Specialized printers
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Zebra ZD421 Series label printers
Typical applications
Max Print Width
104 mm (4.09 in) 
Media Inner Core Diameter
12.7 mm (0.5 in), with adapters for 25.4 mm (1 in), 38.1 mm (1.5 in), 50.8 mm (2 in) and 76.2 mm (3 in) cores 
Maximum Media Roll Outer Diameter
127 mm (5 in) 
Max Print Speed
Up to 6 ips (152 mm/s) at 203 dpi; up to 4 ips (102 mm/s) at 300 dpi 
Print Technology
Direct thermal and thermal transfer printing 
Resolution Options
203 dpi and 300 dpi 
Memory Size
256 MB DDR3 SDRAM, 512 MB Flash memory 
Standard Connectivity
USB 2.0, USB Host, Bluetooth Low Energy (BLE), NFC Print Touch™ 
Optional Connectivity
Ethernet, RS-232 Serial, Wi-Fi 802.11ac/802.11ax, Bluetooth 4.1/5.3 
About
At its core, the ZD421 features a powerful, modern architecture that significantly enhances performance and processing capabilities. Compared to previous models, it offers substantially more computing power, allowing it to handle multiple tasks simultaneously while maintaining speed and reliability. This future-ready design ensures that the printer can adapt to new technologies, applications, and security requirements, making it a smart long-term investment for growing businesses. 
The ZD421 delivers exceptional print quality and versatility across a wide range of applications. Supporting both direct thermal and thermal transfer printing, it produces clear, high-resolution labels, barcodes, and graphics with consistent accuracy. Its flexible media handling, movable sensors, and support for various label formats allow it to meet diverse operational needs, from product labeling to asset tracking and compliance marking. 
Ease of use is a key advantage of the ZD421. The printer features an intuitive user interface with multiple LED indicators and simple controls that provide real-time status visibility. Enhanced media handling, color-coded touchpoints, and innovative ribbon cartridge options make loading and maintenance fast and error-free, reducing training requirements and minimizing downtime. These design improvements ensure smooth daily operation even in busy work environments. 
Connectivity and scalability further strengthen the ZD421’s value. With standard USB and USB Host interfaces and optional Ethernet, Wi-Fi, and Bluetooth connectivity, it integrates easily into existing IT infrastructures. Powered by Zebra’s Link-OS and Print DNA software suite, the printer enables remote management, enhanced security, and simplified deployment. Combined with field-upgradeable features and broad compatibility with existing systems, the ZD421 is a versatile and future-proof desktop printing solution designed to grow with your business. 
Modifications
Choose from 44 different configurations to find the perfect match for your requirements.
Accessories
Expand your device capabilities with original accessories and peripherals.
Other accessories (38)
Printer sensors (7)
Printheads (8)
Mainboards (3)
Network adapters (1)
RS232 (1)
Wi-Fi adapters (3)
Platen rollers (5)
Label cutters (5)
Battery chargers (2)
Batteries (1)
Stands/mounts (2)
Power supplies (3)
Power cables (4)
Service Options
Enhance your equipment reliability with our flexible service and support packages.
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