ABB S303P-Z40 three-pole miniature circuit breaker with a 40 A rated current, Type Z tripping characteristic and 25 kA breaking capacity for sensitive industrial circuit protection.
£219.61
The ABB S303P-Z40 (2CDS383001R0558) is a premium three-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial electrical installations. As part of the trusted ABB S300P series, it combines rapid fault response, robust construction and high breaking capacity for reliable protection of sensitive three-phase electrical equipment.
Manufactured in accordance with recognised IEC and UL standards, the S303P-Z40 features a compact DIN rail design with fail-safe screw terminals and flexible top or bottom supply connection, making installation straightforward in industrial control panels, switchgear assemblies and power distribution systems.
With a rated current of 40 A, a Type Z tripping characteristic and a 25 kA rated short-circuit breaking capacity, the S303P-Z40 is particularly suited to protecting PLC systems, instrumentation, electronic control equipment and semiconductor devices where rapid fault disconnection is essential.
The ABB S303P-Z40 automatically disconnects electrical circuits during overload or short-circuit conditions, helping protect cables, PLCs, instrumentation and other sensitive electronic equipment while reducing downtime and preventing costly electrical damage.
Its Type Z tripping characteristic provides rapid operation at relatively low fault currents, making it especially suitable for semiconductor devices, electronic control systems and measurement equipment where fast protection is essential.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-Z40 |
| Product ID | 2CDS383001R0558 |
| EAN | 4016779077613 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | Type Z |
| Rated AC voltage | 415 V AC |
| Rated DC voltage | 125 V DC |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 6 kV |
| Rated breaking capacity | 25 kA |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.37 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S303P-Z40 protects sensitive three-phase industrial circuits against overloads and short circuits, making it ideal for PLCs, instrumentation and electronic control equipment.
This miniature circuit breaker has a 40 A rated current.
Type Z circuit breakers provide rapid disconnection at relatively low fault currents, making them suitable for protecting sensitive electronic and semiconductor equipment.
The circuit breaker offers a rated short-circuit breaking capacity of 25 kA.
The breaker mounts directly onto a standard DIN rail inside industrial control panels, switchboards and electrical distribution systems.
ABB S300P miniature circuit breakers are trusted by electrical engineers, OEMs and panel builders for delivering dependable protection, high breaking performance and reliable operation in demanding industrial environments.
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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...