The Thursday That Changed My Approval Process
It was a Thursday afternoon in July 2019. I'd just approved a rush order for 500 Vishay capacitors — part of the 293D series, nothing exotic. The customer was a medical device contractor, and they needed the parts by the following Wednesday. Standard story, right?
I checked the part number. Checked the quantity. Checked the price. Everything looked fine. I hit 'approve' and moved on to the next thing.
Three weeks later, that order came back with a rejection notice. All 500 units, returned. Cost to me: $890 in re-labeling fees plus a 1-week production delay. The reason? A ROHS compliance discrepancy between what we ordered and what the documentation said.
That's when I learned a lesson I should have known from the start: when it comes to ROHS compliance, you don't just check — you verify.
What Actually Went Wrong
The Vishay capacitor I ordered was listed as ROHS compliant in our internal system. And technically, it was. The issue was that the specific date code batch we received had slightly different documentation than what our customer's compliance team expected.
Wait — let me back up. I'm making this sound more complicated than it actually was.
The real problem was plain and simple: we didn't have a formal process for checking ROHS certification against the customer's specific requirements. We assumed 'ROHS compliant' meant one thing. Our customer assumed it meant something slightly different. And Vishay was caught in the middle, just supplying parts according to spec.
I don't have hard data on how many companies make this mistake, but based on our experience over the following two years, my sense is it's somewhere around 15-20% of first-time medical or defense orders. That's a lot of $890 mistakes floating around.
What 'Vishay ROHS' Actually Covers
Vishay publishes ROHS compliance documentation for nearly every component they make. But here's the thing people miss: ROHS compliance isn't a single checkbox. It's a set of directives — 2011/65/EU being the current one — and depending on your industry, you might need to prove compliance against specific exemptions or limits that go beyond the basic standard.
For example, Vishay capacitors are typically ROHS compliant. But some series have exemptions for certain applications, like high-temperature environments or military-grade requirements. If your customer assumes a blanket 'ROHS compliant' covers all scenarios, you're setting yourself up for a mismatch.
How I Fixed It (After the Second Time)
You'd think I'd have learned after the first rejection. But no — the second time happened in May 2020. Different customer, similar problem. This time it was a Vishay inductor, and the ROHS documentation was technically correct but formatted in a way our customer didn't accept.
That was the moment I stopped blaming the customers or the vendors and started building a process.
Here's the checklist I created. We've used it on every Vishay order since June 2020, and it's caught 47 potential issues in the past 18 months:
- Step 1: Get the full ROHS declaration from Vishay's website — not just the part number listing. Download the PDF for the specific date code.
- Step 2: Map the declaration to your customer's requirements — don't assume 'ROHS compliant' matches. Check exemptions, limits, and documentation format.
- Step 3: Send the declaration to the customer before shipping — let them confirm it meets their standards. This step alone saved us from at least 10 rejections.
- Step 4: Keep the declaration on file — for audits, renewals, and repeat orders. Link it to the purchase order in your system.
Sounds obvious, right? But you'd be surprised how many companies skip Step 2 and Step 3. I was one of them.
Why I Still Recommend Vishay
Now, you might read this and think, "So Vishay's ROHS documentation is a problem?" No — that's not the point I'm making.
Vishay's compliance documentation is actually among the better ones in the industry. They publish ROHS certificates, REACH statements, and material declarations on their site. The issue wasn't Vishay — it was our process for interpreting and matching that documentation to customer requirements.
I recommend Vishay capacitors for most applications, especially when you need reliability and a broad product range. But if you're dealing with medical, defense, or any industry with strict compliance requirements, here's my honest advice:
Use Vishay's components. Trust their quality. But don't trust their ROHS documentation to match your customer's expectations without a verification step in between. That mismatch isn't Vishay's fault — it's a process gap on your end.
This solution works for 80% of cases. The other 20%? That's where you need custom documentation or special certifications. Vishay can provide those too — but you have to ask.
If you're sourcing Vishay capacitors for a compliance-sensitive project, I'd recommend setting up that verification checklist before you place your first order. It'll save you the $890 I wasted — and the embarrassment of explaining to your boss why 500 parts are sitting in a returns bin.
So bottom line: Vishay is a solid choice. Just don't skip the compliance check. Your future self will thank you.