How to Evaluate an Electronic Component Supplier

Most supplier evaluation in electronics happens at the worst possible moment: a part is on allocation, three companies have replied, one of them is 40% cheaper than the others, and someone has to decide by the end of the day whether that price is a find or a warning.

A framework does not remove the time pressure. It removes the part of the decision that should have been settled weeks earlier, so that what is left is just the commercial call.

Separate the two questions you are actually asking

Supplier evaluation collapses if you treat it as one judgement. It is two.

Is this company competent and accountable? A slow, one-time evaluation. Certifications, insurance, ownership structure, references, fraud-database history. It rarely changes month to month, so it can be done before you need anything.

Is this offer good? A fast, per-transaction judgement. Price, stock verification, lead time, date codes, packaging, payment terms.

Companies that fail on the first question can still produce attractive answers to the second — that is precisely the shape of the problem. Doing the slow evaluation only when the fast one is already urgent is how bad lots get bought.

The certifications that carry weight

Not all of them are equal, and several mean less than the logo implies.

• ISO 9001:2015 — a quality management system, independently audited. The floor, not a differentiator. Its absence is informative; its presence is not.
• AS9120 — the aerospace standard for distributors, covering traceability, record retention and control of the supply chain. Meaningful if your boards go anywhere near aerospace or defence.
• AS6081 — the counterfeit-avoidance standard for distributors: supplier approval, inspection planning, quarantine and reporting of suspect parts. Since Revision A in 2023 it defers to AS6171 for the actual test methods.
• ERAI membership — access to and participation in the industry’s counterfeit and non-conformance reporting database. Worth confirming the membership is current, and asking whether they actually screen against it before using a supplier.

Ask for the certificate, not the claim. Check the issuing body and the expiry date. A surprising number of published certifications lapsed years ago.

The question that separates a trader from a principal

Ask who is the seller of record on the invoice.

If the company introduces you to a supplier and takes a commission, you own the risk. Their exposure ends at the introduction. When the parts are wrong, you are in a dispute with a company you have never dealt with, often in another jurisdiction, with an intermediary whose incentive to help ended when the introduction closed.

If the company buys the parts, takes title, and resells to you as principal, the risk is theirs. There is one contract, one invoice, and one counterparty who is liable for what arrives.

This single structural fact does more work in a dispute than any certification. It is also the question most rarely asked before a first PO.

What to verify on each offer

Once a supplier has passed the slow evaluation, per-transaction diligence gets short:

• Stock verification. Does the supplier hold the parts, or are they quoting someone else’s list? Ask when they physically had eyes on it.
• Date codes and packaging. Original reels, MSL bags with intact desiccant and indicator cards, uniform date codes that make sense against the part’s production history. Impossibly uniform codes across separate reels is a contradiction worth chasing.
• Traceability. Where did it come from, and how many hands ago? “Excess from an OEM build” is a specific, checkable claim. “Our stock” is not.
• Test plan. What screening runs before shipment, at what risk level, and do you receive the report before the parts move?
• Payment terms. Full payment before shipment, on a part you cannot inspect, from a supplier you have not used, is where most losses actually happen.

What the price is telling you

A quote well below the market on an allocated part is data, not a discount. There are legitimate explanations — cancelled build, a plant closure, inventory someone has to clear before a fiscal year end — and they share a property: the supplier can tell you which one it is, specifically, and the story survives a follow-up question.

The illegitimate explanations do not survive follow-up questions. Ask for the provenance and see whether the answer gets more precise or more general.

Red flags worth walking away from

• Payment to an account in a name that does not match the company.
• A newly registered domain with a full catalogue and no verifiable history.
• Refusal to allow third-party testing, or to release parts against a report.
• Prices consistently at the market floor across every part you ask about — real inventory is lumpy, and nobody is cheapest on everything.
• Pressure to close today on stock that “another buyer is also looking at.”

Re-evaluate on outcomes, not on impressions

The evaluation that matters most is the one you do after the parts arrive: was the delivery on the promised date, was the documentation complete, did the lot pass inspection, did anything need a claim, and how was the claim handled.

Three clean deliveries tell you more than any certificate. So does one badly handled non-conformance.

How Makat handles it

We run the slow evaluation so our buyers do not have to run it under time pressure. Suppliers are screened against ERAI data and blacklists before they are used, parts without full manufacturer traceability are tested by accredited labs before they ship, and we are ISO 9001:2015 certified and an ERAI member with $10M in product liability insurance behind the sale.

The structural part matters more than any of that: we buy and resell as principal. Makat is the Vendor of Record on your invoice, so there is one company accountable for the parts — you never negotiate with, or chase, the supplier behind them. More on how we work with suppliers.