TSC ML340 vs MA3400 Printhead Compatibility Guide

When replacing a thermal printhead for a TSC label printer, many buyers find that TSC ML340 printhead and TSC MA3400 printhead are often listed together in the aftermarket. This raises a practical question: Are they the same printhead, and can they be used interchangeably?

From a professional printhead replacement perspective, the answer is: in many aftermarket listings, the TSC ML340 and MA3400 printheads are treated as compatible 300dpi replacement printheads, but users should verify the exact part number and mechanical structure before installation.

TSC's ML Series product information shows that the ML341P / ML340-class model is a 300 dpi, direct thermal / thermal transfer 4-inch compact industrial printer. TSC's ML240 user manual also states that ML340 / ML340P models provide 300 dpi resolution at up to 5 inches per second.

The main reason is that printer model names and spare part names are not always presented consistently across regions, distributors, and aftermarket suppliers.

For example, TSC's official ML Series page currently highlights newer ML241P / ML341P naming, while replacement-part suppliers may still use older or regional names such as ML340, ML340P, MA3400, or MA3400P. TSC's downloads page also lists ML340, ML340P, and ML341P among supported resources, showing that these model names may coexist across product generations and support documents.

In the parts market, several sellers group MA3400 / MA3400P / ML340 together under the same 300dpi printhead replacement listing. This suggests practical interchangeability in many cases, but it should still be verified before bulk purchasing.