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2CDS273334R0204 ABB ST203M-C20 Miniature Circuit Breaker 20 A 3P C 15 kA UL1077
ABB ST203M-C20 is a 20 A 3-pole C-characteristic miniature circuit breaker with a 15 kA short-circuit rating for UL 1077 supplementary overcurrent protection.
£79.40
Why Choose the ABB ST203M-C20 Miniature Circuit Breaker?
The ABB ST203M-C20 is a compact 3-pole miniature circuit breaker (MCB) designed for supplementary overcurrent and short-circuit protection in industrial machinery, control panels and electrical equipment. As part of the ABB ST200M series, it combines a 20 A rated current with C-characteristic tripping and compliance with the UL 1077 standard.
The ST203M-C20 uses thermal-magnetic protection to respond to sustained overloads and short-circuit faults. Its C tripping characteristic provides a practical balance between fault sensitivity and tolerance of moderate starting currents, making it suitable for a broad range of industrial control, automation and equipment circuits.
With a 3-pole configuration, 20 A rated current and 15 kA short-circuit rating, the ST203M-C20 provides dependable supplementary protection for three-pole industrial circuits. ABB order code 2CDS273334R0204 identifies this specific ST200M configuration.
Key Advantages
- Reliable 3-pole supplementary circuit protection for industrial equipment.
- 20 A rated current suited to control, automation and equipment circuits.
- C tripping characteristic accommodates moderate starting and inrush currents.
- 15 kA short-circuit rating for robust fault protection.
- UL 1077 compliant for supplementary overcurrent protection.
- Compact modular construction for integration into industrial control panels.
Key Features
- ABB ST200M miniature circuit breaker series.
- 3-pole configuration.
- 20 A rated current.
- C-characteristic thermal-magnetic tripping.
- 15 kA short-circuit rating.
- Designed for supplementary overcurrent and short-circuit protection.
- Suitable for industrial control and equipment circuits with moderate inrush currents.
- Compact modular design for electrical control and automation assemblies.
Reliable Supplementary Protection for Industrial Equipment
Miniature circuit breakers such as the ABB ST203M-C20 protect conductors and connected equipment by automatically interrupting current during overload or short-circuit conditions. Thermal protection responds to sustained overloads, while the magnetic trip mechanism provides rapid operation when significant fault currents occur.
The C tripping characteristic accommodates moderate short-duration inrush currents while maintaining dependable fault protection. Combined with its UL 1077 supplementary protection classification, the ST203M-C20 is well suited to industrial control, automation and machinery circuits requiring compact and resettable overcurrent protection.
Typical Applications
- Industrial machinery and machine control panels.
- Industrial control and automation circuits.
- Production and processing equipment.
- Circuits with moderate starting or inrush currents.
- Electrical equipment requiring supplementary protection.
- OEM control assemblies using UL 1077 supplementary protectors.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS273334R0204 | |
| Product type | Miniature circuit breaker (MCB) | |
| Number of poles | 3 | |
| Rated current | 20 A | |
| Tripping characteristic | C | |
| Trip technology | Thermal-magnetic | |
| Short-circuit rating | 15 kA | |
| Standard | UL 1077 | |
| Application | Supplementary overcurrent protection |
Frequently Asked Questions
What is the ABB ST203M-C20 used for?
The ST203M-C20 is a 3-pole miniature circuit breaker designed to provide supplementary overload and short-circuit protection for industrial control, automation, machinery and electrical equipment circuits.
What is the rated current of the ST203M-C20?
The ABB ST203M-C20 has a rated current of 20 A.
What does the C characteristic mean?
The C tripping characteristic is suited to circuits that can experience moderate starting or inrush currents, making it a versatile choice for industrial control and equipment applications.
What is the short-circuit rating of the ST203M-C20?
The ST203M-C20 has a 15 kA short-circuit rating.
What is the ABB order code for the ST203M-C20?
The ABB order code for the ST203M-C20 is 2CDS273334R0204.
Trusted Industrial Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide dependable supplementary overcurrent and short-circuit protection for industrial control panels, machinery and electrical equipment, combining compact construction with proven thermal-magnetic protection technology.
