Selection guides, in-depth tutorials and technical parameters
Capacitor lead times in 2026 have stretched from weeks to months, and on AI-grade MLCC a ten-month quote is no longer unusual. Ordering more will not fix that. The buyers holding their schedules together are the ones who know which lines on the bill of materials have to be locked, commit on those before allocation begins, [...]
Selecting a capacitor for an AI server power stage starts with three numbers: the rail's voltage, its power or ripple current, and the ambient temperature it runs in. Once you have those, match the rail's role to the right capacitor type—aluminum electrolytic for 380 V rectifier and 48 V intermediate rails, polymer or MLCC for low-voltage [...]
An AI server power chain is a stack of voltage rails, not one part. From the 380 V rectified bus at the inlet to a 1 V GPU core, every stage has a different job and every stage pulls a different capacitor. Getting the choice right at each level is where AI-optimized power supplies earn their [...]
Capacitors do three jobs inside a switching power supply - smoothing the rail, decoupling the load and storing energy across the switching gap. In AI servers those jobs get harder: higher ripple current, faster switching and tighter rails push the capacitor to its limit. AI-optimized servers are forecast to consume 175 TWh in 2026, up 84% [...]
What to Consider When Choosing a Capacitor Choosing the right capacitor is about matching real circuit requirements — capacitance, voltage, ESR, temperature and frequency — not just reading nominal values. A capacitor that works in one role may fail in another: an aluminum electrolytic that smooths a power rail is the wrong choice for a high-frequency [...]