Zebra ZT421 label printer Direct thermal / Thermal transfer 203 x 203 DPI 305 mm/sec Wired & Wireless Ethernet LAN Bluetooth

The Zebra ZT421 industrial label printer supports both direct thermal and thermal transfer printing, offering a maximum resolution of 203×203 DPI and print speeds up to 305 mm/s. It accepts media up to 168 mm wide and provides wired and wireless connectivity options, including Ethernet and Bluetooth. Built with an all-metal frame and bi-fold door, the ZT421 is designed for reliable high-volume labeling in warehousing, manufacturing and logistics while allowing future feature expansion through factory- or field-installable options.

Advantages

The ZT421 combines a durable all-metal construction with a 4.3-inch full-color touch display that shows color-coded status alerts for quick visibility. It offers flexible configuration via two open communication slots and multiple connectivity choices (USB, Serial, Ethernet, dual USB Host, Bluetooth). Tool-less print head and platen replacement and lighted, color-coded media paths simplify maintenance and media loading. Optional factory- or field-installable modules such as RFID and advanced media handling enable customization to changing business needs.

Suitable for

• High-volume label production in warehouses and distribution centers
• Manufacturing line and production tracking labels
• Logistics, shipping and parcel labeling
• Retail backroom labeling and inventory management
• Applications requiring RFID encoding (when option installed)

Key specifications

• Print technology: Direct thermal / thermal transfer
• Maximum resolution: 203 × 203 DPI
• Maximum print width: 168 mm
• Maximum print speed: 305 mm/s
• Connectivity: Ethernet, Serial, USB, dual USB Host, Bluetooth
• Weight: approx. 18.4 kg
• Housing: All-metal frame with bi-fold door
• Display: 4.3-inch full-color touch display

How to use

Install the printer on a stable surface and connect it to power and your network using Ethernet or wireless options as required. Load media and ribbon following the lighted, color-coded side-loading paths, then configure print settings (media type, print mode, resolution, and speed) via the 4.3-inch color touch display or through Zebra Print DNA utilities. For RFID or other optional modules, install factory- or field-installable kits according to the provided instructions. Replace the print head or platen roller without tools when needed to minimize downtime.

Recommendations

Use thermal transfer ribbon matched to your media type for durable, long-lasting labels; select direct thermal for short-term labels. Keep firmware updated and use Zebra’s Print DNA tools for integration, monitoring and remote management to maintain reliable operation in high-volume environments.