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2CDS272334R0487 ABB ST202M-K20 Miniature Circuit Breaker 2P K 20 A UL1077
ABB ST202M-K20 is a 20 A two-pole K-characteristic miniature circuit breaker and UL 1077 supplementary protector designed for industrial equipment and electrical sub-circuit protection.
£59.06
Why Choose the ABB ST202M-K20 Miniature Circuit Breaker?
The ABB ST202M-K20 is a high-performance 2-pole miniature circuit breaker (MCB) designed to provide supplementary overcurrent and short-circuit protection for industrial control equipment and electrical sub-circuits. As part of the ABB ST200M series, it combines compact DIN-rail installation with K-characteristic thermal-magnetic tripping and compliance with UL 1077 requirements.
With a rated current of 20 A, the ST202M-K20 is particularly suited to circuits containing inductive loads and equipment that can produce elevated starting currents. Its K tripping characteristic provides tolerance of normal short-duration inrush currents while maintaining dependable protection against sustained overloads and short circuits.
The ST202M-K20 provides an ultimate short-circuit breaking capacity of 15 kA at 400 V AC according to IEC 60947-2. Its two-pole configuration enables simultaneous switching and protection of two conductors, making it a practical choice for industrial machinery, automation equipment and electrical control panels requiring reliable supplementary circuit protection.
Key Advantages
- Compact 2-pole miniature circuit breaker for supplementary overcurrent protection.
- 20 A rated current for industrial equipment and control circuits.
- K tripping characteristic suited to inductive loads and circuits with starting currents.
- 15 kA ultimate short-circuit breaking capacity at 400 V AC according to IEC 60947-2.
- Designed for UL 1077 supplementary protection applications.
- DIN-rail modular construction supports efficient installation in electrical control panels.
Key Features
- ABB ST200M miniature circuit breaker series.
- 2-pole configuration.
- 20 A rated current.
- K characteristic thermal-magnetic tripping.
- 400 V AC rated operational voltage according to IEC 60947-2.
- 440 V rated insulation voltage.
- 4 kV rated impulse withstand voltage.
- 15 kA ultimate breaking capacity at 400 V AC.
- Compact modular construction for DIN-rail mounting.
- Suitable for supplementary protection of industrial equipment and electrical sub-circuits.
Reliable Supplementary Protection for Industrial Circuits
Miniature circuit breakers such as the ABB ST202M-K20 automatically disconnect a circuit when excessive current caused by an overload or short circuit is detected. This helps protect downstream equipment and conductors while allowing straightforward manual resetting after the cause of the electrical fault has been identified and corrected.
The ST200M range is designed for supplementary protection in industrial electrical systems. The K characteristic makes the ST202M-K20 particularly useful for inductive equipment and other loads with elevated starting currents, while its compact modular construction allows efficient integration into DIN-rail control cabinets and automation assemblies.
Typical Applications
- Industrial machinery and automation control panels.
- Motor and inductive load circuits.
- Control transformers and industrial power supplies.
- Manufacturing and production equipment.
- Electrical sub-circuits requiring supplementary overcurrent protection.
- OEM machinery and control cabinet installations.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS272334R0487 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 2P | |
| Number of protected poles | 2 | |
| Rated current | 20 A | |
| Tripping characteristic | K | |
| Rated operational voltage | 400 V AC according to IEC 60947-2 | |
| Rated insulation voltage (Ui) | 440 V | |
| Rated impulse withstand voltage (Uimp) | 4 kV | |
| Rated frequency | 50 / 60 Hz | |
| Ultimate short-circuit breaking capacity (Icu) | 15 kA at 400 V AC | |
| Service short-circuit breaking capacity (Ics) | 11.2 kA at 400 V AC | |
| Standard | UL 1077 | |
| Mounting type | DIN rail | |
| Modular width | 2 modules |
Frequently Asked Questions
What is the ABB ST202M-K20 used for?
The ST202M-K20 is a 2-pole supplementary miniature circuit breaker used to protect industrial equipment and electrical sub-circuits against overload and short-circuit currents.
What is the rated current of the ABB ST202M-K20?
The ST202M-K20 has a rated current of 20 A.
What does the K characteristic mean?
The K tripping characteristic is suited to circuits containing inductive equipment and loads with elevated starting currents, helping reduce unwanted tripping during normal equipment start-up.
What is the breaking capacity of the ST202M-K20?
The ST202M-K20 has an ultimate short-circuit breaking capacity of 15 kA at 400 V AC according to IEC 60947-2.
Is the ABB ST202M-K20 a UL 1077 supplementary protector?
Yes. The ST202M-K20 is designed to meet UL 1077 requirements for supplementary overcurrent protection in applications where the required branch-circuit protection is provided separately.
Trusted Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide dependable supplementary protection for industrial control systems, machinery and electrical equipment, combining compact DIN-rail installation with established ABB circuit-protection technology.
