ABB S303P-Z50 three-pole miniature circuit breaker with a 50 A rated current, Type Z tripping characteristic and breaking capacity of up to 25 kA for sensitive industrial circuit protection.
£235.29
The ABB S303P-Z50 (2CDS383001R0578) is a high-performance three-pole miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the robust ABB S300P series, it combines fast fault response, high breaking performance and dependable operation for sensitive three-phase circuits.
Manufactured in accordance with international IEC and UL product standards, the S303P-Z50 is suitable for industrial control panels, switchgear assemblies, automation systems and power distribution equipment. Its compact modular construction, fail-safe terminals and DIN rail mounting help simplify installation while providing secure and reliable conductor connections.
With a rated current of 50 A, a Type Z tripping characteristic and a rated short-circuit breaking capacity of up to 25 kA, the S303P-Z50 is particularly suitable for protecting sensitive electronic equipment, PLC systems, instrumentation and semiconductor-based loads requiring rapid fault disconnection.
The ABB S303P-Z50 automatically disconnects the electrical supply when an overload or short circuit occurs. This helps protect cables, electronic controls and connected equipment against damage while reducing the risk of production interruptions and costly system downtime.
Its Type Z tripping characteristic provides rapid magnetic operation at relatively low fault-current levels. This makes the circuit breaker particularly suitable for sensitive electronic devices, semiconductor components, instrumentation and industrial automation equipment where fast disconnection is essential.
| Current | 50 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-Z50 |
| Product ID | 2CDS383001R0578 |
| EAN | 4016779077590 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 50 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | Type Z |
| Rated AC voltage | 415 V AC |
| Maximum DC voltage | 125 V DC |
| Rated breaking capacity | Up to 25 kA |
| Frequency | 50 / 60 Hz |
| Terminal type | Fail-safe screw terminal |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Modular width | 3 modules |
| Dimensions (H × W × D) | Approx. 88 × 52.5 × 69 mm |
| Weight | Approx. 0.37 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S303P-Z50 protects sensitive three-phase industrial circuits against overloads and short circuits, including circuits supplying PLCs, instrumentation and electronic control equipment.
The ABB S303P-Z50 has a rated current of 50 A.
Type Z circuit breakers provide rapid disconnection at relatively low fault-current levels, making them suitable for protecting sensitive electronic and semiconductor equipment.
The circuit breaker provides a short-circuit breaking capacity of up to 25 kA, depending on the applicable operating voltage and standard.
The breaker mounts directly onto a standard DIN rail and supports supply connections from either the top or bottom using suitable cables or compatible busbars.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for dependable circuit protection, high breaking performance and reliable operation in demanding 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...