Multi-Layer Capacitors

Multi-layer ceramic capacitors (MLCCs) are surface-mount chip capacitors that provide high-frequency filtering and decoupling in an extremely compact footprint.

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  • Multilayer Ceramic Capacitor (MLCC) 50V
    Multilayer Ceramic Capacitor (MLCC) 50V
    SKU: MULTILAYER-CERAMIC-CAP-50V-GROUP
    Multilayer ceramic capacitors (MLCC), 50V. 10 values: 2.2nF – 0.47µF. Non-polarized, better stability than disc ceramic. Suited for decoupling and power supply filtering.
    The price depends on the options chosen on the product page

    Starting at $0.35

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Multi-layer ceramic capacitors (MLCCs) are surface-mount chip capacitors that provide high-frequency filtering and decoupling in an extremely compact footprint. Built by stacking dozens of thin ceramic dielectric layers alternating with metal electrode layers, MLCCs achieve higher capacitance per unit volume than single-layer ceramic disc capacitors while maintaining excellent high-frequency performance. They are the standard capacitor type on modern PCBs — virtually every commercial circuit board from smartphone internals to automotive control modules uses MLCCs for supply decoupling, signal filtering, and noise suppression. For hobbyists designing custom PCBs for LED controllers, addressable LED strip drivers, DCC model railroad decoders, and sensor-equipped lighting systems, MLCCs are the correct choice when through-hole ceramic disc capacitors are too large.

Why surface-mount? Through-hole components like ceramic disc capacitors have wire leads that pass through holes in the PCB. This works well for hand-soldered prototypes and breadboard projects, but the leads add parasitic inductance that degrades high-frequency filtering performance, and the physical height of the component sticks up from the board surface. MLCCs sit flat on the board surface, soldered directly to pads with minimal lead length. This near-zero parasitic inductance gives them superior high-frequency performance — they can effectively filter noise at frequencies from kHz into the GHz range. For LED projects, this means cleaner power delivery to microcontrollers and LED driver ICs, resulting in stable PWM timing, reliable communication with addressable LED strips (WS2812B, SK6812, APA102), and noise-free analog sensor readings in sensor-triggered lighting installations.

MLCCs are non-polarized, just like their through-hole ceramic disc counterparts. They can be soldered in either orientation, eliminating the polarity concerns that come with electrolytic capacitors. This simplifies board layout and eliminates a common source of assembly errors. The chip package is marked with the capacitance value code on the top surface, though the markings can be difficult to read without magnification on smaller packages. Best practice is to keep MLCCs in their labeled packaging until the moment of installation to avoid mix-ups between similar-looking values.

Applications in LED circuits: The primary role of an MLCC in an LED project is IC decoupling — a 0.1µF (100nF) MLCC placed between the VCC and GND pads of each IC on your PCB, as close to the power pins as possible. This absorbs the transient current spikes that occur when the IC switches internally, preventing those spikes from rippling through the power plane and affecting other components. For Arduino-based LED controllers, ESP32 WiFi-controlled lighting, and ATtiny-based miniature lighting modules, the MLCC decoupling capacitor is what keeps the microcontroller running reliably while rapidly switching GPIO pins to drive LEDs. Without proper decoupling, microcontrollers can exhibit random resets, corrupted serial communication, and erratic PWM output that shows up as flickering or color shifting in the LEDs.

Addressable LED strip applications: Projects using WS2812B, SK6812, or APA102 addressable LED strips benefit from MLCCs placed at regular intervals along the strip's power bus, especially on long runs or high-density strips. A 0.1µF MLCC every 0.5m to 1m along the power feed helps absorb the sharp current transients that occur when hundreds of LEDs simultaneously change color. Some addressable LED strip designs already include per-LED decoupling capacitors on the flexible PCB, but adding supplemental MLCCs at the power injection points improves reliability — particularly at high brightness levels where total current draw can reach several amps and voltage sag at the far end of the strip causes color inconsistency.

