ABB S201U-K4 Miniature Circuit Breaker
- 4A
- 1 Pole
- DIN Rail
Quantity
ABB S201U-K4 - 4A 1 Pole Miniature Circuit Breaker
New
Quantity
Description
Engineered for industrial motor control, this 4A miniature circuit breaker provides dependable thermal-magnetic protection. It is specifically tailored to safeguard circuits experiencing high inrush currents. The breaker installs into standard DIN rail enclosures and control panels. As a trusted legacy component, it can be replaced by the SU201M-K4 model when upgrading systems. With a 10kAIC rating at 240VAC, it includes a trip-free mechanism and supports reverse feed wiring.Specifications
| Brand | ABB |
|---|---|
| Series | S200U |
| Amperage | 4A |
| Poles | 1 |
| Mounting Style | DIN Rail |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | S201 |
|---|---|
| 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 |
Product FAQs
6 answersWhat applications are best suited for the K-curve trip characteristic on the S201U-K4?
The K-curve is engineered for loads with high inrush currents. It trips at 10 to 14 times the rated current, allowing it to ride through the initial surge of motor control circuits, transformers, and inductive loads without nuisance tripping.
Does the S201U-K4 meet UL 489 requirements?
Yes, breakers in the ABB S200U series are UL 489 listed. This certification means they are approved for use as primary branch circuit protection in service entrances, feeders, and branch circuits, rather than just supplementary protection.
How is the S201U-K4 secured inside an electrical panel?
This miniature circuit breaker is designed for modular installation and snaps directly onto standard 35mm DIN rail, which is the industry standard for industrial control panels and automation enclosures.
What are the terminal specifications for wiring this breaker?
The breaker is equipped with IP20 finger-safe box lug terminals that accommodate 18 AWG to 4 AWG conductors. These terminals utilize a pressure plate design for secure connections in industrial control panels.
How does the thermal-magnetic trip mechanism operate during a fault?
The breaker uses a dual-mechanism system. A delayed thermal element protects the wiring from sustained overloads, while an instantaneous magnetic element trips the breaker immediately when it detects a severe short circuit.
Is this breaker rated for direct current control systems?
Yes, while commonly used in 120/240VAC applications, this single-pole breaker is also certified for DC control circuits with a maximum rating of 60VDC.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.