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2CDS273334R0358 ABB ST203M-Z5 MCB 15kA 3P Z 5A UL1077
ABB ST203M-Z5 is a 5 A three-pole Z-characteristic miniature circuit breaker with a 15 kA short-circuit breaking capacity designed for supplementary protection of sensitive low-current industrial electrical equipment.
£100.86
Why Choose the ABB ST203M-Z5 Miniature Circuit Breaker?
The ABB ST203M-Z5 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide dependable supplementary overcurrent and short-circuit protection for industrial equipment, control systems and sensitive electrical circuits. As part of the ABB ST200M miniature circuit breaker series, it combines reliable circuit protection with a compact modular format for professional DIN-rail installations.
Featuring a Z tripping characteristic, the ST203M-Z5 is particularly suited to circuits where a sensitive magnetic response is required and normal inrush currents are relatively low. This makes it a practical choice for electronic equipment, control circuits, instrumentation and other applications requiring responsive overcurrent protection.
With a rated current of 5 A, a three-pole configuration and a short-circuit breaking capacity of 15 kA, the ST203M-Z5 provides robust supplementary protection for low-current three-pole circuits. ABB order code 2CDS273334R0358 identifies this specific 5 A Z-characteristic model within ABB's UL 1077 miniature circuit breaker range.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial and control applications.
- 5 A rated current suitable for low-current equipment and control circuits.
- 15 kA short-circuit breaking capacity for robust fault protection.
- Z tripping characteristic suited to sensitive circuits with relatively low inrush currents.
- Designed for UL 1077 supplementary circuit protection applications.
- DIN-rail format enables straightforward integration into electrical panels, machinery and automation equipment.
Key Features
- ABB ST200M miniature circuit breaker series.
- 5 A rated current.
- 3-pole configuration.
- Z tripping characteristic.
- 15 kA short-circuit breaking capacity.
- Thermal-magnetic circuit protection.
- Designed for UL 1077 supplementary protection.
- Compact modular construction for DIN-rail installation.
Responsive Protection for Sensitive Electrical Circuits
Miniature circuit breakers such as the ABB ST203M-Z5 automatically interrupt electrical current when an overload or short-circuit condition occurs. This helps protect conductors and connected equipment while providing resettable circuit protection that supports convenient fault recovery and maintenance in industrial installations.
The Z-characteristic response makes the ST203M-Z5 particularly appropriate for sensitive circuits where responsive magnetic protection is required. Combined with its 5 A rating and three-pole construction, it is well suited to supplementary protection of industrial control electronics, instrumentation, automation systems and other low-current equipment.
Typical Applications
- Industrial control and automation equipment.
- Electrical control panels and cabinets.
- Sensitive low-current three-pole circuits.
- Electronic control equipment.
- Instrumentation and measurement circuits.
- OEM machinery requiring UL 1077 supplementary protection.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| Order code | 2CDS273334R0358 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 5 A | |
| Number of poles | 3 | |
| Number of protected poles | 3 | |
| Tripping characteristic | Z | |
| Short-circuit breaking capacity | 15 kA | |
| Protection principle | Thermal-magnetic | |
| Standard / product group | UL 489 / UL 1077 MCB | |
| Application standard | UL 1077 | |
| Mounting type | DIN rail | |
| Modular width | 3 modules |
Frequently Asked Questions
What is the ABB ST203M-Z5 used for?
The ST203M-Z5 is a three-pole miniature circuit breaker designed to provide supplementary overload and short-circuit protection for low-current industrial equipment, control systems and sensitive electrical circuits.
What is the rated current of the ST203M-Z5?
The ABB ST203M-Z5 has a rated current of 5 A.
What does the Z characteristic mean?
The Z tripping characteristic provides a sensitive magnetic response and is suited to circuits with relatively low inrush currents, including electronic control, instrumentation and other sensitive electrical loads.
What is the breaking capacity of the ST203M-Z5?
The ST203M-Z5 has a 15 kA short-circuit breaking capacity, providing robust fault protection for suitable industrial equipment and supplementary circuit-protection applications.
What is the ABB order code for the ST203M-Z5?
The ABB order code for the ST203M-Z5 5 A three-pole Z-characteristic MCB is 2CDS273334R0358.
Trusted Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial machinery, electrical panels and automation equipment, combining reliable protection performance with a modular DIN-rail design.
