MLCC Sourcing After the Shortage: What Buyers Should Know

Sep 15, 2026

Few components taught buyers more lessons than the multilayer ceramic capacitor (MLCC). During the peak shortage, lead times stretched to many months and prices multiplied — and counterfeit and recycled capacitors flooded the market. The market has cooled, but the lessons remain relevant.

**Know the dielectric grades**

MLCCs are defined by their dielectric:

- C0G (NP0): stable capacitance across temperature, low loss — for precision circuits.
- X7R: ±15% over -55°C to +125°C — the workhorse for decoupling and general use.
- X5R: similar behavior over -55°C to +85°C — smaller and cheaper, common in consumer designs.
- Y5V/Z5U: high capacitance in small sizes but very unstable — avoid in precision applications.

Using the right grade matters more than squeezing the lowest price, especially in power and automotive circuits.

**Watch the voltage derating rule**

MLCC capacitance drops under DC bias. A 100 nF X7R capacitor rated at 50 V used at low voltage is fine, but a capacitor rated close to its operating voltage can lose a significant share of its nominal capacitance. Always derate — as a rule of thumb, choose a voltage rating at least twice the working voltage.

**Size and value basics**

- 0402, 0603 and 0805 are the most common package sizes. 0603 remains the practical sweet spot between board space and handling ease.
- Common values such as 100 nF (104) and 1 µF in 0603/0805 are stocked in depth by most reputable distributors; exotic values and sizes still carry longer lead times.

**What the shortage taught us**

1. Verify the source. Counterfeit capacitors — often rebranded or lower-grade parts — appeared in large volumes during allocation. Buy only from distributors that provide traceable stock and documentation.
2. Plan for allocation. Identify the capacitors critical to your BOM and secure buffer stock for the long-lead items, rather than discovering a hole mid-production.
3. Qualify alternates early. X5R vs X7R, or a different manufacturer with the same footprint, can be a life-saver when the primary part is allocated — but only if you qualified it before you needed it.
4. Beware of date-code dumping. Old stock sold as new is common. Check date codes and CoC when buying in volume.

At ChipMart, passive components from Yageo, Murata, TDK, KEMET and other leading brands are available across common sizes and values, with batch photos and documentation on request — so your BOM can stay as stable as your production plan.