Zebra ZD421D Direct Thermal Printer 203dpi USB [ZD4A042-D0PM00EZ]

Zebra ZD421D Direct Thermal Desktop Label Printer 203dpi, up to 152mm/sec, USB, USB Host and Bluetooth Low Energy 5 [ZD4A042-D0PM00EZ].

The Zebra ZD421D Direct Thermal Printer (ZD4A042-D0PM00EZ) is a reliable 4-inch desktop label printer designed for shipping labels, barcode labels, inventory identification, retail, healthcare, warehouse and general business applications. With 203dpi resolution and print speeds of up to 152mm/sec (6 ips), it combines professional Zebra performance with a compact and easy-to-use desktop design.

This configuration includes USB 2.0, USB Host, Bluetooth Low Energy 5 (BTLE5) and a modular connectivity slot for compatible optional connectivity upgrades. As a direct thermal printer, the ZD421D prints directly onto heat-sensitive labels without requiring ink, toner or thermal-transfer ribbon.

Product Highlights
Zebra ZD421D 4-Inch Desktop Label Printer
Part Number: ZD4A042-D0PM00EZ
Direct Thermal Printing No Ribbon Required
Print Resolution: 203dpi / 8 dots per mm
Print Speed: Up to 152mm/sec (6 ips)
Maximum Print Width: 104mm / 4.09″
USB 2.0 + USB Host
Bluetooth Low Energy 5 (BTLE5)
Modular Connectivity Slot for Compatible Optional Upgrades
ZPL & EPL Printer Language Support
Ideal for Shipping, Barcode, Inventory & Warehouse Labels

Key Specifications

Direct Thermal Printing No Ink, Toner or Ribbon

The Zebra ZD421D uses direct thermal printing technology. Heat from the printhead creates the printed image directly on compatible heat-sensitive thermal media.

This means there are no ink cartridges, toner cartridges or thermal-transfer ribbons to replace, helping simplify everyday label printing and reduce consumable requirements.

Fast 203dpi Label Printing

The ZD4A042-D0PM00EZ features a 203dpi (8 dots/mm) printhead and can print at speeds of up to 152mm per second / 6 inches per second.

With a maximum print width of approximately 104mm (4.09″), it is ideal for many common 4-inch barcode, shipping and logistics label formats.

USB & USB Host Connectivity

This ZD421D configuration provides reliable wired desktop connectivity through:

• USB 2.0 for direct connection to a compatible computer or host system
• USB Host for compatible USB peripherals and devices

For businesses using the printer at a dedicated packing station, retail counter or workstation, USB provides a simple and dependable connection without requiring network configuration.

Bluetooth Low Energy 5 for Easy Printer Setup

The printer also includes Bluetooth Low Energy 5 (BTLE5), supporting convenient printer configuration and setup through compatible Zebra mobile applications.

Connectivity Note:
This specific ZD4A042-D0PM00EZ configuration does not include built-in Ethernet or Wi-Fi. The standard Bluetooth Low Energy connection is primarily intended for compatible Zebra printer setup functionality and should not be confused with optional full Bluetooth wireless printing configurations.

Modular Connectivity Slot

The ZD4A042-D0PM00EZ includes a modular connectivity slot, allowing compatible optional Zebra connectivity modules to be added where supported.

This provides additional flexibility for businesses whose connectivity requirements may change over time, without requiring the printer itself to be replaced.

Ideal for Shipping & Barcode Labels

The Zebra ZD421D is suitable for a wide variety of commercial label-printing applications, including:

• Shipping and courier labels
• Warehouse and dispatch labels
• Barcode labels
• Inventory and stock identification
• Asset identification
• Retail price and shelf labels
• Product identification labels
• Order fulfilment labels
• Receiving and logistics labels
• Healthcare and general business labelling

4-Inch Direct Thermal Media Support

The ZD421D supports direct thermal media up to approximately 108mm (4.25″) wide, with a maximum printable width of approximately 104mm (4.09″).

The printer accommodates media rolls up to approximately 127mm (5″) outside diameter, making it suitable for many standard desktop shipping and barcode label rolls.

