Reading Date Codes On Panasonic Relays
Reading Date Codes
Date codes, or lot numbers, are used in manufacturing to identify when a component was made. It can be used for production quality control, as well as tracing purposes in the factory. Panasonic uses three different code formats to identify the date on a Relay:
- Three digit code: The first digits represent the year, and the remaining two digits represent the week number in a calendar year. Example: 645 means week 45 of year 2006.
- Four digit code: The first two digits represent the year, and the remaining two digits represent the week number in a calendar year. Example: 0451 means week 51 of year 2004.
- Five digit code: The first digit represents the year. The second and third digits represent the month, and the remaining two digits represent the day. Example: 41201 means December 1st, 2004.
For relays manufactured after June of 2005, the date code nomenclature will not have the "NAiS" logo. Instead, "M" will be used as shown in the TK1-5V relay above.