Specification Sheet
Table Of Contents
- Optional Features
 - Accessories
 - ZebraLink™ Solutions
 - Zebra® GX420d™, GX420t™ and GX430t™ PRINTER SPECIFICATIONS
 - Printing Specifications
 - Ribbon Specifications
 - Media Specifications
 - Calibration Procedure
 - ZPL Programming Language (ZPL/ZPL II)
 - ZPL Font Specifications 203 dpi (8 dots/mm)
 - 300 dpi (12 dots/mm), GX430t
 - ZPL Barcode Symbologies
 - EPL Programming Language (EPL2)
 - EPL Font Specifications
 - 203 dpi (8 dots/mm)
 - 300 dpi (12 dots/mm)
 - EPL Barcodes
 - Communications Specifications
 - Electrical Specifications
 - Agency Approvals
 - Physical Specifications (no options installed)
 - Environmental Specifications
 - Preventative Maintenance
 
333 
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 
3 
•  Max Roll Diameter: 5.00" (127 mm) 
•  Media Thickness: 0.003" (0.08 mm) - 0.0075" 
(0.19 mm) 
•  Media Sensing: fixed reflective and transmissive gap, 
black line and notch 
•  Media Types: Roll-fed or fan-fold, die cut or continuous 
direct thermal labels with or without black mark, tag 
stock, continuous receipt paper and wristbands 
•  Dispenser peeler (optional) may not work with all media 
types and should be tested for media compatibility 
Minimum Length 
Model 
Printing Mode 
0.38" (9.7 mm) 
GX420d 
Direct thermal 
0.38" (9.7 mm) 
GX420t & GX430t 
Thermal transfer 
0.50" (12.7 mm) 
GX420t & GX430t 
Direct thermal 
Calibration Procedure 
•  The GX420 and GX430 are equipped with a standard 
auto-calibration feature that can be set to initiate 
automatically during start-up of the printer - utilizing two 
to four labels to calibrate for efficient operation and less 
waste. The printer will also save the new settings in 
memory until the next calibration is performed. 
•  A manual calibration procedure can also be performed, 
if required. Consult your User’s Guide for more details 
on the specific manual calibration steps. 
ZPL Programming Language (ZPL/ZPL II) 
•  Communicates in printable ASCII characters 
•  Compatible with mainframe, mini, and PC hosts 
•  Downloadable objects include graphics and bitmap 
fonts, label templates and formats 
•  Automatic memory allocation for format while printing 
•  Automatic serialization of fields 
•  Format inversion (white on black) 
•  Mirror-image printing 
•  Four position field rotation (0º, 90º, 180º, 270º) 
•  Slew command 
•  Programmable label quantities with print, pause 
•  Status messages to host upon request 
ZPL Font Specifications  
203 dpi (8 dots/mm)  
Font 
Matrix 
(in dots) 
(H x W) 
Type* 
Minimum Char. 
Size (H x W) 
Maximum 
C.P.I. 
A 
9 x 5 
U-L-D 
.044" x .030" 
33.3 
B 
11 x 7 
U 
.054" x .044" 
22.7 
C,D 
18 x 10 
U-L-D 
.089" x .059" 
16.9 
E 
28 x 15 
OCR-B 
.138" x .098" 
10.2 
F 
26 x 13 
U-L-D 
.128" x .079" 
12.7 
G 
60 x 40 
U-L-D 
.295" x .236" 
4.2 
H 
21 x 13 
OCR-A 
.103" x .093" 
10.8 
GS 
24 x 24 
SYMBOL 
.118" x .118" 
8.5 
P-V 
U-L-D 
Backward compatible w/ S-300 
Ø 
15 x 12 
U-L-D 
Scalable (Smooth) Font 
300 dpi (12 dots/mm), GX430t 
Font 
Matrix 
(in dots)  
(H x W) 
Type* 
Minimum 
Char. 
Size (H x W) 
Maximum 
C.P.I. 
A 
9 x 5 
U-L-D 
.030" x .020" 
50.8 
B 
11 x 7 
U 
.037" x .030" 
33.8 
C,D 
18 x 10 
U-L-D 
.060" x .040" 
25.4 
E 
41 x 20 
OCR-B 
.138" x .085" 
11.5 
F 
26 x 13 
U-L-D 
.085" x .053" 
19.06 
G 
60 x 40 
U-L-D 
.200" x .160" 
6.36 
H 
30 x 19 
OCR-A 
.100" x .098" 
10.02 
GS 
24 x 24 
SYMBOL 
.80" x .80" 
12.7 
P-V 
U-L-D 
Ø 
15 x 12 
U-L-D 
Scalable (Smooth) Font 
*U = upper case, L = lower case, D = descenders 
•  Character Fonts: Standard bitmapped Zebra fonts: A, 
B, C, D, E (OCR-B), F, G, H, (OCR-A), GS, P, Q, R, S, 
T, U, V & Ø Smooth font (CG Triumvirate
™
 Bold 
Condensed). 
•  Supports user-defined fonts and graphics – including 
custom logos 





