Tantalum capacitors are having a moment. Your BOM won't enjoy it.

Everyone's been moaning about memory prices this year. Fair enough. But the part giving our buyers grey hair lately is about the size of a grain of rice.

Tantalum capacitors.

You'll find them on pretty much every board that crosses our desk. Power rails, battery management, anything that needs a lot of capacitance squeezed into a tiny, stable package. Nobody thinks about them much... until a quote comes back at 30 weeks.

So, what happened?

The metal went up. A lot.

TrendForce has tantalum ingot prices going from RMB 2,600/kg at the end of 2025 to RMB 6,650/kg by August. That's nearly triple, in about eight months. Lead times followed. Mordor Intelligence puts them at 18 to 40 weeks this year, up from eight to ten weeks in late 2025, and suppliers have added 15 to 30% surcharges for the privilege. Some automotive lines are being quoted at over a year.

Over a year. For a capacitor.

The bit that's close to home

About half the world's tantalum ore comes out of the DRC. In January, a collapse at the Rubaya mine stopped production, then the March rains had another go at it. Argus Media reported tantalum concentrate prices up 43% in the first seven weeks of the year, as supply trading through Rwanda dried up almost overnight.

Then there's AI. Data centres are hoovering up tantalum capacitors. A single AI server board can carry around 25 of them, and TrendForce reckons AI demand for tantalum is growing at 62% a year.

So picture it. A landslide a few thousand kilometres north of Joburg and a data centre on the other side of the world, both fighting over the same part your line needs in March.

Where does that leave a South African manufacturer?

Near the back of the queue, if we're being blunt. The big AI and automotive buyers have signed long-term agreements, and the rest of us get what's left.

It's not hopeless, though. Passive Components found that buyers who forecast and share demand early mostly keep their access to supply. It's the last-minute orders paying more and waiting longer. We've watched that play out in every shortage since 2010... we started life as the ER for electronic components, so we've seen a few. Different part, same story.

Can you design around it? Sometimes. TrendForce mentions solid aluminium electrolytics as an option, easier to find and steadier on price. They're bigger, though, so you're looking at a layout change and requalification. And please don't just swap in a ceramic and hope for the best. Some voltage regulators rely on a tantalum's characteristics to stay stable, and a ceramic in that spot can turn your power supply into a very expensive oscillator.

What we'd do this week

Find every tantalum line in your BOMs and check how many are sole source. You might be surprised.
Send us your forecast for the next six to twelve months. Allocation tends to go to whoever asked first.
Start testing alternates on the riskiest lines now, not when the shortage notice lands.

The first one sounds easy. It isn't. Going through a 200-line BOM by hand is nobody's idea of a good Tuesday.

Which is why we built the BOM Health Report. It reads every line, flags lifecycle risk, sole-source parts and long lead times, suggests alternates (our team checks those with yours, we don't just guess), and gives you a production readiness score before you commit to anything.

So here's our ask. Let us provide a Health Report for your next RFQ. Send it to info@sevenlabs.co.za or straight to your account manager, and we'll show you where your tantalum exposure is hiding. Worst case, you get a free second opinion. Best case, we find the 40-week part before it finds you.

Move to Effortless.

Sources

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