Counterfeit parts follow shortages. When authorized stock runs dry and a build date is getting close, buyers start answering broker calls they’d normally ignore, and that’s exactly the moment counterfeiters are waiting for. If you want to avoid counterfeit electronics during the current shortage, the time to set your rules is before you need a part badly, not after.
At Thomas Instrumentation, sourcing quality parts in a tight market is part of what we do for customers every day. This post explains how counterfeit components enter a supply chain during allocation, what authentication testing actually catches and what it misses, and how to buy on the open market without gambling a build.
Why Counterfeit Risk Rises During a Shortage
The economics are simple. Long lead times and high prices create buyers who are willing to pay a premium for immediate stock, and that premium makes fraud worth the effort. The current shortage, driven largely by AI data center demand and covered in our overview of 2026 component price increases, has created that pressure across memory, capacitors and other common parts.
Reporting trends bear this out over time. ERAI, which maintains one of the largest databases of suspect counterfeit and nonconforming parts, logged 1,055 such parts in 2024, a 25% increase over 2023 and its highest total since 2015. Reported numbers move from year to year and fell in 2025, but reports lag the market. The conditions that produce counterfeits are here now.
How Counterfeit Parts Enter a Supply Chain
Very few counterfeits are built from scratch. Most start as something real.
Recycled and Remarked Parts
Components are pulled from scrapped boards, cleaned, sometimes re-tinned, then resurfaced and remarked to look new. The part inside may have worked once, but it has already been through at least one soldering cycle, possibly years of field use, and uncontrolled handling since.
Upgraded Markings
A real part is remarked to look like a more valuable one: a newer date code, a higher speed grade, or an industrial or military temperature rating it was never tested to meet. These parts often pass a quick functional check at room temperature and fail later in the field.
Rejects, Overruns and Clones
Parts that failed a manufacturer’s own testing, excess production that was never authorized for sale, and cloned devices built to imitate the original can all end up in broker inventory. Some counterfeits contain the wrong die, and some contain no die at all.
Paper Fraud
Not every fake is on the reel. Forged certificates of conformance and falsified traceability documents are used to make questionable parts look like they came from authorized channels.
Authorized Distributor vs. Broker
An authorized or franchised distributor buys directly from the original component manufacturer and can trace every part back to it. That traceability is the single strongest protection against counterfeits, which is why authorized channels should always be your first stop.
Independent distributors and brokers source from the open market: other distributors’ excess, OEM surplus and other brokers. That doesn’t make them all risky. Some run rigorous inspection programs and are certified to SAE AS6081, the standard for counterfeit risk mitigation by distributors. Others are one-person operations reselling whatever they can find. The difference matters far more than the price.
Before buying from a broker, ask:
- Are you certified to AS6081, and can you show the certificate?
- What traceability documentation comes with this lot, and how far back does it go?
- What inspection and testing do you perform, and by which lab?
- What is your guarantee and return policy if parts are found to be suspect?
- Do you report suspect parts to industry databases such as ERAI or GIDEP?
What Component Authentication Testing Actually Catches
SAE AS6171 defines test methods for detecting suspect counterfeit parts, and the level of testing is supposed to match the risk. The common methods each catch different things.
External Visual and Microscopic Inspection
Inspectors examine markings, surface texture, lead condition and packaging against known-good references. Resurfacing, inconsistent fonts, sanding marks and bent or re-tinned leads often show up here. Marking permanency tests, which apply solvents to the part’s surface, can reveal blacktopping and remarking.
X-Ray Inspection
X-ray lets inspectors see the die and lead frame without opening the part, compare them to a known-good sample, and check that every part in a lot matches. Wrong-die and no-die counterfeits are frequently caught this way.
X-Ray Fluorescence (XRF)
XRF measures the elemental composition of lead finishes, which can reveal parts that have been re-tinned or that don’t match the manufacturer’s stated finish.
Decapsulation
Removing the package to examine the die directly confirms the manufacturer’s die markings and part identity. It’s destructive, so it’s performed on samples.
Electrical Testing
Curve tracing and functional testing confirm that parts behave electrically like genuine ones. Testing across temperature is the way to catch parts remarked with an upgraded temperature grade.
What Testing Doesn’t Catch
Most authentication is performed on a sample, so it tells you about the lot, not every part in it. It won’t reliably detect latent damage from previous use, poor storage or electrostatic discharge, and a genuine part that was mishandled by a broker can still fail at reflow. Testing reduces risk. It doesn’t remove it.
How to Buy on the Open Market Without Gambling a Build
- Exhaust authorized sources first. Check every franchised distributor and the manufacturer directly before going to the open market.
- Approve alternates before you need them. An engineering-approved alternate from an authorized source is almost always safer than the original part from an unknown broker.
- Vet the broker, not just the price. Use the questions above and walk away from anyone who won’t answer them.
- Set the test level by risk. A part in a safety-critical or high-reliability product warrants more testing than one in a low-consequence application.
- Buy from as few lots and date codes as possible. Mixed lots make inspection harder and results less meaningful.
- Quarantine and inspect on receipt. Nothing from the open market should go into production until it has passed incoming inspection.
- Keep records and report suspect parts. Documentation protects you, and reporting to ERAI or GIDEP protects everyone else.
If you’re a defense contractor, DFARS clauses 252.246-7007 and 252.246-7008 set specific requirements for counterfeit detection and sourcing from trusted suppliers. Your purchasing process needs to satisfy them, and your contract manufacturer’s purchasing process does too.
How Thomas Instrumentation Approaches Part Quality
Counterfeit prevention is one part of a broader quality system, which we describe in our guide to quality assurance in contract manufacturing. Our production line includes automated optical inspection and X-ray inspection, and our processes are built around ISO 9001:2015 quality standards. For customers in military and defense electronics, we treat part provenance as seriously as workmanship. We also have a few long-term relationships with trusted brokers that have tested and delivered quality parts over time.
Where parts come from is also part of the case for USA-based electronics manufacturing, since shorter, more visible supply chains are easier to verify.
Frequently Asked Questions About Counterfeit Components
Why do counterfeit electronic components increase during shortages?
When authorized stock runs out, buyers turn to brokers and the open market, and high prices make fraud profitable. Counterfeiters take advantage of the urgency and relaxed purchasing standards that shortages create.
What is the difference between an authorized distributor and a broker?
An authorized distributor buys directly from the component manufacturer and provides full traceability. A broker, or independent distributor, sources from the open market, and its reliability depends on its own inspection, testing and certification practices.
How are counterfeit components detected?
Common methods include visual and microscopic inspection, marking permanency testing, X-ray, X-ray fluorescence, decapsulation and electrical testing. SAE AS6171 defines these methods and how to match the level of testing to the risk.
Are gray market electronic parts always counterfeit?
No. Many open-market parts are genuine surplus. The risk is that without traceability to the original manufacturer, you can’t confirm authenticity or handling history without testing.
Source Parts You Can Trust
If a part on your BOM has gone to allocation and you’re being offered stock from sources you don’t know, talk to us before you buy. We’ll help you weigh the options and keep the build on solid ground. Contact Thomas Instrumentation to talk through your sourcing.
