ABB S203-Z0.5 three pole 0.5 A Z curve miniature circuit breaker with 6 kA breaking capacity for protecting sensitive electronic and industrial control circuits.
£182.55
The ABB S203-Z0.5 is a high precision three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Designed for dependable overload and short circuit protection, it is particularly suited to sensitive electronic equipment, semiconductor circuits and industrial control systems where very fast fault disconnection is essential.
Featuring a Z tripping characteristic, the S203-Z0.5 is engineered for circuits with very low overload tolerance and rapid magnetic tripping. This makes it ideal for protecting PLCs, instrumentation, electronic control equipment, measuring devices and semiconductor components that require enhanced protection against fault currents.
With a 0.5 A rated current, three-pole configuration and a 6 kA short circuit breaking capacity, this DIN rail mounted miniature circuit breaker provides reliable circuit protection, compact installation and compliance with recognised international electrical standards.
The ABB S203-Z0.5 combines delayed thermal overload protection with an extremely sensitive magnetic trip for short circuit protection. Its Z characteristic provides rapid disconnection during fault conditions, helping protect delicate electronic devices and semiconductor equipment from damage.
The compact design allows efficient installation within industrial control panels, automation cabinets and electrical distribution systems where precision circuit protection is required.
| Current | 0.5 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-Z0.5 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 0.5 A |
| Number of poles | 3 |
| Tripping characteristic | Z |
| Rated operational voltage | 400 V AC |
| Maximum operational voltage | 440 V AC |
| Voltage type | AC/DC |
| Rated frequency | 50 / 60 Hz |
| Breaking capacity | 6 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Failsafe bi-directional cylinder-lift screw terminals |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | approx. 0.336 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-Z0.5 protects sensitive electronic equipment, instrumentation and semiconductor circuits against overloads and short circuits.
A Z curve circuit breaker provides very fast magnetic tripping and is intended for protecting highly sensitive electronic and semiconductor equipment.
This model features a three-pole (3P) configuration for protecting three-phase electrical systems.
The ABB S203-Z0.5 has a rated short circuit breaking capacity of 6 kA.
The circuit breaker is designed for installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
ABB System pro M Compact miniature circuit breakers are trusted by electricians, control panel builders and industrial engineers for reliable protection, high quality construction and dependable long-term performance.
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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...