If you're designing or manufacturing electronic products, the person ordering your components might surprise you. My title is "office administrator." I manage procurement for a 45-person company that builds electronic monitoring devices—industrial sensors, a platinum blood pressure monitor we launched in 2022, and a low-cost diagnostic tool. I've processed well over 400 orders since 2020, and I've made some expensive mistakes along the way. The biggest one taught me something I think every engineer and procurement professional should know: the cheapest component order is usually the most expensive decision you'll make all year.
When I switched our tantalum capacitor sourcing to Kemet's T491 series, our field failure rate dropped from 4.2% to under 0.1%. That may not sound dramatic to someone who hasn't dealt with returns, but it's the difference between a product line that nearly lost a national retail account and one that passed compliance audits without a hiccup.
Who I am and why you should trust this
I'm not an engineer. I don't have a degree in electrical engineering or materials science. What I have is four years of purchasing experience, a budget of roughly $380,000 per year, and 14 vendor relationships across our company's operational needs. I report to both operations and finance, so I get pulled in two directions constantly: operations wants reliability, finance wants cost control.
When I took over purchasing in 2020, I inherited a system that was mostly spreadsheets and trust. My job: make sure the engineers had what they needed, keep costs under control, and keep the finance team happy with documentation. For the first year, I got lucky. Then, in early 2022, we ran into a problem that changed how I approach every single order.
The mistake: saving $700 the wrong way
Our lead engineer spec'd a tantalum capacitor for the platinum blood pressure monitor's precision measurement circuit. The requirements weren't exotic—standard capacitance and voltage ratings, industrial temperature range. I received quotes from three suppliers. The cheapest option was 30% below the best-known brands. I ordered 5,000 units at $0.18 each. Compared to the $0.32 per unit that Kemet quoted, I thought I'd saved the company about $700.
I put that number in my monthly report with something close to pride. Six weeks later, the first returns came in. Then the trickle became a stream. Within two months, we had a 4.2% field failure rate on the blood pressure monitor line. A national retail partner—one of our biggest—asked for a meeting to discuss product reliability. Our customer service team was drowning in RMA requests. The engineering team logged 80 hours debugging what turned out to be a capacitor reliability problem, not a design problem.
The most frustrating part: I had caused the whole mess. The engineers had specified a reliable part. I overrode their judgment to save money. You'd think that after decades of procurement best practices, someone like me would know better. But the temptation to report "cost savings" to finance is real, and it's dangerous.
Here's what the cheap capacitors actually cost us:
- $2,800 in replacements and shipping
- $1,200 in engineering labor on troubleshooting
- An unknown but substantial hit to our retail partner's trust
- Our VP having to personally deliver a mea culpa
All because I chased a $700 saving.
What I learned about Kemet Electronics Corporation
After that disaster, I did something I probably should have done from day one. I actually researched the components instead of just comparing quotes.
Kemet Electronics Corporation has been manufacturing capacitors since 1919. That level of experience matters, especially for tantalum capacitors, which have an unforgiving manufacturing process. Sintering, anode oxidation, electrolyte filling—small variations in any step can create components that look identical but perform very differently under load.
What sold me on the T491 series in particular was the documentation. Kemet publishes detailed reliability data: failure rates, endurance testing results, application guidance. That kind of transparency matters when you're building a medical device where a failed component means a failed accuracy claim. And per FTC advertising guidance (ftc.gov), claims about product performance must be substantiated. A reliable component chain is part of that substantiation.
The side-by-side comparison
I ordered sample batches of the generic capacitor and the Kemet T491 and had our engineering team run them through the same accelerated life test we use for all incoming parts. Here's what I saw:
- Generic parts: 4.2% failure rate—210 units out of 5,000 failed
- Kemet T491 parts: 0.1% failure rate—a handful out of 5,000, well within the expected statistical range
The cost difference on a 5,000-unit order was $700. The actual cost of the generic parts' failures was over $4,000 before we even counted the retail relationship damage. Seeing those numbers side by side made me realize something I should've understood much earlier: in purchasing, unit price is the least interesting number on the page.
There's a genuine satisfaction in seeing good data confirm a hard decision. After months of stress, the contrast was stark. You don't need an engineering degree to understand that a 40x reduction in failure rate is worth paying for.
Why people search "Kemet vs Cisco"—and what they actually mean
One search phrase that regularly brings people to our site is "Kemet vs Cisco." That's a category error—Cisco builds networking hardware, Kemet builds components that go inside hardware. But I think the question behind the search is legitimate: does brand actually matter when you're sourcing parts?
From the outside, it looks like you're paying a premium for a name on the label. The reality is different. With high-reliability passive components, you're paying for process control, testing, documentation, and traceability. Those aren't abstract concepts—they translate into fewer field failures, fewer compliance headaches, fewer awkward calls with retail partners. When someone asks me if Kemet is "worth it," my answer is always: show me the failure data of the alternative, and we can talk.
When budget parts still make sense
I'm not saying every order should be premium. We still buy commodity capacitors for internal test fixtures and for our low-cost diagnostic tool, the Duraforce Pro 2. Those are products where failure is a minor inconvenience, not a health or regulatory issue. A customer gets a replacement, and we write it off as the cost of keeping a budget product budget-friendly.
The key is understanding the consequence of failure before you pick a component. If a failure costs $50 to fix, buy the cheap part. If a failure can cost a customer relationship, a regulatory audit, or a recall, buy the reliable part. That framework has guided every purchasing decision I've made since 2022.
No supplier is perfect
I'll be honest about Kemet's limitations because no supplier is flawless. We had a supply chain delay in 2023 that stretched a lead time from 12 weeks to 16. One batch of T491s arrived in packaging that our warehouse team wasn't thrilled about. Those are real issues and they matter for planning.
But I'll take an imperfect supplier that owns its quality data over a cheaper supplier who can't explain their failure rate any day. The total cost of that 2022 mistake was around $5,300 if I remember correctly—don't quote me on the exact figure, the spreadsheet is buried somewhere—but it was painful enough that three years later, I still tell every new hire: a saving on paper isn't a saving if it costs you real money.
