Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
2CDS272334R0557 ABB ST202M-K40 Miniature Circuit Breaker 40 A 2P K
ABB ST202M-K40 is a 40 A two-pole K-characteristic miniature circuit breaker and UL 1077 supplementary protector from the ST200M series with a 15 kA short-circuit breaking capacity for industrial control and equipment circuit protection.
£66.78
Why Choose the ABB ST202M-K40 Miniature Circuit Breaker?
The ABB ST202M-K40 is a compact and reliable two-pole miniature circuit breaker (MCB) designed for supplementary overcurrent protection in industrial control, automation and electrical equipment applications. As part of the proven ABB ST200M series, it combines a 40 A rated current with a K tripping characteristic for dependable protection of appropriate industrial and inductive loads.
Designed as a UL 1077 supplementary protector, the ST202M-K40 provides thermal-magnetic protection against overload and short-circuit conditions. Its two-pole configuration enables simultaneous protection and switching of two conductors, while its modular DIN-rail construction supports straightforward integration into machinery, control cabinets and industrial electrical assemblies.
With a rated current of 40 A, K characteristic and a specified 15 kA short-circuit breaking capacity, the ST202M-K40 is well suited to industrial circuits requiring robust supplementary protection together with tolerance of normal transient currents. The ABB order code for this device is 2CDS272334R0557.
Key Advantages
- Compact two-pole miniature circuit breaker for supplementary circuit protection.
- 40 A rated current for industrial equipment and control circuits.
- K tripping characteristic suited to appropriate industrial and inductive loads.
- Thermal-magnetic protection against overload and short-circuit conditions.
- UL 1077 supplementary protector design for equipment-level applications.
- 15 kA short-circuit breaking capacity for robust industrial circuit protection.
- DIN-rail mounting simplifies installation in industrial control panels and enclosures.
Key Features
- ABB ST200M miniature circuit breaker series.
- 2-pole configuration.
- 40 A rated current.
- K tripping characteristic.
- 15 kA short-circuit breaking capacity.
- Thermal-magnetic overcurrent protection.
- Designed as a UL 1077 supplementary protector.
- Suitable for appropriate inductive and industrial control loads.
- Compact modular construction for industrial electrical assemblies.
- DIN-rail mounting for straightforward panel installation.
Reliable Supplementary Circuit Protection
Miniature circuit breakers such as the ABB ST202M-K40 automatically interrupt a circuit when excessive current is detected. Thermal protection responds to sustained overload conditions, while the magnetic mechanism provides rapid operation during severe overcurrent and short-circuit events.
The K characteristic is particularly useful for appropriate industrial circuits and inductive loads where normal energisation can produce transient currents. Combined with its 40 A rating, the ST202M-K40 provides targeted supplementary protection for control and equipment circuits while retaining the practical benefits of ABB’s modular ST200M platform.
Typical Applications
- Industrial machinery and automation panels.
- Control and auxiliary circuits.
- Equipment-level supplementary overcurrent protection.
- Industrial inductive loads and control equipment.
- Electrical distribution and control assemblies.
- OEM control cabinets and machine-building applications.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS272334R0557 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 2 | |
| Rated current | 40 A | |
| Tripping characteristic | K | |
| Short-circuit breaking capacity | 15 kA | |
| Standard | UL 1077 | |
| Protection principle | Thermal-magnetic | |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB ST202M-K40 used for?
The ST202M-K40 is a two-pole supplementary miniature circuit breaker designed to protect industrial control, automation and equipment circuits against overload and short-circuit conditions.
What is the rated current of the ST202M-K40?
The ABB ST202M-K40 has a rated current of 40 A.
What does the K characteristic mean?
The K tripping characteristic is suited to appropriate industrial and inductive loads where transient current can occur during normal energisation while dependable overload and short-circuit protection remains necessary.
What is the breaking capacity of the ABB ST202M-K40?
The ST202M-K40 has a specified short-circuit breaking capacity of 15 kA.
Is the ABB ST202M-K40 a UL 1077 supplementary protector?
Yes. The ST202M-K40 is designed as a UL 1077 supplementary protector for equipment-level overcurrent protection applications.
Trusted ABB Circuit Protection
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial control panels, machinery and automation equipment where reliable overload and short-circuit protection is required.
