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2CDS273334R0631 ABB ST203M-D63 Miniature Circuit Breaker 63 A 3P D 15 kA UL1077
ABB ST203M-D63 is a 63 A three-pole D characteristic UL 1077 miniature circuit breaker from the ST200M series, designed for supplementary overcurrent and short-circuit protection of high-inrush industrial electrical equipment.
£132.72
Why Choose the ABB ST203M-D63 Miniature Circuit Breaker?
The ABB ST203M-D63 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable supplementary overcurrent and short-circuit protection in industrial electrical equipment. As part of the ABB ST200M miniature circuit breaker series, it combines compact modular construction with a D tripping characteristic suited to circuits containing loads with high starting or inrush currents.
This breaker has a 63 A rated current and a D tripping characteristic, making it particularly suitable for industrial equipment where transformers, motors, power supplies or other loads can produce substantial transient currents during energisation. Its three-pole configuration enables coordinated protection across three conductors in machinery, automation systems and three-phase electrical equipment.
The ST203M-D63 is designed as a UL 1077 supplementary protector and has a breaking capacity of up to 15 kA under applicable conditions. Its compact DIN-rail-mounted construction enables straightforward integration into industrial control cabinets and equipment assemblies requiring dependable supplementary circuit protection.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial equipment protection.
- 63 A rated current for higher-current three-phase and industrial circuits.
- D tripping characteristic suited to loads with high starting and inrush currents.
- Breaking capacity of up to 15 kA under applicable conditions.
- UL 1077 supplementary protector for equipment-level overcurrent protection.
- Three-pole construction provides coordinated protection across three conductors.
- DIN-rail mounting supports efficient installation in electrical control panels.
Key Features
- ABB ST200M miniature circuit breaker series.
- Three-pole configuration.
- 63 A rated current.
- D characteristic tripping curve.
- Breaking capacity of up to 15 kA under applicable conditions.
- Designed as a UL 1077 supplementary protector.
- Overload and short-circuit protection for downstream circuits and equipment.
- Compact modular construction for DIN-rail-mounted control and distribution equipment.
Reliable Protection for High-Inrush Industrial Circuits
Miniature circuit breakers such as the ABB ST203M-D63 provide automatic protection against overload and short-circuit conditions. By interrupting abnormal current conditions, the breaker helps protect downstream conductors, components and electrical equipment from excessive current and the associated risk of thermal or electrical damage.
The D characteristic is particularly useful for circuits where connected equipment can draw substantial transient current during normal start-up or energisation. Combined with its three-pole configuration and 63 A rating, the ST203M-D63 provides practical supplementary protection for industrial machinery, transformers, motor circuits and other high-inrush electrical loads.
Typical Applications
- Industrial electrical control panels.
- Three-phase machinery and automation equipment.
- Motor circuits with high starting currents.
- Transformer and power-supply circuits.
- Machine-building and OEM electrical systems.
- Supplementary overcurrent protection within industrial equipment.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS273334R0631 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 3 | |
| Rated current | 63 A | |
| Tripping characteristic | D | |
| Breaking capacity | Up to 15 kA under applicable conditions | |
| Standard / approval | UL 1077 supplementary protector | |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB ST203M-D63 used for?
The ST203M-D63 is a three-pole miniature circuit breaker designed to provide supplementary overcurrent and short-circuit protection in industrial machinery, control panels and electrical equipment.
What is the current rating of the ST203M-D63?
The ABB ST203M-D63 has a rated current of 63 A.
What does the D characteristic mean?
The D tripping characteristic is suited to circuits containing loads with high starting or inrush currents, including motors, transformers and other industrial equipment that can draw substantial transient current during energisation.
How many poles does the ABB ST203M-D63 have?
The ST203M-D63 is a three-pole breaker, allowing three conductors to be protected together within industrial electrical equipment.
Is the ABB ST203M-D63 a UL 1077 supplementary protector?
Yes. The ST203M-D63 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.
