SD Cards

SD cards, short for secure digital cards, are compact memory cards commonly used for storage in portable devices. They are removable cards which store data from a device such as a digital camera or smartphone. Some PCs and laptops come with an SD card slot too, or you can purchase a card adapter separately. The compact nature of the card makes it easy to integrate into portable devices.

What size are SD cards?

SD cards come in three different physical sizes, standard, mini and micro. The size you choose depends on which device you plan to use and what card it can be used with.

Each SD memory card will have a capacity size too, given in GB or MB. This refers to the amount of data that can be stored on the card. Larger capacities will be more expensive so it is best to choose an SD memory card that meets your storage needs.

Why would you need an SD card?

Most devices today come with built-in memory storage to a certain capacity. However, it is very easy to use their internal memory up, and that is where SD cards are useful. They add-on to your personal device that can greatly boost the amount of media you can store at one time. You will not have to worry about having to delete important photos from your camera, or music from your smartphone.

With most SBCs, including Raspberry Pi, they run their OS from an SD Card. To shop Raspberry Pi micro SD cards preloaded with NOOBS, visit our sister site OKdo for all things Raspberry Pi and SBC.

What is SDUC/SDXC/SDHC?

  • SDUC stands for Secure Digital Ultra Capacity. This supports memory cards up to 128TB.
  • SDXC stands for Secure Digital eXtended Capacity. SDXC cards support up to 2TB.
  • SDHC stands for Secure Digital High Capacity. SDHC card refers to SD cards which have a higher storage capacity, usually over 4GB.

What is Speed Class?

Speed class is a standard developed by the SD association. Speed Class, UH Speed Class and Video Speed Class are given to indicate the minimum writing speed of a memory card. They include:

  • Speed Class - 2, 4, 6, 10
  • UH Speed Class - UHS-I, UHS-3
  • Video Speed Class - V6, V10, V30, V60, V90

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Description Price Card Format Capacity Industrial Speed Class Rating Nand Type Series Temperature Range X Speed Rating
RS Stock No. 124-9625
Mfr. Part No.TS16GSDHC10U1
BrandTranscend
£16.36
Each
Units
SDHC 16 GB - Class 10, UHS-1 U1 MLC - -25 → +85°C -
RS Stock No. 144-8091
Mfr. Part No.DS2A-16GI81W1B
BrandInnoDisk
£220.75
Each
Units
SDHC 16 GB Yes Class 10 SLC - -40 → +85°C -
RS Stock No. 124-9631
Mfr. Part No.TS256GSDU3
BrandTranscend
£197.95
Each
Units
SDXC 256 GB - Class 10, UHS-1 U3 MLC - -25 → +85°C -
RS Stock No. 144-8089
Mfr. Part No.DS2A-04GI81W1B
BrandInnoDisk
£66.21
Each
Units
SD 4 GB Yes Class 10 SLC - -40 → +85°C -
RS Stock No. 758-2578
Mfr. Part No.TS16GSDHC10
BrandTranscend
£9.27
Each
Units
SDHC 16 GB - Class 10 MLC - - -
RS Stock No. 124-9628
Mfr. Part No.TS128GSDXC10U1
BrandTranscend
£97.95
Each
Units
SDXC 128 GB - Class 10, UHS-1 U1 MLC - -25 → +85°C -
RS Stock No. 194-7449
Mfr. Part No.AF128GSD4-BBBIM
BrandATP
£71.29
Each
Units
SD 128 GB Yes 10 3D TLC S600Si -40 → +85°C -
RS Stock No. 187-1628
Mfr. Part No.TS32GSDC300S
BrandTranscend
£10.23
Each
Units
SDHC 32 GB - Class 10 TLC - -25 → +85°C -
RS Stock No. 187-1629
Mfr. Part No.TS128GSDC300S
BrandTranscend
£25.36
Each
Units
SDXC 128 GB - Class 10 TLC - -25 → +85°C -
RS Stock No. 173-9498
Mfr. Part No.TS8GSDHC100I
BrandTranscend
£67.65
Each
Units
SD 8 GB Yes Class 10 SLC - -40 → +85°C -
RS Stock No. 144-8023
Mfr. Part No.DESDC-08GY81BW3SC
BrandInnoDisk
£25.63
Each
Units
SD 8 GB Yes Class 10 MLC - -40 → +85°C -
RS Stock No. 187-1630
Mfr. Part No.TS256GSDC300S
BrandTranscend
£54.55
Each
Units
SDXC 256 GB - Class 10 TLC - -25 → +85°C -
RS Stock No. 193-2592
Mfr. Part No.240-075-1
BrandDigilent
£10.36
Each
Units
MicroSD 8 GB - - - - - -
RS Stock No. 183-9393
Mfr. Part No.AF8GSD3-WABXM
BrandATP
£13.96
Each
Units
SDHC 8 GB Yes Class 10, UHS-1 U1 MLC S600Sc -25 → +85°C -
RS Stock No. 206-9175
Mfr. Part No.AF16GSD4A-BBBIM
BrandATP
£38.95
Each
Units
SDHC 16 GB Yes Class 10, U3, UHS-I - S700Pi -40 ? +85°C -
RS Stock No. 206-9188
Mfr. Part No.AF32GSD4-BBBXM
BrandATP
£20.35
Each
Units
SDHC 8 GB Yes Class 10, U3, UHS-I - S600Si -40 ? +85°C -
RS Stock No. 187-1714
Mfr. Part No.TS128GSDXC10
BrandTranscend
£33.41
Each
Units
SDXC 128 GB - Class 10 - - -25 → +85°C -
RS Stock No. 183-9394
Mfr. Part No.AF16GSD3-WAEXM
BrandATP
£20.15
Each
Units
SDHC 16 GB Yes Class 10, UHS-1 U1 MLC S600Sc -25 → +85°C -
RS Stock No. 206-9176
Mfr. Part No.AF16GSD4A-BBBXM
BrandATP
£30.82
Each
Units
SDHC 16 GB Yes Class 10, U3, UHS-I - S700Sc -25 ? +85°C -
RS Stock No. 144-8025
Mfr. Part No.DESDC-32GY81BW3SC
BrandInnoDisk
£55.59
Each
Units
SDHC 32 GB Yes Class 10 MLC - -40 → +85°C -