Is this breaker suitable for motor loads?
Yes, the K‑curve is designed for high inrush currents typical of motors and transformers.
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
ABB
S273-K20
Miniature Circuit Breaker, 3‑Pole, 20 A, K Curve
ABB
From $128.14In stock
Product Description
This miniature circuit breaker is a 3‑pole, 20 A K‑curve device intended for industrial and commercial distribution panels where high inrush currents are common. The K trip characteristic supports motor, transformer, and inductive loads by tolerating elevated start currents while still providing fast interruption under short‑circuit conditions. It is suitable for applications up to 277 VAC single‑phase and 480 VAC three‑phase, with typical integration on DIN rails for compact installations. The breaker’s construction targets reliable overcurrent protection and panel safety, with finger‑safe considerations and an IP20 style housing often used in control cabinets. Use in motor control centers, HVAC systems, machinery, and lighting circuits with surge demands. Includes the three‑pole breaker only; auxiliary accessories are not indicated. The model identifier is S273‑K20 and aligns with ABB/Asea Brown Boveri SACE series conventions for miniature breakers with defined interrupt ratings and standardized dimensions suitable for IEC‑style enclosures.
Key Features
- •3 pole miniature circuit breaker, 20 amp K curve trip characteristic, Supports high inrush inductive loads, Rated for 277 VAC single phase, Rated for 480 VAC three phase, DIN rail mountable form factor, Finger safe IP20 style housing
Specifications
- Model
- S273-K20
- Poles
- 3
- Current Rating
- 20 A
- Trip Curve
- K curve
- Voltage Rating
- 277 VAC single-phase; 480 VAC three-phase
- Interrupting Capacity
- 10 kA at 480 VAC
- Mounting
- DIN rail
- Protection Rating
- IP20
- Weight
- Approx. 1 lb
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
Independent sourcing disclaimer
We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
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FAQ
What voltages can it be used on?
277 VAC single‑phase and 480 VAC three‑phase applications.
What is the interrupting rating?
10 kA at 480 VAC per provided specifications.
How does it mount in a panel?
It mounts on standard DIN rail for quick installation.
What is the protection rating?
IP20, providing finger‑safe protection in control cabinets.