Quick answer
The MH340 / MH341 / MU341 and their T / P variants are members of TSC's MH-series industrial printers and generally use the same 300-dpi printhead family. In practice the printhead assemblies are interchangeable in most cases, but you must confirm the exact part number and resolution (dpi) before replacing, and follow installation/calibration steps to avoid issues
What these model names mean
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MH340, MH341
members of TSC's MH-series 4-inch industrial printers. They differ in options, firmware and feature bundles (screen type, connectivity, max width or speed options), but are built on the same mechanical platform.
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MU341
often shown in vendor listings as a closely related model or "module" variant; vendors list the same replacement printhead for MU341 as for MH340/MH341.
Suffixes:
T usually denotes thermal-transfer capability (thermal transfer + direct thermal), P / P variants indicate different control panels or "professional" configurations (touchscreen, extra memory, or industrial options). These suffixes change printer features but typically not the physical printhead family.
Printhead common specs and part numbers
Multiple suppliers list the same 300 dpi printhead assembly for MH340 / MH341 / MU341 / MH340T / MH341P / MH341T, often referenced by OEM part numbers such as PH-MH241-0005 or 98-0600022-01LF. That indicates the same physical heating element and connector is used across these MH-series variants at 300 dpi.
What can make them incompatible (things to check)
Wrong resolution (dpi)
installing a 203 or 600 dpi head into a 300 dpi printer or vice versa can cause scaling, firmware mismatch, and print quality problems. Always confirm the printhead dpi rating on the part and printer configuration.
Different part numbers
suppliers sometimes sell near-identical assemblies under different MPNs (minor bracket or connector changes). Match the OEM PH-/98- part number on your old head.
Firmware or sensor offsets
after replacement you may need to re-calibrate sensors, set head parameters in the printer menu, or update firmware to recognize the new head correctly.
OEM original vs compatible third-party heads
aftermarket heads can physically fit but may differ in durability or warranty terms. If uptime is critical, prefer OEM or a trusted compatible with a clear warranty.
Recommended replacement checklist (practical steps)
Record the existing head MPN and dpi (look for PH-MH241-0005, 98-0600022-01LF or the sticker on the head).
Order the exact MPN and dpi from a reputable supplier (OEM if budget allows).
Power down and follow TSC service instructions - avoid touching the heating element; use ESD precautions. Refer to the MH241/MH341 user manual for steps.
Recalibrate sensors and run a test print after install; confirm print width, density and scaling.
Keep old head as backup for quick swap if you need to revert (if the old head is still functional).
Conclusion
The MH340 / MH341 / MU341 and their MH340T / MH341P / MH341T variants belong to the same TSC MH family and share the same 300-dpi printhead family, which makes their heads interchangeable in practical service situations - but only if you verify the exact part number and dpi before swapping.
