SIGMA Surplus is here to help.
SIGMA Surplus provides reliable, hand-inspected parts
SIGMA Surplus buys spare parts
SIGMA Surplus sells the brands you trust
SIGMA Surplus keeps your production running

SIGMA‌ ‌Surplus‌

‌Automation,‌ ‌Electrical,‌ ‌and‌ ‌Industrial‌ ‌Parts‌

SIGMA Surplus, a division of SIGMA Group, makes it easy to buy and sell MRO spare parts. We serve all manufacturing industries with our wide selection of PLCs, HMIs, VFDs, servo drives, sensors, and much more! We carry the brands you know and trust, from Allen-Bradley to Siemens, Square D, ABB, and hundreds more.

When your production line goes down, SIGMA Surplus helps you get you back up and running quickly. We deliver reliable parts fast, offering same-day shipping on orders placed before 2 p.m. CST as well as overnight and international options plus a door-to-door courier service.

We source our parts from reliable, trusted suppliers across the United States and beyond - many of them from customers like yourself. We strive to foster a sustainable ecosystem of surplus automation materials driven by our valued clients.

We are committed to building relationships through convenient transactions and a guarantee in our work. In addition to our standard 30-day warranty on every item in our inventory, we include a free two-year warranty with each powered-up product we sell. We know time is money, and we aim to provide peace of mind when it comes to mission-critical parts.

SIGMA Surplus also buys spare automation parts, whether they’re new, open-box, or used. Earn value on parts you aren’t using and clear up facility space at the same time. We offer competitive rates on MRO surplus across a variety of programs tailored to your specific needs. Discover our buying options today and find the perfect fit for your organization.

Visit our about page to learn more about SIGMA Surplus and start buying or selling your parts.

  • 2 Year Warranty
    on inspected and tested parts
  • Same Day Shipping
    available on orders before 2 PM CST
  • 7500+ Positive Reviews
    99.8% positive feedback from our buyers
  • Quality Customer Service
    Our team takes care of you

Most Popular Brands

We add stock to our inventory daily