ABB S303P-C0.5NA miniature circuit breaker with a 0.5 A rated current, 3P+N configuration, Type C tripping characteristic and 25 kA ultimate breaking capacity.
£191.60
The ABB 2CDS383103R0984, also identified as the S303P-C0.5NA, is an industrial miniature circuit breaker (MCB) designed to protect electrical installations against overloads and short circuits. As part of the ABB System pro M compact S300P series, it combines precise low-current protection with a high short-circuit breaking capacity for demanding control, automation and auxiliary circuits.
Featuring a Type C tripping characteristic, the circuit breaker is suitable for loads that may produce moderate inrush currents during normal operation. Its thermal release provides dependable overload protection, while its magnetic release rapidly disconnects the circuit when a short-circuit fault occurs.
With a rated current of 0.5 A, a 3P+N configuration and an operational voltage of up to 415 V AC, the S303P-C0.5NA is ideal for low-current three-phase control circuits requiring a switched neutral. Its 25 kA ultimate short-circuit breaking capacity, compact DIN-rail format and compatibility with ABB System pro M compact accessories support safe and efficient panel construction.
The ABB S303P-C0.5NA is designed for circuits carrying very low operating currents that may still be exposed to significant prospective short-circuit levels. During an overload, its thermal release disconnects the circuit after a controlled delay. If a short circuit occurs, its magnetic release operates rapidly to limit fault energy and protect conductors and connected equipment.
Its Type C characteristic accommodates the moderate inrush currents associated with control transformers, relays, contactor coils and similar industrial devices. This helps reduce unnecessary tripping while maintaining dependable protection during genuine electrical faults.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-C0.5NA |
| Product ID | 2CDS383103R0984 |
| EAN | 4016779135580 |
| Product type | Miniature circuit breaker |
| Rated current | 0.5 A |
| Pole configuration | 3P+N |
| Protected poles | 3 |
| Neutral pole | Switched |
| Tripping characteristic | Type C |
| Rated operational voltage | Up to 415 V AC |
| DC operational voltage | Up to 125 V DC |
| Rated frequency | 50 / 60 Hz |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 6 kV |
| Ultimate short-circuit breaking capacity | 25 kA |
| Protection function | Overload and short-circuit protection |
| Mounting type | 35 mm DIN rail |
| Applicable standards | International IEC and UL standards |
| Approximate dimensions (H × W × D) | 88 × 70 × 69 mm |
| Installation position | Any |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects sensitive, low-current three-phase industrial circuits against overloads and short circuits, including control, instrumentation and auxiliary power applications.
The circuit breaker has a rated current of 0.5 A.
A Type C characteristic is suitable for circuits with moderate inrush currents, including control transformers, relays, contactor coils and similar industrial loads.
The ABB S303P-C0.5NA provides an ultimate short-circuit breaking capacity of 25 kA.
The breaker mounts onto a standard 35 mm DIN rail inside a suitable control panel, switchboard or electrical distribution enclosure.
ABB System pro M compact S300P miniature circuit breakers deliver precise overload and short-circuit protection for industrial control panels, automation systems, machinery and infrastructure applications.
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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...