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2CDS273334R0538 ABB ST203M-Z32 Miniature Circuit Breaker 15 kA 3P Z 32 A UL1077
ABB ST203M-Z32 is a 32 A three-pole Z-curve miniature circuit breaker with 15 kA breaking capacity, designed for sensitive supplementary overload and short-circuit protection in UL 1077 applications.
£105.08
Why Choose the ABB ST203M-Z32 Miniature Circuit Breaker?
The ABB ST203M-Z32 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable supplementary overload and short-circuit protection for sensitive electrical circuits and equipment. As part of the robust ABB ST200M series, it combines a Z tripping characteristic, 32 A rated current and three poles in a compact modular format.
Designed for supplementary protection applications in accordance with UL 1077, the ST203M-Z32 is particularly suitable for sensitive control, electronic and instrumentation circuits where rapid response to overcurrent conditions is required. Its Z characteristic provides sensitive instantaneous tripping, helping protect loads and components that tolerate only limited overcurrent.
With a rated current of 32 A, a 15 kA short-circuit breaking capacity and three-pole configuration, the ST203M-Z32 provides dependable protection for sensitive multi-pole circuits. Its compact modular construction supports straightforward DIN-rail installation inside electrical control panels, machinery cabinets and industrial automation systems.
Key Advantages
- Reliable three-pole miniature circuit breaker for supplementary circuit protection.
- 32 A rated current for sensitive electrical and control circuits.
- Z tripping characteristic for sensitive response to overcurrent conditions.
- 15 kA short-circuit breaking capacity for robust fault protection.
- Designed for supplementary protection in accordance with UL 1077.
- Compact modular construction for straightforward DIN-rail installation.
Key Features
- ABB ST200M miniature circuit breaker series.
- 32 A rated current.
- Three-pole configuration.
- Z tripping characteristic.
- 15 kA breaking capacity.
- Thermal-magnetic overload and short-circuit protection.
- Sensitive trip characteristic for electronic, instrumentation and control circuits.
- Compact DIN-rail mounting design for electrical control panels.
Sensitive Circuit Protection for Industrial Equipment
Miniature circuit breakers such as the ABB ST203M-Z32 automatically disconnect a circuit when excessive current occurs due to an overload or short circuit. Thermal and magnetic tripping mechanisms provide protection against sustained overloads and fault currents while allowing the breaker to be reset after the cause of the fault has been identified and corrected.
The Z tripping characteristic is designed for applications requiring sensitive instantaneous overcurrent protection. This makes the ST203M-Z32 well suited to electronic equipment, control systems, instrumentation and other circuits where rapid fault interruption can help protect sensitive components.
Typical Applications
- Industrial automation and control circuits.
- Electronic equipment and sensitive loads.
- Instrumentation and measurement circuits.
- PLC and industrial control panel circuits.
- Auxiliary, monitoring and signalling circuits.
- Supplementary overcurrent protection applications requiring UL 1077 compliance.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS273334R0538 | |
| Product type | Miniature circuit breaker (MCB) / supplementary protector | |
| Rated current | 32 A | |
| Number of poles | 3 | |
| Tripping characteristic | Z | |
| Short-circuit breaking capacity | 15 kA | |
| Protection principle | Thermal-magnetic | |
| Standard | UL 1077 | |
| Mounting type | DIN-rail mounting |
Frequently Asked Questions
What is the ABB ST203M-Z32 used for?
The ST203M-Z32 is a three-pole miniature circuit breaker designed to provide supplementary overload and short-circuit protection for sensitive electrical, electronic and control circuits.
What is the rated current of the ST203M-Z32?
The ABB ST203M-Z32 has a rated current of 32 A.
What does the Z tripping characteristic mean?
The Z tripping characteristic provides sensitive instantaneous overcurrent protection, making the breaker particularly suitable for electronic, instrumentation and control circuits.
What is the breaking capacity of the ABB ST203M-Z32?
The ST203M-Z32 has a specified short-circuit breaking capacity of 15 kA, providing robust fault protection for its intended circuits.
Is the ABB ST203M-Z32 a UL 1077 supplementary protector?
Yes. The ST203M-Z32 is designed for UL 1077 supplementary protection applications within electrical equipment and control systems.
Trusted by Electrical and Automation Professionals
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial machinery, control panels, electronics and automation systems where reliable overcurrent protection and straightforward DIN-rail integration are required.
