ABB S203U-K15 Miniature Circuit Breaker
- 15A
- 3 Pole
- DIN Rail
Quantity
ABB S203U-K15 - 15A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Delivering UL 489 branch circuit protection, this three-phase thermal-magnetic device excels in demanding industrial environments. It mounts effortlessly onto 35mm DIN rails within motor control centers and automation panels. The K-curve trip profile allows equipment like motors and transformers to start without nuisance tripping, backed by a 10kA interrupting rating at 240V. For new installations, note that this model has been transitioned to the SU203M-K15 replacement line.Specifications
| Brand | ABB |
|---|---|
| Series | S200U |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | S203 |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Panels, 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, Bell Alarm, Shunt Trip, Busbar System, Rotary Handle, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | -25C to 55C |
| Construction Features | Current Limiting, Reverse Feed, Trip-Free Mechanism, Common Trip |
Product FAQs
8 answersWhat does the 'U' in the S200U series designate?
The 'U' indicates that this breaker is UL 489 listed for branch circuit protection, unlike the standard S200 series which is UL 1077 recognized for supplementary protection only.
What applications are best suited for the K trip curve on this breaker?
The K curve is designed for highly inductive loads, motors, and transformers. It allows for high inrush currents without nuisance tripping, featuring a magnetic trip threshold of 10 to 14 times the rated current.
Can the S203U-K15 be reverse fed?
Yes, ABB S200U series miniature circuit breakers are suitable for reverse feeding. The line and load connections can be wired to either the top or bottom terminals.
What type of mounting rail is required for this breaker?
This breaker mounts directly onto a standard 35mm DIN rail.
How can I visually verify if the breaker contacts are open or closed?
The breaker features a Contact Position Indication (CPI) window on the toggle. It displays green when the contacts are open (OFF) and red when they are closed (ON), providing a reliable visual safety check independent of the toggle position.
Are the terminals on this breaker finger-safe?
Yes, the S200U series features IP20-rated finger-safe box lug terminals to protect against accidental contact with live parts during installation and maintenance.
Is this breaker considered current limiting?
Yes, the ABB S200U series miniature circuit breakers are current limiting. This helps reduce let-through energy during a short circuit to protect downstream equipment.
Can I use a busbar system with this circuit breaker?
Yes, the S200U series features twin terminals that allow for the separate connection of cables and dedicated ABB UL-rated busbars.
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