ABB S303P-B6NA 3P+N miniature circuit breaker with a 6 A rated current, Type B tripping characteristic, switched neutral and 25 kA breaking capacity for industrial and commercial distribution circuits.
£149.48
The ABB S303P-B6NA (2CDS383103R0065) is a premium three-phase plus switched neutral (3P+N) miniature circuit breaker (MCB) engineered to provide reliable protection against overloads and short circuits in commercial and industrial electrical installations. As part of the proven ABB S300P series, it delivers high fault-breaking performance and dependable operation for distribution boards, switchgear, control panels and OEM machinery.
The S303P-B6NA features three protected phase poles and one switched neutral pole, enabling simultaneous isolation of all conductors while providing thermal and magnetic protection to the phase conductors. Its compact DIN rail design, fail-safe cylinder-lift screw terminals and top or bottom supply connections simplify installation and maintenance.
With a rated current of 6 A, a Type B tripping characteristic and a rated short-circuit breaking capacity of 25 kA, the S303P-B6NA is ideal for resistive and lightly inductive loads with low inrush currents, including lighting, heating and general-purpose distribution circuits.
The ABB S303P-B6NA automatically disconnects electrical circuits during overload or short-circuit conditions, protecting wiring, equipment and connected loads from electrical damage while helping minimise downtime.
Its Type B tripping characteristic is optimised for circuits with low starting currents, making it particularly suitable for lighting, heating, socket outlets, instrumentation and general-purpose distribution systems requiring switched neutral isolation.
| Current | 6 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-B6NA |
| Product ID | 2CDS383103R0065 |
| EAN | 4016779077392 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 6 A |
| Configuration | 3P+N (3 protected poles + switched neutral) |
| Total number of poles | 4 |
| Number of protected poles | 3 |
| Neutral pole | Switched, unprotected |
| Tripping characteristic | Type B |
| Rated AC voltage | 415 V AC |
| Maximum DC voltage | 125 V DC |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Rated short-circuit breaking capacity (Icn) | 25 kA |
| Ultimate breaking capacity (Icu) | 100 kA |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Modular width | 4 modules |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Weight | Approx. 0.496 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S303P-B6NA protects three-phase electrical circuits against overloads and short circuits while providing switched neutral isolation, making it ideal for lighting, heating and general-purpose distribution applications.
The ABB S303P-B6NA has a rated current of 6 A.
Type B circuit breakers trip quickly at relatively low fault currents, making them ideal for resistive and lightly inductive loads with low inrush currents.
The circuit breaker provides a rated short-circuit breaking capacity of 25 kA to IEC/EN 60898-1 and an ultimate breaking capacity of 100 kA to IEC 60947-2.
The breaker mounts directly onto a standard DIN rail and supports top or bottom supply connections using cables or compatible ABB busbars.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for dependable circuit protection, exceptional breaking performance and long-term reliability in demanding commercial and industrial 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...