ABB S303P-Z0.5NA miniature circuit breaker with a 0.5 A rating, Type Z tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£268.21
The ABB 2CDS383103R0158, also known as the S303P-Z0.5NA, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in industrial electrical systems. As part of the proven ABB S300P System pro M compact series, it combines outstanding fault-breaking performance with compact dimensions, making it ideal for demanding power distribution applications.
The breaker features a 3P+N configuration, protecting all three phase conductors while switching the neutral conductor. Its Type Z tripping characteristic is specifically designed for highly sensitive electronic circuits and semiconductor equipment that require rapid disconnection under fault conditions with very low overcurrent tolerance.
With a rated current of 0.5 A, a maximum operating voltage of 415 V AC and a high 25 kA breaking capacity, the S303P-Z0.5NA delivers exceptional protection for specialist industrial control systems, instrumentation and sensitive electronic equipment. Its compact DIN rail mounting design enables quick installation in switchboards and control panels.
The ABB S303P-Z0.5NA automatically disconnects electrical circuits during overload or short-circuit conditions, protecting valuable electronic equipment, control circuits and instrumentation from damage. The fast-acting Type Z characteristic provides enhanced protection for circuits with very low permissible overcurrent levels.
Designed for demanding industrial environments, the S300P range combines high breaking performance with dependable long-term operation, making it suitable for OEM machinery, automation systems and specialist electronic installations.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-Z0.5NA |
| Product ID | 2CDS383103R0158 |
| Product type | Miniature circuit breaker |
| Rated current | 0.5 A |
| Tripping characteristic | Type Z |
| Number of poles | 3P+N |
| Number of protected poles | 3 |
| Rated operating 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 | 500 V |
| Impulse withstand voltage | 6 kV |
| Protection rating | IP20 terminals |
| Mounting type | DIN rail mounting |
| Module width | 4 modules |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| EAN | 4016779077279 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects sensitive three-phase electrical circuits against overloads and short circuits, particularly electronic equipment requiring rapid fault disconnection.
The ABB S303P-Z0.5NA has a rated operational current of 0.5 A.
Type Z circuit breakers provide very fast magnetic tripping and are intended for protecting highly sensitive electronic circuits with minimal overcurrent tolerance.
The breaker provides a rated short-circuit breaking capacity of 25 kA and an ultimate breaking capacity of 100 kA.
The breaker is designed for installation on a standard DIN rail inside electrical distribution boards and industrial control panels.
ABB S300P miniature circuit breakers are trusted by industrial engineers, panel builders and OEM manufacturers to provide dependable protection for electrical distribution systems and sensitive industrial equipment.
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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...