DCC model railroad decoder applications: Builders installing DCC decoders in N-scale and HO-scale locomotives often work with extremely tight physical constraints where even small through-hole components are too large. MLCCs provide the decoupling and filtering functions needed by the decoder IC in a chip package that fits inside a locomotive shell alongside the motor, decoder board, and wiring harness. A 0.1µF MLCC on the decoder's power pins, plus a 0.01µF on the motor output for EMI suppression, keeps the decoder operating reliably in the electrically noisy environment of a model railroad layout where DCC track power, motor commutation noise, and multiple locomotive transmissions all share the same rail system.

Soldering MLCCs by hand: Surface-mount components require different soldering technique than through-hole parts. For MLCCs, the standard hand-soldering approach is to tin one pad with a small amount of solder, position the MLCC with tweezers, and tack that end down by reheating the tinned pad. Then solder the second pad. Use a fine-tipped soldering iron (conical or chisel tip, 0.5mm to 1.5mm), thin solder wire (0.5mm or 0.6mm), and optionally flux to improve wetting. Alternatively, for boards with many SMD components, use solder paste applied with a stencil and reflow in a toaster oven or hot air station. Practice on a scrap board first if you are new to SMD soldering — the technique is different from through-hole but learnable with a few minutes of practice. If surface-mount soldering is not something you want to tackle, use our through-hole ceramic disc capacitors instead — they provide the same decoupling function in a larger, easier-to-solder package.

Frequently Asked Questions

MLCC stands for Multi-Layer Ceramic Capacitor. It is a surface-mount chip capacitor built by stacking multiple thin ceramic dielectric layers with interleaved metal electrodes, then firing them into a single monolithic block with terminations on each end. Use MLCCs when you are designing a custom PCB and need compact, high-performance decoupling and filtering. For breadboard prototyping and through-hole projects, use ceramic disc capacitors instead — they provide the same function in a through-hole package.
Not directly — MLCCs are surface-mount components without wire leads, so they cannot plug into breadboard holes. You can solder short wire leads onto an MLCC to adapt it for breadboard use, but this is fiddly and negates the size advantage. For breadboard prototyping, use through-hole ceramic disc capacitors instead. They provide the same capacitance values and decoupling performance in a breadboard-friendly package. Reserve MLCCs for custom PCB designs where board space is limited.
No. Multi-layer ceramic capacitors are non-polarized and can be soldered in either orientation. There is no positive or negative terminal. This is one of the advantages of ceramic capacitors over electrolytic capacitors, which are polarized and must be installed with correct polarity. For PCB layout, you can route the pads in whichever orientation makes your traces cleanest.
Both use ceramic as the dielectric, but they differ in construction and form factor. A ceramic disc capacitor is a single-layer through-hole component with wire leads — designed for breadboards, perfboards, and hand-soldered PCBs. An MLCC is a multi-layer surface-mount chip component with no leads — designed for automated PCB assembly and compact layouts. MLCCs pack more capacitance into a smaller volume thanks to their stacked internal structure and offer better high-frequency performance due to shorter current paths. Choose disc capacitors for prototyping and MLCCs for production PCBs.
Use a 0.1µF (100nF) MLCC on each VCC/GND pin pair of the microcontroller, placed as close to the pins as possible on the PCB. This is the universal decoupling standard for Arduino, ESP32, ATtiny, STM32, and virtually every other microcontroller. For microcontrollers with multiple VCC pins (like the ATmega328P or ESP32), place a separate 0.1µF MLCC on each VCC pin. Some designs add a second, smaller MLCC (0.01µF / 10nF) in parallel for additional high-frequency filtering, but the 0.1µF alone is sufficient for most LED controller projects.
Tin one PCB pad with a small amount of solder. Hold the MLCC with fine tweezers and position it on the pads. Reheat the tinned pad to tack the MLCC in place, then solder the second pad. Use a fine-tipped iron (0.5–1.5mm tip), thin solder wire (0.5mm or 0.6mm), and optionally flux to improve solder flow. Do not apply excessive heat — ceramic capacitors can crack if overheated. If the chip is very small, work under magnification. For boards with many MLCCs, consider solder paste and reflow (toaster oven or hot air station) for faster, more consistent results.