Resistor Sizes and Packages

 
Resistor Sizes and Packages

Resistors are available in a large amount of different packages. Nowadays the most used are the rectangular surface mount resistors, but also the good old axial resistor is still used extensively in through hole designs. This page will inform you about the dimensions of SMD, axial and MELF packages and about the required land patterns for SMD components. SMD resistor sizes The shape and size of surface mount resistors are standardized, most manufacturers use the JEDEC standards. The size of SMD resistors is indicated by a numerical code, such as 0603. This code contains the width and height of the package. So in the example of 0603 Imperial code, this indicates a length of 0.060″ and a width of 0.030″. This code can be given in Imperial or Metric units, in general the Imperial code is used more often to indicate the package size. On the contrary in modern PCB design metric units (mm) are more often used, this can be confusing. In general you can assume the code is in imperial units, but the dimensions used are in mm. The SMD resistor size depends mainly on the required power rating. The following table lists the dimensions and specifications of commonly used surface mount packages.  Code Length (l) Width (w) Height (h) Power Imperial Metric inch mm inch mm inch mm Watt 0201 0603 0.024 0.6 0.012 0.3 0.01 0.25 1/20 (0.05) 0402 1005 0.04 1.0 0.02 0.5 0.014 0.35 1/16 (0.062) 0603 1608 0.06 1.55 0.03 0.85 0.018 0.45 1/10 (0.10) 0805 2012 0.08 2.0 0.05 1.2 0.018 0.45 1/8 (0.125) 1206 3216 0.12 3.2 0.06 1.6 0.022 0.55 1/4 (0.25) 1210 3225 0.12 3.2 0.10 2.5 0.022 0.55 1/2 (0.50) 1218 3246 0.12 3.2 0.18 4.6 0.022 0.55 1 2010 5025 0.20 5.0 0.10 2.5 0.024 0.6 3/4 [... read more]