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2CDS273337R0407 ABB SU203M-K8 Miniature Circuit Breaker 3P K 8A 10kA UL489
ABB SU203M-K8 is an 8 A three-pole Type K miniature circuit breaker with a 10 kA UL 489 interrupting rating for reliable branch-circuit protection of industrial and inductive loads.
£167.64
Why Choose the ABB SU203M-K8 Miniature Circuit Breaker?
The ABB SU203M-K8 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable branch-circuit overcurrent and short-circuit protection in industrial and commercial electrical installations. As part of the ABB System pro M compact SU200M series, it combines compact modular construction with UL 489 compliance for demanding electrical distribution and machine control applications.
Featuring a K tripping characteristic, the SU203M-K8 is particularly suited to circuits supplying inductive loads with higher starting currents, including motors, transformers and industrial control equipment. Its three protected poles provide simultaneous protection and isolation of three-phase circuits, while its DIN rail format enables straightforward integration into control panels and distribution assemblies.
With a rated current of 8 A and a 10 kA UL 489 interrupting rating, the SU203M-K8 provides dependable protection for industrial branch circuits. Its thermal-magnetic operating principle and Type K response make it a practical choice for machinery, automation equipment and electrical systems where normal load inrush must be accommodated while maintaining effective fault protection.
Key Advantages
- Reliable UL 489 branch-circuit protection for industrial and commercial installations.
- 8 A rated current for three-phase electrical circuits.
- Three-pole configuration for simultaneous protection and isolation.
- K tripping characteristic suited to inductive loads with elevated starting currents.
- 10 kA UL 489 interrupting rating for dependable short-circuit protection.
- Compact DIN rail design simplifies integration into control panels and distribution systems.
Key Features
- ABB System pro M compact SU200M series.
- 8 A rated current.
- 3 poles / 3 protected poles.
- Type K tripping characteristic.
- 10 kA UL 489 interrupting rating.
- Thermal-magnetic protection against overloads and short circuits.
- Designed for branch-circuit protection under UL 489.
- Suitable for motor, transformer and other inductive-load circuits.
- DIN rail mounting for modular electrical distribution systems.
Reliable Protection for Inductive Loads
Miniature circuit breakers such as the ABB SU203M-K8 automatically interrupt a circuit when excessive current occurs because of an overload or short circuit. Thermal-magnetic operation provides dependable protection for conductors and connected equipment while allowing the breaker to be reset after the cause of a trip has been corrected.
The K characteristic is designed for applications where normal starting currents can be higher than those encountered with predominantly resistive loads. This makes the SU203M-K8 particularly useful in industrial control, motor and transformer circuits where tolerance of normal inrush current is required alongside effective overcurrent protection.
Typical Applications
- Industrial electrical control panels.
- Three-phase branch-circuit protection.
- Motor and inductive-load circuits.
- Transformer and control circuits.
- Machinery and factory automation systems.
- OEM equipment and machine building.
Technical Specifications
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| Certification | UL 489 | |
|---|---|---|
| Series | System pro M compact SU200M | |
| ABB order code | 2CDS273337R0407 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 8 A | |
| Number of poles | 3 | |
| Number of protected poles | 3 | |
| Tripping characteristic | K | |
| UL 489 interrupting rating | 10 kA | |
| Rated operational voltage (IEC) | 400 V AC | |
| Rated insulation voltage (Ui) | 440 V | |
| Rated impulse withstand voltage (Uimp) | 4 kV | |
| Rated ultimate short-circuit breaking capacity (Icu) at 400 V AC | 15 kA | |
| Rated service short-circuit breaking capacity (Ics) at 400 V AC | 11.2 kA | |
| Frequency | 50 / 60 Hz | |
| Mounting | 35 mm DIN rail | |
| Dimensions (W × H × D) | 52.5 × 111 × 69 mm | |
| Standards | UL 489, CSA 22.2 No. 5, IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB SU203M-K8 used for?
The SU203M-K8 is a three-pole miniature circuit breaker used to protect branch circuits against overload and short-circuit currents, particularly in industrial applications involving motors, transformers and other inductive loads.
What is the rated current of the SU203M-K8?
The ABB SU203M-K8 has a rated current of 8 A.
What does the K tripping characteristic mean?
The Type K characteristic is intended for circuits with higher normal starting currents, making it well suited to motors, transformers and other inductive loads.
Is the ABB SU203M-K8 UL 489 compliant?
Yes. The SU203M-K8 is a UL 489 miniature circuit breaker designed for branch-circuit protection applications.
What is the interrupting rating of the SU203M-K8?
The SU203M-K8 has a 10 kA UL 489 interrupting rating, providing dependable short-circuit protection for appropriately rated electrical systems.
Trusted ABB Circuit Protection
ABB System pro M compact SU200M miniature circuit breakers provide dependable modular circuit protection for industrial machinery, control panels and electrical distribution systems requiring reliable overload and short-circuit protection.
