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Small green circuit board with a microSD slot on one end and a full-size SD slot on the other

LORDWORLD

LORDWORLD TF Micro SD Male to SD Female Extender Adapter UHS-III UHS-2

SKU CH-JBR0-CNFBF

Extends a microSD card to full-size SD with UHS-III support reaching 321 MB/s tested at 250 MB/s

  • Extends SD cards for tight spaces with TF male-to-SD female connector
  • UHS-I full-speed transfers up to 104 MB/s and high-speed 52 MB/s
  • UHS-II and UHS-III support reaching 321 MB/s maximum throughput
  • Verified 250 MB/s real-world speed with 270 MB/s UHS-II cards
  • Designed for Raspberry Pi, ROCK Pi 4, GPS and industrial equipment

Micro SD to SD extender for UHS-II boards

This adapter converts a microSD card into a full-size SD form factor using a TF male to SD female connector. It targets developers using platforms such as ROCK Pi 4 or Raspberry Pi SCM boards where the card slot is recessed or hard to reach. The PCB design keeps the signal path short for high-speed operation. Buyers who need a right-angle or ribbon-cable extender will not find that here.

Sustained UHS-II throughput up to 250 MB/s

The board supports UHS-I at up to 104 MB/s and UHS-II or UHS-III at up to 321 MB/s rated bandwidth. In testing with a UHS-II card rated at 270 MB/s the adapter delivered 250 MB/s, showing minimal overhead under continuous load. UHS-I high-speed mode reaches 52 MB/s. Users requiring sustained write speeds above the tested figure should verify their card and host controller can maintain it.

Plug-and-play PCB with no drivers

Installation is a simple matter of inserting the microSD card into the male end and seating the female SD connector into the host slot. No software configuration is needed on Linux-based development boards. The exposed PCB has no mounting holes, so vibration-heavy equipment may need extra mechanical securing. Builders who need a shielded or ruggedised housing must add that themselves.

Highlights

  • Extends SD cards for tight spaces with TF male-to-SD female connector
  • UHS-I full-speed transfers up to 104 MB/s and high-speed 52 MB/s
  • UHS-II and UHS-III support reaching 321 MB/s maximum throughput
  • Verified 250 MB/s real-world speed with 270 MB/s UHS-II cards
  • Designed for Raspberry Pi, ROCK Pi 4, GPS and industrial equipment

Specifications

BrandLORDWORLD

Questions about this item

Does the adapter generate heat or draw extra power when a UHS-II card runs at 250 MB/s all day?

The passive PCB adds no active components, so it draws negligible power and produces no measurable heat beyond the card itself during sustained 250 MB/s transfers.

What host device and card combination are required for the adapter to function at UHS-III speeds?

A host with a UHS-III microSD slot and a UHS-III microSD card are both needed; the adapter simply extends the electrical connection without converting protocols.

Will a legacy UHS-I microSD card still work at its rated 104 MB/s when plugged into this extender?

Yes, the adapter is backward compatible and passes UHS-I signals unchanged, so a UHS-I card operates at up to 104 MB/s through the extender.

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