Zebra® ZD421 Direct Thermal Label Printer

As of: Friday, October 31, 2025

Standard Features

Auto sense EPLZ or ZPL
Tear bar

Options

RS-232 (DB-9F)
Peeler mechanism
Models available with Ethernet

Efficient Direct Thermal Label Printer

The Zebra ZD421 Series is a thermal label printer with a print speed of 6 inches per second and print width of 4.09 inches.

Zebra ZD421 Series Specifications

Print Speed:
6 ips

Print Width:
4.09 in (104 mm)

Paper Width:
0.75 to 4.25 in (19 × 108 mm)

Paper Thickness:
0.003 to 0.0075 in (0.08 × 0.19 mm)

Paper Diameter:
5 in (127 mm)

Paper Roll Shaft:
0.5 and 1.0 in (13 × 25 mm) standard

Resolution:
203 dpi/8 dots per mm

Memory:
512 MB flash, 128 MB SDRAM

Ribbon Outside Diameter:
2.6 in

Ribbon Standard Length:
984 ft (300 m)

Ribbon Ratio:
1:4 media to ribbon

Ribbon Width:
0.585 to 4.65 in

Ribbon Core Inner Diameter:
1 in

Interface:
USB 2.0 host
Ethernet TCP/IP
Optional: RS-232 serial (DB-9F)

Temperature:
Operating: 40 °F to 105 °F (4 °C to 41 °C)
Storage: -40 °F to 140 °F (-40 ° C to 60 °C)

Dimensions:
(L × W × H)
ZD421: 8.69 × 6.98 × 5.93 in
ZD421T: 10.5 × 8.0 × 7.5 in

Warranty:
One-year limited

Zebra ZD421 Bar Code Symbologies:

Barcode ratios: 2:1 (non-rotated) and 3:1 Linear bar codes; Codabar, Code 11 (ZPL), Code 128, Code 39, Code 93, EAN-13, EAN-8, EAN-14 (ZPL), German Post Code (EPL), Industrial 2-of-5 (ZPL), Interleaved 2-of-5, Japanese Postnet (EPL), ISBT-128 (ZPL), Logmars (ZPL), MSI, Plessey, Postnet, GS1 DataBar (RSS-14), Standard 2-of-5 (ZPL), UCC/EAN-128 (EPL), UPC and EAN 2 or 5 digit extensions (ZPL), UPCA, UPC-A and UPC-E with EAN 2 or 5 digit extensions, UPC-E and GS1 DataBar (formerly RSS) Two-dimensional: Codablock (ZPL), Code 49 (ZPL), Data Matrix, MaxiCode, QR Code, MicroPDF417, Aztec For EPL and ZPL except where noted

Parts

Part #	Description
Direct Thermal
212409	Printer,ZD421 Zebra Direct Thermal, 4IN Wide, 203DPI, USB Host, 100-240VAC w/US Power Cord
212410	Printer,ZD421 Zebra, Direct Thermal, 4in Wide, 203DPI, USB Host, 100-240VAC With US Power Cord, LAN 10/100 Ethernet Connectivity
Thermal Transfer
212406	Printer,ZD421T Zebra Thermal Transfer, 4IN Wide, 203DPI, USB Host, 100-240VAC with US Power Cord
212411	Printer,ZD421 Zebra, Thermal Transfer, 4in Wide, 203DPI, USB Host, 100-240VAC With Us Power Cord, LAN 10/100 Ethernet Connectivity

Options

Part #	Description

213390	Printer OPT,Peeler ZD421T Front Mount, Passive Peel Option Field-Installable
213356	Printer OPT,Peeler ZD421D Front Mount, Passive Peel Option Field-Installable
212815	Printer OPT, RS-232 ZD411 and ZD421 Series. Field Installable. Requires DB9 cable 41276 for RLWS indicators
41276	Cable Assy,DB9M To Blunt Male DB9 to blunt end cable 5 Feet PINOUT: Black Pin-5, Red Pin-3, Green Pin-2
Label Stock/Ribbon
192736	Printer OPT, Ribbon Core Adapter, ZD420T. Used to Accept 1 inch diameter ribbon cores. Set of two
192724	Ribbon, 2000 Wax, ZD420T 1 inch core 2.52 inches wide x 984 feet long
192725	Ribbon, 2000 Wax, ZD420T 1 inch core 3.31 inches wide x 984 feet long
192726	Ribbon, 2000 Wax, ZD420T 1 inch core 4.33 inches wide x 984 feet long
192727	Ribbon, 5555 Wax/Resin ZD420T 1 inch core 2.52 inches wide x 984 feet long
192728	Ribbon, 5555 Wax/Resin ZD420T 1 inch core 3.31 inches wide x 984 feet long
192729	Ribbon, 5555 Wax/Resin ZD420T 1 inch core 4.33 inches wide x 984 feet long
192730	Ribbon, 5095 Resin ZD420T 1 inch core 2.52 inches wide x 984 feet long
192731	Ribbon, 5095 Resin ZD420T 1 inch core 3.31 inches wide x 984 feet long
192732	Ribbon, 5095 Resin ZD420T 1 inch core 4.33 inches wide x 984 feet long
207358	Ribbon,Thermal Transfer 2.25IN, 243FT, Wax, 1/2IN Core