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 surplus PLCs, HMIs, VFDs, servo drives, sensors, electronic components, 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 and electronics 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 industrial surplus 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 and all electronic supplies we sell. We know time is money, and we aim to provide peace of mind when it comes to mission-critical replacement parts.

SIGMA Surplus also buys your spare automation components, 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.

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We add stock to our inventory daily