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2CDS271334R0578 ABB ST201M-Z50 Miniature Circuit Breaker 50 A 1P Z UL1077
ABB ST201M-Z50 is a 50 A single-pole Z-characteristic ST200M miniature circuit breaker designed for sensitive UL 1077 supplementary overcurrent protection, with a 15 kA ultimate short-circuit breaking capacity at 230 V AC.
£36.25
Why Choose the ABB ST201M-Z50 Miniature Circuit Breaker?
The ABB ST201M-Z50 is a compact and reliable single-pole miniature circuit breaker (MCB) designed for supplementary overcurrent protection in industrial control equipment and electrical systems. As part of the ABB ST200M series, it combines a 50 A rated current with a sensitive Z tripping characteristic and UL 1077 supplementary protector compliance.
The ST201M-Z50 provides thermal-magnetic protection against overload and short-circuit conditions. Its Z characteristic provides sensitive magnetic tripping at relatively low multiples of rated current, making it suitable for electrical and electronic equipment where rapid response to fault currents is required.
With a 50 A rated current, single protected pole and an IEC/EN 60947-2 ultimate short-circuit breaking capacity of 15 kA at 230 V AC, the ST201M-Z50 provides robust protection in a compact modular format. Its DIN-rail construction makes it straightforward to integrate into industrial control panels, machinery and OEM electrical assemblies.
Key Advantages
- Compact single-pole supplementary circuit protection for industrial equipment.
- 50 A rated current for higher-current equipment and control circuits.
- Z tripping characteristic for sensitive magnetic response to overcurrent conditions.
- 15 kA ultimate short-circuit breaking capacity at 230 V AC according to IEC/EN 60947-2.
- Designed as a UL 1077 supplementary protector.
- Compact modular DIN-rail construction for space-efficient panel installation.
Key Features
- ABB ST200M miniature circuit breaker series.
- 50 A rated current.
- 1-pole configuration.
- Z tripping characteristic.
- 15 kA ultimate short-circuit breaking capacity at 230 V AC.
- Thermal-magnetic overload and short-circuit protection.
- UL 1077 supplementary protector classification.
- Compatible with AC and DC supplementary protection applications at specified rated voltages.
- Compact modular construction for electrical control panels.
- DIN-rail mounting for straightforward installation.
Reliable Protection for Sensitive Electrical Circuits
Miniature circuit breakers such as the ABB ST201M-Z50 automatically disconnect electrical circuits when overload or short-circuit conditions exceed their designed operating limits. Thermal protection responds to sustained overloads, while the magnetic mechanism provides rapid interruption during short-circuit and severe overcurrent conditions.
The Z tripping characteristic makes the ST201M-Z50 particularly useful for circuits where sensitive magnetic fault protection is required. Combined with the ST200M series' compact modular construction, international standards and DIN-rail mounting, it provides dependable supplementary protection for industrial control systems, electrical equipment and OEM machinery.
Typical Applications
- Industrial electrical and electronic equipment.
- Electrical control panels and automation cabinets.
- Supplementary protection of sensitive electrical loads.
- Industrial control and automation systems.
- OEM machinery and electrical assemblies.
- Circuits requiring sensitive overcurrent protection.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS271334R0578 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Rated current | 50 A | |
| Number of poles | 1 | |
| Number of protected poles | 1 | |
| Tripping characteristic | Z | |
| UL 1077 rated voltages | 240 V AC, 277 V AC and 60 V DC | |
| UL 1077 interrupting rating | 10 kA | |
| Ultimate short-circuit breaking capacity | 15 kA at 230 V AC according to IEC/EN 60947-2 | |
| Protection principle | Thermal-magnetic | |
| Standards | UL 1077, CSA 22.2 No. 235, IEC/EN 60947-2 | |
| Mounting type | DIN rail | |
| Configuration | Modular | |
| Weight | approx. 0.115 kg |
Frequently Asked Questions
What is the ABB ST201M-Z50 used for?
The ST201M-Z50 is a 50 A single-pole miniature circuit breaker designed to provide supplementary overload and short-circuit protection in industrial electrical and control equipment.
What is the current rating of the ST201M-Z50?
The ABB ST201M-Z50 has a rated current of 50 A.
What does the Z characteristic mean?
The Z tripping characteristic provides sensitive magnetic tripping at relatively low multiples of rated current, making it suitable for equipment and circuits requiring rapid response to overcurrent conditions.
What is the breaking capacity of the ABB ST201M-Z50?
The ST201M-Z50 has an ultimate short-circuit breaking capacity of 15 kA at 230 V AC according to IEC/EN 60947-2 and a 10 kA UL 1077 interrupting rating at its specified UL rated voltages.
Does the ABB ST201M-Z50 comply with UL 1077?
Yes. The ST201M-Z50 is designed as a UL 1077 supplementary protector and is also specified to CSA 22.2 No. 235 and IEC/EN 60947-2.
Trusted ABB Circuit Protection
ABB ST200M miniature circuit breakers provide compact and dependable supplementary protection for industrial control panels, machinery and electrical equipment, combining thermal-magnetic protection with convenient modular DIN-rail installation.
