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2CDS273334R0378 ABB ST203M-Z6 Miniature Circuit Breaker 6 A 3P Z 15 kA
ABB ST203M-Z6 is a 6 A three-pole Z characteristic UL 1077 miniature circuit breaker from the ST200M series, designed for supplementary overcurrent and short-circuit protection of sensitive industrial electrical equipment.
£100.86
Why Choose the ABB ST203M-Z6 Miniature Circuit Breaker?
The ABB ST203M-Z6 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable supplementary overcurrent and short-circuit protection in industrial electrical control and distribution equipment. As part of the ABB ST200M miniature circuit breaker series, it combines compact DIN-rail construction with a sensitive Z tripping characteristic for circuits requiring rapid response to overcurrent conditions.
This breaker has a 6 A rated current and a Z tripping characteristic, making it particularly suitable for sensitive electrical and electronic loads where relatively low fault currents need to produce rapid magnetic tripping. Its three-pole configuration allows coordinated protection of three conductors in industrial machinery, automation equipment and control systems.
The ST203M-Z6 is rated as a UL 1077 supplementary protector and provides a breaking capacity of up to 15 kA under applicable IEC conditions. Its modular design supports straightforward installation on DIN rail within control cabinets and equipment assemblies where dependable, space-efficient supplementary circuit protection is required.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial equipment protection.
- 6 A rated current for low-current three-phase and control circuits.
- Z tripping characteristic provides sensitive response to overcurrent conditions.
- Breaking capacity of up to 15 kA under applicable IEC conditions.
- UL 1077 supplementary protector for equipment-level overcurrent protection.
- DIN-rail mounting supports efficient integration into electrical control panels.
Key Features
- ABB ST200M miniature circuit breaker series.
- Three-pole configuration.
- 6 A rated current.
- Z characteristic tripping curve.
- 15 kA maximum breaking capacity under applicable IEC conditions.
- Designed as a UL 1077 supplementary protector.
- Thermal-magnetic overcurrent protection principle.
- Compact modular construction for DIN-rail-mounted control and distribution equipment.
Reliable Protection for Sensitive Industrial Circuits
Miniature circuit breakers such as the ABB ST203M-Z6 provide automatic protection against overload and short-circuit conditions. Thermal-magnetic operation combines a thermal response to sustained overloads with magnetic operation during short-circuit and higher overcurrent conditions, helping protect downstream conductors and electrical equipment.
The Z characteristic provides a comparatively sensitive magnetic response and is therefore suited to circuits containing sensitive electrical or electronic equipment with relatively low permissible overcurrents. Combined with its three-pole configuration, the ST203M-Z6 provides practical supplementary protection for industrial control, automation and equipment circuits.
Typical Applications
- Industrial electrical control panels.
- Sensitive electronic and automation equipment.
- Three-phase control and auxiliary circuits.
- PLC and industrial control systems.
- Machine-building and OEM electrical equipment.
- Supplementary overcurrent protection within industrial equipment.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS273334R0378 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 3 | |
| Rated current | 6 A | |
| Tripping characteristic | Z | |
| Breaking capacity | Up to 15 kA under applicable IEC conditions | |
| Standard / approval | UL 1077 supplementary protector | |
| Protection principle | Thermal-magnetic | |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB ST203M-Z6 used for?
The ST203M-Z6 is a three-pole miniature circuit breaker designed to provide supplementary overcurrent and short-circuit protection for sensitive industrial control, automation and electrical equipment circuits.
What is the current rating of the ST203M-Z6?
The ABB ST203M-Z6 has a rated current of 6 A.
What does the Z characteristic mean?
The Z tripping characteristic provides a sensitive magnetic response to overcurrent, making it suitable for circuits containing sensitive electrical and electronic equipment where relatively low fault currents require rapid interruption.
How many poles does the ABB ST203M-Z6 have?
The ST203M-Z6 is a three-pole breaker, allowing three conductors to be protected together within industrial electrical equipment.
Is the ABB ST203M-Z6 a UL 1077 supplementary protector?
Yes. The ST203M-Z6 is designed as a UL 1077 supplementary protector for equipment-level overcurrent protection.
Trusted Industrial Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial control panels, machinery and automation equipment where reliable overcurrent protection and straightforward DIN-rail installation are required.
