


Adafruit SPI Non-Volatile FRAM Breakout - 4 Mbit / 512 KBytes - MB85RS4MT
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Adafruit SPI Non-Volatile FRAM Breakout - 4 Mbit / 512 KBytes - MB85RS4MTFRAM (Ferroelectric RAM) offers a breakthrough in non volatile memory combining fast write performance with extremely high endurance. This SPI FRAM breakout board features a 4 Mbit (512 KBytes) MB85RS4MT chip, capable of operating at up to 40 MHz SPI clock speeds. The board includes a built in 3. 3V logic level shifter and regulator, making it compatible with both 3V and 5V systems. Its low power consumption and instantaneous byte level access make it
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Product Reviews
★★★★★ 5
Sturdy, worked well
Holds it sturdy
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Reviewed in the United States on December 21, 2025
★★★★★ 5
Solid as described
Value for money and easy installation
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Reviewed in the United States on October 4, 2025
★★★★★ 5
Great for a gaming laptop!
Color: Black, Size: 1.37" without hook
Great product is you want to mount any size laptop under your desk. I used it for my Alienware gaming laptop and it's fantastic! The three points of contact hold the laptop securely, while allowing maximum airflow for the fans. The three "clamps" are rock solid and will definitely outlive the laptop. The installation was simple and easy, just need a drill.
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Reviewed in the United States on March 15, 2026
★★★★★ 5
under desk laptop system
Color: Black, Size: 1.37" without hook
Reclaimed real desk space with this one. The mount holds the laptop securely underneath without any vibration or creaking and the installation required no drilling — clamped cleanly to the desk edge. The ventilation spacing is generous enough that thermals stay reasonable even under load. Works with a solid range of laptop sizes and the adjustment mechanism is easy to use. If your laptop spends most of its time docked this is the cleanest way to get it out of the way.
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Reviewed in the United States on March 25, 2026
★★★★★ 4
Works great, but pads are peeling.
Color: Black, Size: 1.37" without hook
Works for what I needed, which was to mount my work laptop to the side of my desk. However, the rubber pads started peeling the first day. I tried clamping them down overnight, but they still ended up peeling up. They haven't come off completely and are still working, though. I may have to glue them down.
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Reviewed in the United States on April 14, 2026