Bourns supplies a range of handy passive and protection components for use in your projects, including their SMBJ18A TVS diode. Recently we’ve received some questions on product markings for this device; the datasheet indicates the marking code is ‘LT’, but products received bear additional marking codes beyond this ‘LT’ indicator. Is this correct?
“LT” is the product identifier marking for this device, as called out in the datasheet. Additional markings are lot codes used for traceability; these markings can be confirmed with the supplier if a process requirement demands it, but the formula for traceability markings is not made public as an anti-counterfeiting measure.