ABB S203P-Z63 three-pole 63 A miniature circuit breaker with Z tripping characteristic for sensitive circuit protection in industrial and commercial electrical systems.
The ABB S203P-Z63 is a high performance three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200P series. Designed for dependable overload and short circuit protection, it is ideal for industrial control panels, commercial distribution boards, automation systems and sensitive electrical circuits requiring fast fault response.
Featuring a Z tripping characteristic, the S203P-Z63 is particularly suited to applications where rapid magnetic tripping is required for sensitive equipment, electronic control systems and instrumentation circuits. Its delayed thermal trip mechanism protects against overloads, while its electromechanical trip mechanism provides fast disconnection during short circuit conditions.
With a 63 A rated current, three-pole configuration and breaking capacity of up to 25 kA at 230 / 400 V AC, the ABB S203P-Z63 provides reliable protection for demanding industrial and commercial applications. Its compact DIN rail mounted format allows straightforward installation within electrical enclosures, switchboards and control panels.
Miniature circuit breakers such as the ABB S203P-Z63 protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. This helps protect cables, connected equipment and control systems from damage caused by excessive current.
The Z curve characteristic provides fast magnetic response, making this breaker suitable for sensitive electrical circuits, control equipment, electronic devices, instrumentation and applications where low fault current thresholds are important. Its compact design and ABB accessory compatibility make it a practical choice for panel builders, OEM machine builders and electrical engineers.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-Z63 |
| Product ID | 2CDS283001R0608 |
| EAN | 4016779593885 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 63 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | Z |
| Rated operational voltage | 400 V AC / 480Y / 277 V AC |
| Rated insulation voltage | 440 V |
| Impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA at 230 / 400 V AC |
| Rated short circuit breaking capacity | 15 kA at 400 V AC |
| Energy limiting class | 3 |
| Terminal type | Screw terminals |
| Connectable conductor cross section | 0.75-25 mm² solid, 0.75-16 mm² stranded |
| Mounting type | DIN rail |
| Protection rating | IP20 terminals, IP40 when installed in an enclosure |
| Operating temperature | -25 to +55 °C |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.42 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 No. 235 |
The S203P-Z63 is used to protect three-phase electrical circuits against overloads and short circuits in industrial, commercial and automation applications.
The Z curve provides fast magnetic tripping and is commonly used for sensitive circuits, control equipment and applications requiring rapid fault disconnection.
The ABB S203P-Z63 has a 63 A rated current.
The S203P-Z63 is a three-pole miniature circuit breaker.
The breaker is designed for DIN rail mounting inside electrical control panels, switchboards and distribution boards.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, OEM manufacturers and electrical engineers worldwide for dependable circuit protection, high breaking performance and long service life.
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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...