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2CDS383103R0065 ABB S303P-B6NA Miniature Circuit Breaker – 3+NP – B – 6 A
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.
£82.21
Why Choose the ABB S303P-B6NA Miniature Circuit Breaker?
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.
Key Advantages
- Industrial-grade 3P+N miniature circuit breaker.
- 6 A rated current for three-phase distribution circuits.
- Type B tripping characteristic for low inrush current applications.
- 25 kA short-circuit breaking capacity.
- Switched neutral provides simultaneous isolation of all conductors.
- Compact DIN rail mounting with fail-safe terminals.
Key Features
- ABB S300P series.
- 3 protected poles + switched neutral (3P+N).
- 6 A rated current.
- Type B tripping characteristic.
- Rated operating voltage: 415 V AC.
- Maximum operating voltage: 125 V DC.
- 25 kA rated breaking capacity (Icn).
- 100 kA ultimate breaking capacity (Icu) to IEC 60947-2.
- Rated insulation voltage: 500 V.
- Rated impulse withstand voltage: 6 kV.
Reliable Protection for Low Inrush Current 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.
Typical Applications
- Commercial distribution boards.
- Industrial control panels.
- Lighting circuits.
- Heating systems.
- Instrumentation and monitoring equipment.
- OEM machinery with switched neutral requirements.
Technical Specifications
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| Breaking Capacity | 25 kA | |
|---|---|---|
| Current | 6 A | |
| Phase | Three Phase | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| 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 |
Frequently Asked Questions
What is the ABB S303P-B6NA used for?
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.
What is the rated current of this circuit breaker?
The ABB S303P-B6NA has a rated current of 6 A.
What does the Type B tripping characteristic provide?
Type B circuit breakers trip quickly at relatively low fault currents, making them ideal for resistive and lightly inductive loads with low inrush currents.
What is the breaking capacity of the S303P-B6NA?
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.
How is the ABB S303P-B6NA installed?
The breaker mounts directly onto a standard DIN rail and supports top or bottom supply connections using cables or compatible ABB busbars.
Trusted by Industrial Professionals Worldwide
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.
