wiring and connected systems while improving operational safety and reducing costly downtime.
Its Type B tripping characteristic is particularly suitable for circuits supplying lighting, control equipment and resistive loads where rapid fault clearance is essential. Combined with ABB's proven S300P platform, it provides dependable long-term performance for industrial automation, commercial buildings and OEM machinery.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- Lighting distribution circuits.
- Control panels.
- Building services electrical systems.
- OEM machinery and automation equipment.
