ABB S303P-C50NA miniature circuit breaker with a 50 A current rating, Type C tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial and commercial electrical protection.
£205.20
The ABB S303P-C50NA, product code 2CDS383103R0504, is a premium miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the trusted ABB System pro M compact S300P series, it offers exceptional performance, high breaking capacity and long-term reliability for demanding applications.
Featuring a Type C tripping characteristic, the S303P-C50NA is ideal for protecting circuits with moderate inrush currents, making it suitable for power distribution, lighting systems, commercial equipment and general industrial loads. Its thermal and magnetic trip mechanisms ensure fast fault clearance while minimising nuisance tripping during normal operation.
With a rated current of 50 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-C50NA is perfectly suited to industrial distribution boards, commercial switchboards and OEM machinery. Its compact DIN rail mounting design enables straightforward installation and compatibility with ABB System pro M compact accessories.
Miniature circuit breakers automatically disconnect electrical circuits whenever overloads or short circuits occur. The ABB S303P-C50NA combines thermal overload protection with rapid magnetic fault interruption, helping safeguard cables, switchgear, machinery and connected electrical equipment against excessive current and fault conditions.
Its Type C tripping characteristic is ideally suited to general-purpose industrial and commercial installations where moderate inrush currents are expected, providing dependable protection without unnecessary nuisance tripping.
| Current | 50 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-C50NA |
| Product ID | 2CDS383103R0504 |
| Product type | Miniature circuit breaker |
| Rated current | 50 A |
| Tripping characteristic | Type C |
| Pole configuration | 3P+N |
| Total poles | 4 |
| Protected poles | 3 |
| Rated operational voltage | 415 V AC |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Maximum AC voltage | 480Y/277 V AC |
| Maximum DC voltage | 125 V DC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA (IEC 60947-2), 15 kA at 440 V AC |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | DIN rail mounting |
| Terminal capacity | 0.75 to 35 mm² solid, 0.75 to 25 mm² stranded |
| Mechanical endurance | 20,000 operating cycles |
| Electrical endurance | 20,000 operating cycles |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| EAN | 4016779076883 |
| Country of origin | Germany |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S303P-C50NA protects three-phase industrial and commercial electrical circuits against overloads and short circuits.
The S303P-C50NA has a rated current of 50 A.
Type C circuit breakers are designed for general-purpose circuits with moderate inrush currents, including distribution systems, lighting and motor loads.
The breaker provides a rated short-circuit breaking capacity of 25 kA in accordance with IEC 60947-2.
The breaker mounts onto a standard DIN rail inside electrical distribution boards, industrial control panels and commercial switchboards.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electrical engineers, contractors and panel builders for dependable circuit protection, excellent performance and long-term reliability.
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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...