Smd Electrolytic Capacitor Code Chart

4 min read Jun 26, 2024
Smd Electrolytic Capacitor Code Chart

SMD Electrolytic Capacitor Code Chart: A Comprehensive Guide

Are you working with surface-mount devices (SMDs) and need to decipher the cryptic codes on electrolytic capacitors? Look no further! In this article, we'll break down the SMD electrolytic capacitor code chart, helping you to quickly identify the key characteristics of these components.

What is an SMD Electrolytic Capacitor?

An SMD electrolytic capacitor is a type of capacitor that uses an electrolyte to achieve high capacitance values in a small package. They are widely used in electronic circuits for power supply filtering, decoupling, and other applications.

Understanding the Code Chart

The code chart for SMD electrolytic capacitors typically consists of a combination of letters and numbers that provide essential information about the component. Here's a breakdown of the typical code structure:

Capacitance Value

The capacitance value is usually represented by a three-digit code:

  • The first digit represents the significant digits of the capacitance value.
  • The second digit represents the multiplier (number of zeros to add to the significant digits).
  • The third digit represents the tolerance ( accuracy) of the capacitance value.

Voltage Rating

The voltage rating is typically represented by a single letter or a combination of letters:

  • A = 10V
  • B = 16V
  • C = 25V
  • D = 35V
  • E = 50V
  • F = 63V
  • G = 100V

Temperature Rating

The temperature rating is usually represented by a single letter:

  • X = -40°C to +85°C
  • Y = -40°C to +125°C
  • Z = -55°C to +125°C

Other Characteristics

Additional characteristics, such as the ESR (Equivalent Series Resistance) or ripple current, may be represented by separate codes or markings on the component.

Example Code Breakdown

Let's take an example code: 106A335X

  • 106: Capacitance value = 10uF (10 x 10^6)
  • A: Voltage rating = 10V
  • 335: Not applicable in this case (would represent ESR or ripple current)
  • X: Temperature rating = -40°C to +85°C


Mastering the SMD electrolytic capacitor code chart is essential for working with these components. By understanding the breakdown of the code, you can quickly identify the key characteristics of an SMD electrolytic capacitor, ensuring that you select the correct component for your design.

Tips and Tricks

  • Always check the datasheet for specific component information.
  • Be aware of the tolerances and variations in capacitance values.
  • Use online calculators or tools to simplify the code breakdown process.