ABB S303P-B25NA miniature circuit breaker with a 25 A rating, Type B tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£156.01
The ABB 2CDS383103R0255, also known as the S303P-B25NA, is a premium miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the proven ABB S300P System pro M compact range, it combines a compact design with exceptional fault-clearing performance and worldwide compliance for demanding power distribution systems.
Featuring a 3P+N configuration, the S303P-B25NA protects all three phase conductors while incorporating a switched neutral pole. Its Type B tripping characteristic makes it ideal for lighting circuits, resistive loads, commercial installations and control circuits where low inrush currents require rapid fault disconnection.
With a rated current of 25 A, a rated operating voltage of 415 V AC and a 25 kA short-circuit breaking capacity, the ABB S303P-B25NA delivers reliable protection for switchboards, OEM machinery, commercial buildings and industrial control panels. Its DIN rail mounting enables quick installation while maximising enclosure space.
The ABB S303P-B25NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping to protect wiring, connected equipment and electrical infrastructure while reducing downtime and improving personnel safety.
Its Type B tripping characteristic provides rapid operation on relatively low fault currents, making it particularly suitable for lighting systems, commercial distribution circuits and control equipment where sensitive fault protection is required.
| Current | 25 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-B25NA |
| Manufacturer Part Number | 2CDS383103R0255 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Rated Current | 25 A |
| Tripping Characteristic | Type B |
| Configuration | 3P+N |
| Protected Poles | 3 |
| Rated Voltage | Up to 415 V AC |
| Maximum Operating Voltage | 480Y/277 V AC, 125 V DC (UL/CSA) |
| Voltage Type | AC/DC |
| Frequency | 50 / 60 Hz |
| Rated Short-Circuit Breaking Capacity (Icn) | 25 kA |
| Rated Insulation Voltage (Ui) | 500 V |
| Impulse Withstand Voltage (Uimp) | 6 kV |
| Protection Rating | IP20 |
| Connection Capacity | 0.75–35 mm² rigid, 0.75–25 mm² flexible |
| Operating Temperature | -40°C to +70°C |
| Mounting | DIN Rail |
| Module Width | 4 modules |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Weight | Approx. 0.496 kg |
| EAN | 4016779077156 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits in industrial and commercial installations.
The ABB S303P-B25NA has a rated operational current of 25 A.
The breaker uses a Type B tripping characteristic, making it ideal for lighting circuits, resistive loads and low inrush current applications.
The ABB S303P-B25NA provides a rated short-circuit breaking capacity of 25 kA.
It is designed for installation on a standard DIN rail inside switchboards, distribution boards and industrial control panels.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers worldwide for delivering dependable overload and short-circuit protection in demanding industrial and commercial electrical installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...