Article ID : 00163798 / Last Modified : 11/04/2018

What are the different class ratings for SD, SDHC, and SDXC memory cards?

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The following are the class ratings for SD, SDHC and SDXC memory cards:

  • Class 2: Recommended for Standard Definition video recording
  • Class 4: Recommended for High Definition video recording
  • Class 6: Recommended for High Definition video recording 
  • Class 10: Recommended for Full High Definition video recording
  • UHS Class 1 (U1): For recording large-sized High Definition video
  • UHS Class 3 (U3): Capable of recording 4K video

NOTE: The class rating represents the minimum writing performance for recording video.