ABB S303P-Z1NA miniature circuit breaker with a 1 A rating, Type Z tripping characteristic, 3P+N configuration and 25 kA breaking capacity for sensitive industrial electrical protection.
£268.21
The ABB 2CDS383103R0218, also known as the S303P-Z1NA, is a premium miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial electrical installations. As part of the trusted ABB S300P System pro M compact range, it delivers exceptional fault protection, compact dimensions and long-term reliability for demanding power distribution applications.
Featuring a 3P+N configuration, the S303P-Z1NA protects all three phase conductors while incorporating a switched neutral pole. Its Type Z tripping characteristic is specifically engineered for highly sensitive electronic equipment and semiconductor circuits that require extremely fast disconnection under fault conditions and minimal overcurrent tolerance.
With a rated current of 1 A, a maximum operating voltage of 415 V AC and a 25 kA rated short-circuit breaking capacity, the ABB S303P-Z1NA delivers dependable protection for automation systems, instrumentation panels and specialist industrial control equipment. Its compact DIN rail mounting design enables quick installation while optimising panel space.
The ABB S303P-Z1NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, protecting sensitive electronic equipment, PLC systems, instrumentation and semiconductor devices from potentially costly damage while improving operational safety.
Its Type Z tripping characteristic provides exceptionally rapid magnetic tripping compared with conventional breaker curves, making it particularly suitable for circuits where even small overcurrents can damage sensitive components.
| Current | 1 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-Z1NA |
| Manufacturer Part Number | 2CDS383103R0218 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Rated Current | 1 A |
| Tripping Characteristic | Type Z |
| Pole Configuration | 3P+N |
| Protected Poles | 3 |
| Rated Voltage | Up to 415 V AC |
| Voltage Type | AC/DC |
| Frequency | 50 / 60 Hz |
| Rated Short-Circuit Breaking Capacity (Icn) | 25 kA |
| Ultimate Breaking Capacity (Icu) | 100 kA |
| Rated Insulation Voltage (Ui) | 500 V |
| Impulse Withstand Voltage (Uimp) | 6 kV |
| Protection Rating | IP20 |
| Terminal Capacity | 0.75–35 mm² rigid, 0.75–25 mm² flexible |
| Mounting | DIN Rail |
| Operating Temperature | -40°C to +70°C |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Weight | Approx. 0.496 kg |
| EAN | 4016779077187 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects sensitive three-phase electrical circuits against overloads and short circuits, particularly electronic and semiconductor equipment.
The ABB S303P-Z1NA has a rated operational current of 1 A.
Type Z circuit breakers provide extremely fast magnetic tripping, making them ideal for protecting highly sensitive electronic circuits with very low overcurrent tolerance.
The breaker provides a rated short-circuit breaking capacity of 25 kA and an ultimate breaking capacity of 100 kA.
It is designed for installation on a standard DIN rail inside industrial control panels, switchboards and electrical distribution boards.
ABB S300P miniature circuit breakers are trusted by industrial engineers, machine builders and OEM manufacturers worldwide for dependable protection of electrical distribution systems and sensitive industrial electronics.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...