ABB SU203M-K30 Miniature Circuit Breaker
- 30A
- 3 Pole
- DIN Rail
Quantity
ABB SU203M-K30 - 30A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Operating as a crucial safety component, this 30-amp three-phase miniature breaker defends against overloads. It is tailored for heavy-duty commercial and industrial applications. Designed to mount into standard DIN rail enclosures, it offers a seamless upgrade path. Facility managers can use it to replace discontinued S203U-K30 units easily. With a 10kA interrupting capacity at 480Y/277VAC, it delivers exceptional current-limiting performance.Specifications
| Brand | ABB |
|---|---|
| Series | SU203M |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 480Y/277VAC, 96VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 480Y/277VAC, 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 applications are best suited for the K-curve trip characteristic on the SU203M-K30?
The K-curve trip profile is specifically designed to handle high inrush currents without nuisance tripping. This makes it ideal for protecting motors, transformers, and auxiliary control circuits.
Does the SU203M-K30 meet UL 489 requirements?
Yes, this breaker is UL 489 listed for branch circuit protection. This allows it to be used for primary circuit protection in North American control panels, unlike standard supplementary protectors.
Which accessory line is compatible with the SU203M-K30 breaker?
This unit is part of the ABB System pro M compact family. It is fully compatible with System pro M compact UL 489 accessories, including auxiliary contacts, bell alarms, and shunt trips.
How is the SU203M-K30 secured inside an enclosure?
It mounts directly onto a standard 35mm DIN rail. The breaker features a fast-clip mechanism that allows for quick installation and easy removal from the rail.
What type of connections does the SU203M-K30 use for field wiring?
It utilizes screw clamp terminals that accommodate a wide range of wire sizes, accepting conductors from 18 AWG up to 4 AWG for flexible panel wiring.
Is the SU203M-K30 suitable for direct current applications?
Yes, this breaker is dual-rated for both alternating current and direct current. It provides a 10kA interrupting capacity for DC systems up to 96VDC, making it versatile for various industrial applications.
What is the IP rating of the terminals on the SU203M-K30?
The terminals feature an IP20 finger-safe design. This helps prevent accidental contact with live electrical connections during panel maintenance and troubleshooting.
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