Date Code
Definition
A date code is a marking on a component that indicates when it was manufactured, typically encoding the year and week of production. It is part of the identifying and traceability information printed or stamped on a part.
Why it matters
Date codes serve three purposes in sourcing. They support traceability, they help assess shelf life for age- or moisture-sensitive parts, and they are a key check when screening for counterfeits. When buying obsolete parts through the secondary market, altered or implausible date codes are a warning sign of remarking, which is why buyers request and inspect them.
Related terms
- Lot Code: the companion code identifying the production batch.
- Counterfeit Electronic Component: the risk date-code checks help catch.
3E Technology gives you direct supplier contacts so you can request date-code and traceability details before buying.
Frequently Asked Questions
What is a date code on a component?+
A date code is a marking that indicates when a component was manufactured, usually encoding the year and week. It supports traceability, helps assess shelf life for moisture- or age-sensitive parts, and is one of the details checked when screening for counterfeits.
Why do date codes matter when buying obsolete parts?+
For obsolete parts bought on the secondary market, date codes help verify authenticity and age. Mismatched, altered, or implausible date codes are a red flag for remarked or counterfeit parts, so buyers request date-code information and, for critical parts, inspect the marking.
Related Resources
Lot Code
A lot code identifies the production batch a component came from. Here's how lot codes support traceability and quality control in sourcing.
Counterfeit Electronic Component
A counterfeit electronic component is a part misrepresented as to its origin or authenticity. Here's how counterfeits enter the supply chain and how to avoid them.
Independent Distributor (Broker)
An independent distributor or broker buys and sells components on the open market without manufacturer authorization. Here's the role they fill and how to vet them.
How to Source Obsolete Electronic Components: A Practical Guide
When authorized distributors run dry on an EOL part, here's the workflow for finding inventory, vetting suppliers, and avoiding counterfeits.
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