Can you recommend a passive RFID tag for use in circuit board manufacturing that is approximately 1 to 3 millimeters in size, can withstand 350 degrees Celsius and is waterproof?
I am unaware of any tags that meet all of your criteria. There are very few tags on the market that could withstand 350 degrees Celsius (662 degrees Fahrenheit), and those that could tend to be larger than you require because they have material to protect the tag from the heat. The closest tag I can recommend is Murata Manufacturing‘s Magicstrap, which was designed specifically for use on printed circuit boards. It measures 3.2 millimeters by 1.6 millimeters by 0.55 millimeter (0.13 inch by 0.06 inch by 0.2 inch) and can survive the plastic molding process, so it can be exposed to a temperatures of up to 150 degrees Celsius (302 degrees Fahrenheit) for two hours. However, I don’t know whether or not it is waterproof.
—Mark Roberti, Founder and Editor, RFID Journal
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