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RFID key transponder safe to use around magnets?

Discussion in 'Generation 1 Prius Discussion' started by primuspaul, Jan 3, 2016.

  1. primuspaul

    primuspaul Member

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    Can the RFID chip found inside the Prius transponder keys be damaged due to close proximity to an N52 magnet? I am talking about the small capsule used to disable the ignition interlock computer and allow the Prius to start. I read about RFID chips in general and saw that they apparently can only be destroyed due to physical destruction, high voltage, or microwaves, but I wanted to make sure they are invulnerable to very close proximity (less than a mm) to powerful magnets, like N52.
     
  2. bisco

    bisco cookie crumbler

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    probably not, but i have no idea really.
     
  3. primuspaul

    primuspaul Member

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    The chip was accidentally exposed to an N52 magnet for a few seconds, but it still works. Based on that and my reading, I suspect the chip cannot be damaged in such a manner.

    Additional technical experience is welcome.
     
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    If you had a non-magnetic material ring, say aluminum, and passing the hand over the magnet fast enough to feel some heat, there might be a risk. If you'll provide the magnetic field strength, Maxwells equations can calculate the expected induced voltage and current. But back of the envelope, you'd probably have to us a sling-shot or air-gun to move it through the magnetic field enough to even slightly risk harm.

    Go with confidence and watch what you have in your pockets.

    Bob Wilson