
Zebra ZM400 / RZ400 203dpi Genuine OEM Thermal Printhead
Description
The Zebra ZM400 / RZ400 203dpi Genuine OEM Thermal Printhead, part number 79800M, is an original Zebra replacement printhead designed for compatible Zebra ZM400 industrial barcode printers and Zebra RZ400 RFID printer/encoders operating at 203 dpi resolution. With a native resolution of 203 dots per inch, equivalent to approximately 8 dots per millimetre, this genuine Zebra printhead is engineered to produce sharp text, clearly defined graphics, accurate barcode elements and consistently readable labels for demanding commercial and industrial environments. The supported 203dpi printer platform provides a maximum print width of approximately 104 mm or 4.09 inches and supports printing speeds up to approximately 254 mm per second or 10 inches per second. Compatible ZM400 and RZ400 configurations support both Thermal Transfer and Direct Thermal printing, allowing the printer to work with thermal-transfer ribbon and appropriate label stock or directly with heat-sensitive direct-thermal media. The RZ400 additionally integrates RFID encoding functionality at the printer level, while the printhead remains responsible for producing the visible printed information on the RFID label or tag. As a Genuine OEM Zebra replacement component, part number 79800M is designed to match the electrical, thermal and mechanical requirements of the supported printer platform. Replacing a worn or damaged printhead can restore print quality when labels show persistent vertical white lines, missing dots, incomplete barcode elements, faded sections or uneven print density after normal cleaning and troubleshooting. Thermal printheads are precision wear components, and their service life depends on printing volume, print darkness, speed, media quality, ribbon quality, platen roller condition, printhead pressure, cleanliness and the operating environment. Customers should verify the exact printer model, 203dpi resolution and existing printhead part number before ordering. Professional installation is recommended for best reliability and to reduce the risk of electrostatic, alignment or physical damage during replacement.
Key Features
- 100% Genuine Zebra OEM thermal printhead
- Official Zebra part number 79800M
- Designed for compatible Zebra ZM400 203dpi printers
- Compatible with supported Zebra RZ400 203dpi RFID printer/encoders
- 203 dpi native print resolution
- 8 dots per millimetre print density
- Approximately 0.125 mm thermal dot size
- Supports Thermal Transfer printing
- Supports Direct Thermal printing
- Supports approximately 104 mm / 4.09 inch maximum print width
- Supports printer speeds up to approximately 10 ips / 254 mm/s
- Produces sharp text and clearly defined barcode elements
- Suitable for 1D and 2D barcode applications
- Suitable for high-volume industrial label printing
- Suitable for RFID smart-label printing when installed in a compatible RZ400 printer
- Helps restore print quality when replacing a worn or damaged printhead
- Original Zebra replacement component
- Brand new
- Not refurbished
- Not remanufactured
- Professional installation recommended



