ABB S303P-Z3NA miniature circuit breaker with a 3 A current rating, Type Z tripping characteristic, 3P+N configuration and high breaking capacity for industrial circuit protection.
£268.21
The ABB S303P-Z3NA, product code 2CDS383103R0318, is a high-performance miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the dependable ABB System pro M compact S300P series, it provides reliable circuit protection for demanding applications where high breaking capacity and precise tripping performance are required.
This miniature circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromagnetic tripping mechanism for rapid short-circuit protection. Its Type Z tripping characteristic offers highly sensitive protection, making it particularly suitable for circuits containing electronic equipment, control devices, PLC systems and other components with low short-circuit withstand levels.
With a rated current of 3 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-Z3NA is suitable for three-phase industrial distribution and control circuits. Its DIN rail mounting design, integrated trip indication and compatibility with ABB System pro M compact accessories simplify installation, maintenance and system expansion.
Miniature circuit breakers automatically disconnect an electrical circuit when excessive current is detected. Thermal protection responds to sustained overload conditions, while electromagnetic protection operates rapidly during short circuits, helping prevent cable damage, equipment failure and potentially hazardous electrical faults.
The Type Z characteristic of the ABB S303P-Z3NA is designed for applications requiring a particularly fast response to relatively low levels of fault current. This makes the breaker well suited to protecting sensitive electronic loads, semiconductor devices, instrumentation and industrial control equipment.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-Z3NA |
| Product ID | 2CDS383103R0318 |
| Product type | Miniature circuit breaker |
| Rated current | 3 A |
| Tripping characteristic | Type Z |
| Number of poles | 3P+N |
| Rated operational voltage | Up to 415 V AC |
| Breaking capacity | Up to 25 kA |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 installed, up to IP40 in a suitable enclosure |
| Mounting type | DIN rail mounting |
| Operating temperature | -40 to +70 °C |
| Approximate dimensions (H × W × D) | 88 × 70 × 69 mm |
| Net weight | approx. 0.37 kg |
| EAN | 4016779077095 |
| Country of origin | Germany |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S303P-Z3NA protects industrial electrical circuits and connected equipment against overloads and short circuits.
The S303P-Z3NA has a rated current of 3 A.
Type Z breakers provide highly sensitive short-circuit protection and are commonly used for electronic equipment, semiconductor devices and industrial control circuits.
The breaker has a 3P+N configuration, providing three protected phase poles and a simultaneously switched neutral pole.
The S303P-Z3NA is designed for mounting on a standard DIN rail inside an electrical distribution board, control cabinet or industrial enclosure.
ABB System pro M compact miniature circuit breakers are widely specified by electrical engineers, panel builders and automation professionals for reliable protection, high technical performance and compatibility with modern industrial installations.
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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...