Description
ABB S271-K8A Circuit Breaker 1-Pole 8A 240/415VAC K-Curve 6kA DIN Rail MCB
The ABB S271-K8A is a single-pole miniature circuit breaker (MCB) from ABB's S200 series, rated 8A with a K trip curve for use on 240/415VAC systems. K-curve breakers are designed to withstand higher inrush currents before tripping — making them suitable for protecting inductive and motor loads — and trip at 8–15× the rated current for magnetic (instantaneous) response. This unit has a 6kA rated breaking capacity and mounts on standard DIN rail.
Specifications & What's Included
- Manufacturer: ABB
- Model: S271-K8A
- Series: S200
- Number of Poles: 1 (single-pole)
- Current Rating: 8A
- Trip Curve: K (instantaneous trip at 8–15× In; for inductive/motor loads)
- Voltage Rating: ~240/415VAC (per unit label)
- Breaking Capacity: 6kA
- Mounting: Standard DIN rail
- Toggle handle: black, up/on position
- Auxiliary contact port visible on side
- Circuit breaker only — no DIN rail, accessories, or mounting hardware included
Note on Voltage Rating: The unit label in the photos reads ~240/415VAC. The original listing stated 277/480VAC. These are different voltage standards (IEC/European vs. North American). Please verify the voltage specification matches your application before purchasing.
Applications
ABB S200 series miniature circuit breakers are widely used in industrial control panels, distribution boards, and machine protection circuits. The K-curve characteristic suits loads with high inrush currents at startup, such as small motors, transformers, solenoids, and similar inductive equipment, where a standard B- or C-curve breaker might nuisance-trip during startup transients. Single-pole MCBs like this are commonly installed in European-standard 240/415VAC three-phase distribution systems — one breaker per phase — to provide overcurrent and short-circuit protection on individual branch circuits. ABB's S200 series has been a standard product line in IEC-market panel building for decades and remains in current production use worldwide.
This ABB S271-K8A miniature circuit breaker has been inspected and appears to be in good used condition. The photos show slight yellowing on the left side of the housing body, which is cosmetic only. The toggle handle operates freely and the unit shows no cracks, chips, or damage to the casing or terminals. It was pulled from a working environment where it was previously in service. Please note: the unit label reads ~240/415VAC, which differs from the 277/480VAC listed in the original product data — buyers should verify voltage compatibility with their application before purchasing. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
ABB |
Model: |
S271-K8A |
MPN: |
S271-K8A |
Type: |
Miniature Circuit Breaker (MCB) |
SKU: |
47721 |
Number of Poles: |
1 |
Current Rating: |
8A |
Voltage Rating: |
240/415VAC |
Trip Curve: |
K |
Breaking Capacity: |
6kA |
Mounting Type: |
DIN Rail |
Series: |
S200 |
Frequency: |
50/60Hz |
Form Factor: |
DIN Rail Module |
Country/Region of Manufacture: |
Germany |
Seller Notes: |
Circuit breaker only — no DIN rail, accessories, or mounting hardware included. |
Condition Notes: |
This ABB S271-K8A 1-pole circuit breaker is in good used condition with slight cosmetic yellowing on the housing. Toggle operates freely. No cracks or damage. Note: label reads ~240/415VAC. Pulled from working service. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |