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A Guide to SMD Capacitor Size Chart
SMD components use numeric codes like 0402, 0603, 0805, etc. to indicate their physical dimensions. In the imperial system, these codes describe the length and width of surface-mounted components in hundredths of an inch. For example, 0603 represents a component that is approximately 0.06 inches by 0.03 inches.
In the electronics manufacturing industry, SMD size codes may be represented in either imperial units or metric units, even though they may refer to the same physical component size. This can sometimes create confusion when engineers, buyers, or manufacturers order parts from different suppliers. For example, an imperial 0603 package is equivalent to a metric 1608 package, which measures approximately 1.6 mm × 0.8 mm.
In this article, we will discuss SMD capacitor sizes and why engineers use SMD size code charts when selecting capacitors for their PCB assembly projects.
Why SMD Size Chart Matters
Based on the mounting method, components used on a PCB can generally be classified into surface-mount components and through-hole components. Surface-mount components, also known as SMD components, are mounted directly onto copper pads on the PCB surface. Unlike conventional through-hole components with long wire leads, they use metalized terminations instead of through-hole leads, helping save board space and support automated SMT assembly.
For these surface-mount components, size code identification is especially important. These codes define the component’s package dimensions, not its electrical value or performance rating. For SMD capacitors, this means the code identifies the package size, not the capacitance value. If the size code is misunderstood, the selected component may not match the PCB footprint, the solder pads may be incorrect, or the component may create problems during pick-and-place and reflow soldering.
With a reference resource like an SMD size chart, engineers can reduce production errors related to part dimensions and make better component selection decisions based on PCB space, electrical requirements, and assembly conditions.
Common SMD Chip Size Chart
| Size Code | Imperial Size (inches) | Metric Size (mm) | Typical Applications / Assembly Notes |
|---|---|---|---|
| 008004 | 0.008 × 0.004 | 0.2 × 0.1 | Ultra-miniature components for highly compact electronics; requires advanced SMT capability |
| 01005 | 0.016 × 0.008 | 0.4 × 0.2 | Used in smartphones, wearables, and miniature modules; difficult to inspect and rework |
| 0201 | 0.024 × 0.012 | 0.6 × 0.3 | Common in high-density consumer electronics; requires precise pick-and-place control |
| 0402 | 0.040 × 0.020 | 1.0 × 0.5 | Widely used in compact PCB designs; good balance between density and manufacturability |
| 0603 | 0.063 × 0.031 | 1.6 × 0.8 | Very common general-purpose chip size; easier assembly than 0402 and smaller packages |
| 0805 | 0.079 × 0.049 | 2.0 × 1.25 | Common in industrial and general electronics; easier handling, inspection, and rework |
| 1206 | 0.126 × 0.063 | 3.2 × 1.6 | Often used when more electrical or mechanical margin is needed |
| 1210 | 0.126 × 0.098 | 3.2 × 2.5 | Larger chip size for applications requiring more board-level robustness or higher ratings |
| 1806 | 0.177 × 0.063 | 4.5 × 1.6 | Less common rectangular format used for selected chip components |
| 1812 | 0.177 × 0.126 | 4.5 × 3.2 | Used when larger component body size is acceptable for performance or assembly reasons |
| 1825 | 0.177 × 0.252 | 4.5 × 6.4 | Large rectangular SMD package for specialty components and higher-margin designs |
| 2010 | 0.197 × 0.098 | 5.0 × 2.5 | Often used for larger resistors, protection components, and higher-rating chip parts |
| 2220 | 0.224 × 0.197 | 5.7 × 5.0 | Large SMD chip package for specialty, high-rating, or space-tolerant designs |
| 2512 | 0.248 × 0.126 | 6.3 × 3.2 | Common for higher-power chip resistors and larger surface-mount components |
| 2920 | 0.291 × 0.197 | 7.4 × 5.0 | Large chip package often used for resettable fuses, protection devices, and specialty parts |
Why SMD Capacitor Size Matters
Capacitors store electrical charge and perform important circuit functions such as decoupling, filtering, AC coupling, timing, voltage stabilization, and energy buffering. In modern PCB design, these functions often need to be achieved within very limited board space.
SMD capacitor size can influence circuit design and PCB assembly in several ways:
- Board space: Smaller packages such as 0201 and 0402 help save PCB area and support compact layouts in high-density electronics.
- Assembly difficulty: Very small capacitors require accurate PCB footprints, precise pick-and-place control, stable solder paste printing, and a tighter SMT process.
- Capacitance availability: Larger packages such as 0805, 1206, and 1210 are often available in higher capacitance values.
- Voltage rating: Higher voltage ratings are generally easier to achieve in larger packages, although the final rating depends on dielectric type, material system and manufacturer design.
- Solder joint reliability: Package size affects pad design, solder volume, inspection difficulty, and resistance to mechanical stress.
- High-frequency performance: Smaller capacitors can provide shorter current paths and lower parasitic inductance, which is useful for decoupling and noise suppression.
- Thermal and mechanical margin: Larger packages can offer more surface area and stronger solder joints, but they also require proper layout and reflow control.
In each case, the capacitor package size affects not only whether the part fits the PCB, but also whether it meets the electrical and manufacturing requirements of the application. For example, decoupling capacitors near a processor help stabilize voltage during fast load changes, filtering capacitors in communication circuits help reduce high-frequency noise, and bulk capacitors in power circuits help provide temporary energy during peak current demand.
