Brother TJ-6421TN — 6-inch industrial thermal transfer label printer, 203 dpi
6" / 168 mm203 dpi305 mm/sLAN · USB · RS-232C
The Brother TJ-6421TN is a 6-inch industrial label printer that prints by thermal transfer or direct thermal at 203 dpi and up to 305 mm/s (12 ips), built for warehouses, logistics hubs and manufacturing lines printing wide shipping, pallet and product labels all day.
It prints up to 168 mm wide on media from 50.8 to 172.7 mm, takes rolls up to 208 mm diameter on 1"–3" cores and ribbons up to 450 m, and has a 4.3-inch colour touchscreen. USB 2.0, USB Host, RS-232C and 10/100 Ethernet are standard, with optional Wi-Fi/Bluetooth and GPIO modules. FBPL-EZD emulates ZPL2, EPL2 and DPL, so it can replace many existing industrial printers without changing label templates.
Before you order: No ribbon or labels are included. Thermal transfer printing needs a wax, wax/resin or resin ribbon on a 1" core (max 450 m, max 81 mm diameter) matched to your label material.
What's in the Box
- TJ-6421TN printer
- AC power cord
- USB cable
- Documentation
What It Means in Practice
- Print 4×6" shipping labels and wider pallet labels at high speed in a single shift.
- Swap in for an older ZPL- or DPL-based printer without rewriting your labels in most cases.
- Configure and monitor it remotely over the network with Brother Printer Management Tool.
- BarTender Ultra Lite is included for designing labels.
What Will Not Work
- No ribbon or media in the box.
- Cutter, peeler/rewinder, Wi-Fi/Bluetooth and GPIO are optional extras; the cutter and peeler must be dealer-installed.
- 203 dpi is not ideal for very small 2D codes or tiny text — Brother offers a separate 300 dpi model.
- At 17.9 kg it needs a sturdy bench, not a desk shelf.
Key Features
Industrial speed
Up to 305 mm/s (12 ips) at 203 dpi.
Wide format
Prints up to 168 mm on media up to 172.7 mm.
Emulation
ZPL2, EPL2 and DPL via FBPL-EZD.
Touchscreen
4.3" colour display with six navigation keys.
Technical Specifications
| Identification |
| Part Number |
TJ6421TNZ1 |
| EAN / GTIN |
4977766841641 |
| Model |
TJ-6421TN |
| Brand |
Brother |
| Printing |
| Method |
Thermal transfer and direct thermal |
| Resolution |
203 dpi |
| Speed |
Up to 304.8 mm/s (12 ips) |
| Max print width |
168 mm |
| Print length |
10 mm to 14,732 mm |
| Media & ribbon |
| Media width |
50.8–172.7 mm |
| Roll diameter |
Up to 208 mm, core 38.1–76.2 mm |
| Ribbon |
Wax, wax/resin, resin; up to 450 m; 1" core; width 50.8–178 mm |
| Connectivity |
| Standard |
USB 2.0 (Type B), USB Host, RS-232C, 10/100 Ethernet |
| Optional |
Wi-Fi 802.11a/b/g/n + Bluetooth 4.2 (PA-WB-001), GPIO (PA-GP-003) |
| Memory |
256 MB RAM, 512 MB flash, microSD up to 32 GB |
| Software |
| Emulation |
FBPL-EZD (EPL2, ZPL2, DPL) |
| OS |
Windows 10/11, Windows Server 2016/2019/2022, macOS, Linux |
| Included |
BarTender Ultra Lite, Printer Management Tool |
| Physical |
| Display |
4.3" colour touchscreen |
| Dimensions |
357 × 510 × 313 mm (W × D × H) |
| Weight |
17.9 kg |
| