ABB SU203M-K63 Miniature Circuit Breaker
- 63A
- 3 Pole
- DIN Rail
Quantity
ABB SU203M-K63 - 63A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Designed for branch circuit protection, this 63A miniature breaker utilizes a K-curve thermal-magnetic trip to handle high inrush currents from motors and transformers. It installs into standard DIN rail enclosures and control panels, serving as a reliable upgrade or replacement for the legacy S203U-K63. Rated for 10kA at 240VAC, it includes current-limiting capabilities, real contact position indication, and finger-safe screw terminals for enhanced operational safety.Specifications
| Brand | ABB |
|---|---|
| Series | SU203M |
| Amperage | 63A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 240VAC, 96VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 96VDC |
| Terminal Type | Screw/Clamp Terminal |
|---|---|
| For Use With | DIN Rail Enclosures, Control Panels |
| Wire Gauge | 18-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 18 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Curve | K |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Signal Contact, Shunt Trip, Undervoltage Release, Padlock Attachment, Busbar System |
|---|---|
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CE, CSA, IEC, UL, VDE |
| Temp Rating | -25C to 55C |
| Construction Features | Current Limiting, Reverse Feed, Common Trip, RoHS Compliant |
Product FAQs
7 answersWhat does the K trip curve signify on the SU203M-K63?
The K curve characteristic is designed for applications with high inrush currents, such as motors and transformers. It provides thermal magnetic protection that prevents nuisance tripping during brief, high current surges while still offering reliable overload and short circuit protection.
Can the SU203M-K63 be used in 480V systems?
No. While some lower amperage breakers in the SU200M series are rated for 480Y/277VAC, the 63A K curve model is strictly rated for a maximum of 240VAC. Always verify your system voltage before installation.
Does the SU203M-K63 provide UL 489 branch circuit protection?
Yes, the SU200M series is fully certified to UL 489 standards. This means it can be used as a primary branch circuit protection device in North American electrical systems, rather than just as supplementary protection.
Which accessories are compatible with the ABB SU203M-K63?
This breaker is part of the ABB System pro M compact SU200M series and is fully compatible with System pro M compact UL 489 accessories. This includes auxiliary contacts, shunt trips, and busbars specifically designed for this product line.
How is the SU203M-K63 circuit breaker mounted?
It is designed for quick installation on a standard 35mm DIN rail. The breaker features a fast clip mechanism that secures it directly to the rail inside control panels or DIN rail enclosures.
What type of terminals does the SU203M-K63 feature?
This breaker is equipped with failsafe bi-directional cylinder lift terminals. They accept wire gauges ranging from 18 AWG to 4 AWG, ensuring a secure and reliable connection when properly torqued.
Does this breaker have a visual trip indicator?
Yes, the SU200M series features a clear contact position indicator. It displays red or green to provide a real-time visual confirmation of the breaker status, enhancing safety during maintenance and troubleshooting.
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