Electrolytic Capacitor Smd Code

4 min read Jun 26, 2024
Electrolytic Capacitor Smd Code

Electrolytic Capacitor SMD Code: A Comprehensive Guide

Introduction

Electrolytic capacitors are a type of capacitor that uses an electrolyte to achieve higher capacitance values than other types of capacitors. They are widely used in electronic circuits for filtering, regulation, and decoupling applications. In Surface Mount Device (SMD) technology, electrolytic capacitors are represented by a unique code that helps identify their specifications and characteristics. In this article, we will explore the electrolytic capacitor SMD code and how to decipher it.

SMD Code Structure

The SMD code for electrolytic capacitors consists of several digits and letters that provide information about the capacitor's characteristics. The code structure is as follows:

[X] [Y] [Z] [Capacitance Value] [Voltage Rating] [Temperature Rating]

  • [X]: Package code (e.g., A, B, C, D)
  • [Y]: Terminal style (e.g., R, S, T)
  • [Z]: Capacitor size code (e.g., 1, 2, 3)
  • [Capacitance Value]: Capacitance value in μF (e.g., 10, 22, 47)
  • [Voltage Rating]: Voltage rating in V (e.g., 10, 16, 25)
  • [Temperature Rating]: Temperature rating in °C (e.g., 85, 105, 125)

Deciphering the SMD Code

Let's take an example of an electrolytic capacitor with the SMD code: A332K160V.

  • A: Package code, which indicates a rectangular package with a length of 3.3 mm and a width of 1.6 mm.
  • 3: Capacitor size code, which indicates a diameter of 3 mm.
  • 32: Capacitance value of 3.2 μF.
  • K: Voltage rating of 10 V.
  • 160: Temperature rating of 125°C.
  • V: Indicates that the capacitor is an electrolytic type.

SMD Code Examples

Here are some examples of electrolytic capacitor SMD codes and their corresponding specifications:

SMD Code Capacitance Value Voltage Rating Temperature Rating
A102K050V 10 μF 5 V 125°C
B222M160V 22 μF 16 V 125°C
C473K035V 47 μF 3.5 V 85°C
D105K250V 10 μF 25 V 105°C

Conclusion

The electrolytic capacitor SMD code provides a concise way to identify the specifications and characteristics of an electrolytic capacitor in an SMD package. By understanding the code structure and deciphering the individual digits and letters, designers and engineers can quickly determine the suitability of an electrolytic capacitor for their specific application.

Further Reading

  • IPC-7251: Terms and Definitions for Interconnecting and Packaging Electronic Circuits
  • MIL-C-39006: Capacitors, Fixed, Electrolytic (Non-Sealable)
  • IEC 60384-4: Fixed capacitors for use in electronic equipment - Part 4: Sectional specification - Fixed aluminium electrolytic capacitors with non-solid electrolyte