ZPL & EPL Compatibility

The Zebra ZD421 platform supports widely used Zebra printer languages including ZPL, ZPL II and EPL.

This makes the ZD421D a strong replacement or upgrade option for businesses already using Zebra-based label templates, barcode software, warehouse systems and compatible shipping applications.

Easy Media Loading

Zebra’s OpenACCESS clamshell design provides convenient access to the media compartment, helping users replace label rolls quickly and minimise downtime.

The printer’s user interface features three control buttons and five status icons, providing clear visual feedback for everyday printer operation.

Zebra Print DNA

The ZD421 platform supports Zebra’s Print DNA software ecosystem, providing tools designed to simplify printer configuration, deployment, management and security.

Compatible Zebra software such as ZebraDesigner can also be used to create and print barcode, shipping and product labels.

Compact Desktop Design

The Direct Thermal ZD421D has a compact footprint suitable for busy workspaces:

• Length: Approx. 220.8mm
• Width: Approx. 177.5mm
• Height: Approx. 150.7mm
• Weight: Approx. 1.35kg

Its compact size makes it suitable for packing benches, warehouse workstations, retail counters, reception areas and office desktops.

Need Built-In Ethernet?

If your business requires the label printer to connect directly to a wired network, consider the Zebra ZD421D ZD4A042-D0PE00EZ with built-in 10/100 Ethernet.

The two configurations provide the same core ZD421D 203dpi direct thermal printing platform, but the ZD4A042-D0PE00EZ includes Ethernet as standard, while this ZD4A042-D0PM00EZ configuration provides a modular connectivity slot instead.

Why Choose the Zebra ZD421D?

• Professional Zebra 4-inch desktop label printer
• Fast printing up to 152mm/sec
• 203dpi barcode and text resolution
• No ink, toner or ribbon required
• USB and USB Host connectivity
• Bluetooth Low Energy 5 for convenient printer setup
• Modular connectivity slot for compatible optional upgrades
• ZPL and EPL compatibility
• Easy media loading
• Compact desktop footprint
• Ideal for shipping, warehouse, retail and barcode applications

What’s Included?

• 1 x Zebra ZD421D Direct Thermal Printer [ZD4A042-D0PM00EZ]
• Power Supply
• Applicable Power Cord
• Supplied Documentation / Quick Start Information

Please Note: Direct thermal labels are required for printing and are sold separately unless otherwise stated.

Frequently Asked Questions (FAQ)

Is ZD4A042-D0PM00EZ a direct thermal printer?
Yes. It is a direct thermal ZD421D configuration and therefore does not require a thermal-transfer ribbon.

What resolution does this Zebra ZD421D have?
This configuration has a 203dpi (8 dots/mm) print resolution.

How fast can it print?
The 203dpi ZD421D can print at speeds of up to approximately 152mm/sec or 6 inches per second.

Does ZD4A042-D0PM00EZ have USB?
Yes. It includes USB 2.0 and USB Host connectivity.

Does this model have Ethernet?
No. The ZD4A042-D0PM00EZ does not include built-in Ethernet. It has a modular connectivity slot for compatible optional connectivity upgrades. If built-in Ethernet is required, consider the ZD4A042-D0PE00EZ configuration.

Does this model have Wi-Fi?
No. Wi-Fi is not included as standard with this specific configuration.

Does it have Bluetooth?
The printer includes Bluetooth Low Energy 5 (BTLE5), which supports compatible Zebra mobile printer setup functionality. This should not be confused with optional full Bluetooth wireless printing configurations.

Can it print standard 4-inch shipping labels?
Yes. Its maximum print width of approximately 104mm makes it suitable for many common 4-inch shipping, courier and barcode label formats when compatible direct thermal media is used.

Does the printer require ink or toner?
No. The ZD421D prints using heat-sensitive direct thermal labels, so no ink or toner cartridges are required.

Customer Reviews:

Fast and reliable printer perfect for our small business. Store Owner

Excellent print clarity and easy Bluetooth pairing. Operations Supervisor

Last Updated: 7 October 2026