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Brand: Zebra Technologies
Zebra ZD421 Desktop Thermal Transfer Label Printer
Description
The Zebra ZD421 is a compact desktop printer for offices, stores, laboratories and dispatch desks that print barcode labels, tags and receipts. It prints direct thermal or thermal transfer, with ribbon either on a roll or in a cartridge, and supports ZPL II and EPL2 for compatibility with existing Zebra label formats.
Desktop labelling with industrial-grade software support
Not every labelling job needs an industrial printer. Stores bin labels, sample and test-tube labels, document-control tags, shipping labels and receipts are typically printed in modest volumes, and the ZD421 provides OpenACCESS media loading, a head-up sensor, a multi-position transmissive and full-width reflective sensor, a fan-fold media slot and support for rolls up to 5 in. (127 mm) outside diameter. Link-OS, Print Touch and a Bluetooth Low Energy set-up app (Android and iOS) are included.
Standard connectivity is USB 2.0 and USB host; Ethernet, serial and wireless (802.11ac with Bluetooth 4.1, MFi certified) are field-installable options. Healthcare models add a white disinfectant-ready housing and an IEC 60601-1 certified supply.
Technical specifications
| Parameter | Specification |
|---|---|
| Print methods | Direct thermal and thermal transfer (ribbon roll or ribbon cartridge) |
| Resolution | 203 dpi (8 dots/mm) standard; 300 dpi (12 dots/mm) optional |
| Maximum print width | 203 dpi: 4.09 in. (104 mm); 300 dpi: 4.27 in. (108 mm) |
| Print speed | 203 dpi: 2 to 6 in./s (51 to 152 mm/s); 300 dpi: 2 to 4 in./s (51 to 102 mm/s) |
| Maximum print length | 39 in. (991 mm) |
| Media width | ZD421t 0.585 to 4.41 in. (15 to 112 mm); ZD421c 0.585 to 4.65 in. (15 to 118 mm); ZD421d 0.585 to 4.25 in. (15 to 108 mm) |
| Label length | Minimum 0.25 in. (6.4 mm) tear; 0.5 in. (12.7 mm) with cutter or peeler; maximum 39 in. (991 mm) |
| Media thickness | 0.003 in. (0.08 mm) to 0.0075 in. (0.1905 mm) |
| Maximum roll outer diameter | 5.00 in. (127 mm); core adapters for 1.5, 2 and 3 in. cores |
| Ribbon | 300 m roll or 74 m roll; 74 m cartridge; width 33.8 to 109.2 mm (roll) |
| Memory | 256 MB SDRAM; 512 MB Flash |
| Standard interfaces | USB 2.0, USB host, Bluetooth Low Energy for set-up |
| Options | Field-installable cutter and dispenser (peeler), 10/100 Ethernet, RS-232, 802.11ac Wi-Fi with Bluetooth 4.1, ZKDU, ZD-Series battery 2750 mAh, mounting plate |
| Languages | ZPL II, EPL2; ZBI 2.0 and Set-Get-Do commands |
| Energy and manufacturer warranty | ENERGY STAR certified, Energy Efficiency Level VI; two-year standard warranty |
Selecting between ZD421 variants
The model suffix describes the print method and media: ZD421t is thermal transfer, ZD421d is direct thermal and ZD421c is the ribbon-cartridge model with a wider media range. Pick the ZD421d where labels do not need to resist heat, abrasion or chemicals, and thermal transfer with a matching ribbon where they do. Cutting through label and liner is not supported by the field-installable cutter, which is limited to continuous paper, linered label and tag stock up to 0.0075 in. thick.
Choosing the ZD421 and ordering
The ZD421 is the base desktop model. The ZD621 adds Ethernet and serial as standard, up to 8 in./s and an optional colour touch display. For heavier or 24-hour duty, move to the industrial ZT series. Confirm print method, resolution, interface option, cutter or peeler, battery, healthcare version and ribbon or media before ordering. Related items: industrial automation accessories.
Documents and quotation
The Zebra ZD421 specification sheet (manufacturer PDF) is attached to this page. Send your label type, volume and interface need for a quotation from Seven Star LLC, an independent supplier in Muscat.
Datasheets & Documents
- Datasheet Zebra ZD421 Printer Specifications (manufacturer PDF) Download
Reviews (0)
About brand
Zebra Technologies is an American maker of barcode printers, mobile computers, scanners and RFID equipment. It was founded in 1969 in Chicago as Data Specialties by Ed Kaplan and Gerhard Cless and took the Zebra name in 1986. Zebra is headquartered in Lincolnshire, Illinois, is listed on Nasdaq, and added Motorola Solutions' enterprise business in 2014.
Seven Star LLC is an independent supplier in Muscat. We list Zebra label printers for warehouses, production lines and laboratories in Oman and the GCC.
Zebra Technologies company profile
| Founded | 1969, Chicago, Illinois, USA, as Data Specialties |
|---|---|
| Founders | Ed Kaplan and Gerhard Cless |
| Renamed | Zebra Technologies, 1986 |
| Headquarters | Lincolnshire, Illinois |
| Listing | Nasdaq (ZBRA) |
| Product families | ZT industrial and ZD desktop label printers, TC and MC mobile computers, DS and LI barcode scanners, RFID readers and tags, rugged tablets |
Milestones
- 1969: Data Specialties is founded in Chicago.
- 1986: The company becomes Zebra Technologies.
- 2014: Zebra acquires Motorola Solutions' enterprise business.
Zebra product series
Industrial printers include the entry ZT111, the mid-range ZT231, the ZT411 and the 6-inch ZT421, the heavy-duty ZT510 and the high-performance ZT610 and 6-inch ZT620. The ZE511 print engine is designed for label applicators. Desktop models include the ZD421 thermal transfer printer and the ZD621 with Ethernet and serial interfaces.
The printers use ZPL programming and the Link-OS operating system, with resolutions up to 600 dpi on selected models and RFID encoding available on some.
Where Zebra printers are used
Shipping and pallet labels, product and asset labels, warehouse location and bin labels, laboratory sample labels and automatic print-and-apply on packaging lines.
Zebra Technologies products we list
Ordering Zebra printers: what we need
Send the model, print width and resolution, label size and media type, print volume, ribbon type, interface (Ethernet, Wi-Fi, serial or USB) and any cutter, peeler, rewinder or RFID requirement.
Facts checked against Zebra's corporate history and filings, October 2026.
Browse Zebra Technologies products by category: Automation Accessories.
FAQ
Questions about the Zebra ZD421 Desktop Thermal Transfer Label Printer
Answers from our engineering team on installation, compatibility and integration.
01What print widths does the ZD421 have?
4.09 in. (104 mm) at 203 dpi and 4.27 in. (108 mm) at 300 dpi.
02How fast does it print?
Up to 6 in./s at 203 dpi and 4 in./s at 300 dpi.
03Does it use ribbon cartridges?
Yes, the cartridge model uses a 74 m ribbon cartridge; roll ribbons of 74 m and 300 m are also listed.
04What interfaces are standard?
USB 2.0 and USB host; Ethernet, serial and wireless are field-installable options.
05Is a healthcare version available?
Yes, healthcare models add a white disinfectant-ready housing and an IEC 60601-1 certified power supply.
Reviews
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