ABB S303P-C3NA 3P+N miniature circuit breaker with a 3 A rated current, Type C tripping characteristic, switched neutral and 25 kA breaking capacity for industrial control and distribution circuits.
£191.60
The ABB S303P-C3NA (2CDS383103R0034) is a high-performance three-phase plus switched neutral miniature circuit breaker designed to protect industrial and commercial electrical installations against overloads and short circuits. Part of the robust ABB S300P series, it combines dependable circuit protection with a high breaking capacity for demanding distribution and control applications.
The S303P-C3NA incorporates three protected phase poles and an additional switched neutral pole. This 3P+N configuration enables simultaneous isolation of all conductors while providing thermal and magnetic protection to the three phase conductors. Fail-safe screw terminals and DIN rail mounting support secure wiring and straightforward installation within distribution boards and control panels.
With a rated current of 3 A, a Type C tripping characteristic and a short-circuit breaking capacity of 25 kA, the S303P-C3NA is suitable for low-current three-phase circuits, automation equipment, instrumentation and industrial loads with moderate inrush currents.
The ABB S303P-C3NA uses a delayed thermal release to protect conductors against sustained overloads and an electromagnetic release to disconnect the circuit rapidly during a short circuit. Its current-limiting design helps reduce the electrical and thermal stress placed on cables and connected equipment during fault conditions.
The Type C characteristic is suitable for circuits containing equipment with moderate starting currents. Combined with switched neutral isolation, this makes the circuit breaker well suited to industrial control systems, instrumentation supplies and three-phase distribution circuits where complete conductor isolation is required.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-C3NA |
| Product ID | 2CDS383103R0034 |
| EAN | 4016779077446 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 3 A |
| Total number of poles | 4 |
| Number of protected poles | 3 |
| Configuration | 3P+N |
| Neutral pole | Switched, unprotected |
| Tripping characteristic | Type C |
| Rated operating voltage | 415 V AC |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Rated short-circuit breaking capacity | 25 kA |
| Frequency | 50 / 60 Hz |
| Electrical endurance | Up to 20,000 operating cycles |
| Conductor capacity | 0.75–35 mm² |
| Protection rating | IP20 when installed |
| Mounting type | DIN rail |
| Modular width | 4 modules |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Operating temperature | -40°C to +70°C |
| Applicable standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 and CSA 22.2 No. 235 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S303P-C3NA protects low-current three-phase circuits against overloads and short circuits while simultaneously switching the neutral conductor. It is suitable for industrial control, automation and distribution applications.
The ABB S303P-C3NA has a rated current of 3 A.
The breaker has three thermally and magnetically protected phase poles plus one switched neutral pole. All four conductors are disconnected together, but the neutral pole does not provide overcurrent protection.
The ABB S303P-C3NA provides a rated short-circuit breaking capacity of 25 kA.
A Type C characteristic is suitable for general industrial circuits and equipment with moderate inrush currents, including control transformers, contactors, instrumentation and automation equipment.
The circuit breaker mounts onto a standard DIN rail and supports supply connections from either the top or bottom using suitable cables or compatible busbars.
ABB System pro M compact circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for dependable protection, high breaking performance and secure installation in demanding industrial electrical systems.
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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...