What is Manufacturer Part Number (MPN)

MPNs (Manufacturer Part Numbers) are unique codes assigned by manufacturers to identify individual products or components. Each MPN refers to a specific item in the manufacturer’s catalog and helps distinguish it from similar products made by others. MPNs are commonly used in inventory systems, product catalogs, and ecommerce listings.

Examples

Format Example Notes
Alphanumeric HX-55R-MK3 Format and length vary by manufacturer
Numbers only 872349 Simpler formats are common for basic components
With dashes AB-123-XYZ Dashes often separate product line, model, and version
With letters only QRSXLM Letters may represent categories or series

Good to know

MPNs don’t follow one fixed format. Each manufacturer creates their own system for assigning these part numbers, so they can include letters, numbers, dashes, or a combination. One brand’s “A123-BX” might be entirely different from another’s “A123-BX”. That’s why MPNs should always be used alongside the brand or manufacturer name. This helps avoid confusion and ensures the right product is being referenced or listed.

Know more

Frequently Asked Questions

How do I find a product’s MPN?
The MPN is usually listed on the product packaging, technical datasheet, or directly on the item itself, especially in electronics, automotive parts, and industrial goods. You can also find it on the manufacturer’s website or in your product information system (PIM).
Is an MPN the same as a SKU or UPC?
Not quite. An MPN is assigned by the manufacturer, while a SKU is created internally by the retailer for inventory purposes. A UPC, on the other hand, is a globally standardized barcode used to identify products at the point of sale.
Do I always need to use an MPN in product listings?
If you’re selling in categories like electronics, auto parts, or hardware, yes. MPNs help with search accuracy, reduce product mismatches, and are often required by marketplaces like Google Shopping, Amazon, or eBay. Including the correct MPN improves discoverability and builds buyer trust.
What if a product doesn’t have an MPN?
Some generic or white-label products might not come with an MPN. In those cases, sellers sometimes create their own internal codes, but it’s best to clarify that no manufacturer part number is available, especially if you're listing the item online or submitting to a shopping feed.