Vybronics offers a line of compact vibration motors, including part number VLV101040A . When ordering these parts, you may encounter one with a ‘J’ marking on its body, which is inconsistent with documentation for the part. Are these motors defective?
Vybronics has confirmed that this case was an accidental misprint. DigiKey’s misprinted stock is in the process of being replaced, and the manufacturer has confirmed that the parts are perfectly fine and usable, simply incorrectly marked. Should you encounter this misprinted stock, you may use it or not at your discretion without issues.