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2CDS383103R0034 ABB S303P-C3NA Miniature Circuit Breaker – 3+NP – C – 3 A
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.
£105.38
Why Choose the ABB S303P-C3NA Miniature Circuit Breaker?
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.
Key Advantages
- Industrial-grade 3P+N miniature circuit breaker.
- 3 A rated current for low-current three-phase circuits.
- Type C tripping characteristic accommodates moderate inrush currents.
- High 25 kA short-circuit breaking capacity.
- Switched neutral provides simultaneous isolation of all conductors.
- Fail-safe terminals help prevent incorrect conductor insertion.
Key Features
- ABB System pro M compact S300P series.
- Three protected phase poles plus switched neutral.
- 3 A rated current.
- Type C tripping characteristic.
- Rated operating voltage of 415 V AC.
- 25 kA rated short-circuit breaking capacity.
- Top or bottom supply connection.
- Fail-safe cylinder-lift screw terminals.
- DIN rail mounting for modular distribution systems.
- Compatible with suitable ABB System pro M compact accessories.
Reliable Protection with Switched Neutral Isolation
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.
Typical Applications
- Industrial control and automation panels.
- Instrumentation and monitoring circuits.
- Three-phase distribution boards.
- Small transformers and control equipment.
- Commercial and industrial installations.
- OEM machinery requiring neutral isolation.
Technical Specifications
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| Current | 3 A | |
|---|---|---|
| Phase | Three Phase | |
| Device Type | MCB | |
| Trip Curve | C curve | |
| Breaking Capacity | 25 kA | |
| 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 |
Frequently Asked Questions
What is the ABB S303P-C3NA used for?
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.
What is the rated current of the S303P-C3NA?
The ABB S303P-C3NA has a rated current of 3 A.
What does the 3P+N configuration mean?
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.
What is the breaking capacity of this circuit breaker?
The ABB S303P-C3NA provides a rated short-circuit breaking capacity of 25 kA.
What applications suit a Type C tripping characteristic?
A Type C characteristic is suitable for general industrial circuits and equipment with moderate inrush currents, including control transformers, contactors, instrumentation and automation equipment.
How is the ABB S303P-C3NA installed?
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.
Trusted by Industrial Professionals Worldwide
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.