SMD Multilayer Ceramic Capacitor (MLCC) Size Chart
MLCC are among the most frequently used SMD capacitors because they offer compact size, low equivalent series inductance, and good high-frequency performance. MLCC are non-polarized SMD capacitors, which means they do not have a positive or negative orientation during PCB assembly.
| Size Code | Imperial Size (inches) | Metric Size (mm) |
|---|---|---|
| 01005 | 0.016 × 0.008 | 0.4 × 0.2 |
| 0201 | 0.024 × 0.012 | 0.6 × 0.3 |
| 0402 | 0.040 × 0.020 | 1.0 × 0.5 |
| 0603 | 0.063 × 0.031 | 1.6 × 0.8 |
| 0805 | 0.079 × 0.049 | 2.0 × 1.25 |
| 1206 | 0.126 × 0.063 | 3.2 × 1.6 |
| 1210 | 0.126 × 0.098 | 3.2 × 2.5 |
| 1812 | 0.177 × 0.126 | 4.5 × 3.2 |
| 1825 | 0.177 × 0.252 | 4.5 × 6.4 |
| 2220 | 0.224 × 0.197 | 5.7 × 5.0 |
SMD Aluminum Electrolytic Capacitor Size Chart
SMD aluminum electrolytic capacitors often use cylindrical can-style packages. Therefore, they usually do not use chip size codes such as 0402, 0603, or 0805. Instead, manufacturers often use case size codes such as A, B, C, D, or series-specific codes to describe the capacitor body size and mounting structure.
| Case Size Code | Imperial Size (inches) | Metric Size (mm) |
|---|---|---|
| A | 0.248 × 0.213 | 6.3 × 5.4 |
| B | 0.287 × 0.169 | 7.3 × 4.3 |
| C | 0.287 × 0.287 | 7.3 × 7.3 |
| D | 0.315 × 0.248 | 8.0 × 6.3 |
| E | 0.315 × 0.315 | 8.0 × 8.0 |
| F | 0.394 × 0.287 | 10.0 × 7.3 |
| G | 0.394 × 0.394 | 10.0 × 10.0 |
| H | 0.492 × 0.531 | 12.5 × 13.5 |
| I | 0.492 × 0.846 | 12.5 × 21.5 |
| J | 0.630 × 0.394 | 16.0 × 10.0 |
SMD Tantalum Capacitor Size Chart
SMD tantalum capacitors usually use molded case size codes such as A, B, C, D, and E instead of standard chip size codes like 0402 or 0603. These case codes are commonly linked to EIA / metric case references, such as 3216-18 or 7343-31, which describe the approximate package length, width, and height in millimeters.
| Case Size Code | Common EIA / Metric Case | Approx. Metric Size (mm) |
|---|---|---|
| A | 3216-18 | 3.2 × 1.6 |
| B | 3528-21 | 3.5 × 2.8 |
| C | 6032-28 | 6.0 × 3.2 |
| D | 7343-31 | 7.3 × 4.3 |
| E | 7260-38 | 7.2 × 6.0 |
| V / X | 7343-20 / 7343-43 | 7.3 × 4.3 |
SMD Film Capacitor Size Chart
SMD film capacitors usually do not follow standard chip size codes such as 0402, 0603, or 0805, and they are not commonly identified by case codes such as A, B, C, or D. Because film capacitors are often larger and more dependent on dielectric structure and manufacturer design, they are typically specified by actual package dimensions, including length, width, height, terminal style, and recommended PCB land pattern.
| Package / Case Size | Approx. Metric Size (mm) | Typical Notes |
|---|---|---|
| Small SMD film package | 3.2 × 1.6 × 1.6 | Compact signal filtering and coupling applications |
| Medium SMD film package | 4.8 × 3.3 × 2.8 | General filtering, timing, and signal applications |
| Large SMD film package | 6.0 × 4.1 × 3.0 | Higher capacitance or voltage applications |
| Extra-large SMD film package | 7.3 × 5.0 × 3.5 | Snubber, pulse, or power-related applications |
| Power SMD film package | 10.2 × 7.6 × 5.0 | Higher voltage, pulse, or power electronics designs |
Final Thoughts
Having a good understanding of SMD capacitor size codes is essential when selecting the right SMD capacitor for a specific application. Package size is not only related to surface-mount dimensions, but also affects PCB layout, component placement, solder joint reliability, capacitance availability, voltage rating, and overall assembly quality.
By using an SMD capacitor size chart correctly, engineers and purchasing teams can reduce footprint mismatches, avoid assembly issues, and make better decisions when balancing PCB space, electrical performance, and manufacturability.
At PCBCool, we support customers with PCB manufacturing, PCB assembly, and component sourcing for a wide range of electronic products. Whether your project uses compact MLCCs, polarized tantalum capacitors, aluminum electrolytic capacitors, or other SMD components, our engineering and production teams can help review manufacturability, assembly requirements, and component compatibility before production.
Frequently Asked Questions (FAQ)
A: Not always. It depends on the manufacturer, the specific project, and customer requirements. For projects with higher reliability demands, such as medical and automotive electronics, AOI is typically performed on every board.
A: Yes. For projects with special quality requirements, PCBCool can follow customer-defined inspection priorities, acceptance criteria, tolerance ranges, or specific defect control requirements.
John is an experienced specialist in electrical systems, instrumentation, process automation, and industrial control. He has worked on equipment installation, maintenance, factory testing, and commissioning, giving him practical insight into how industrial systems perform in real operating environments.
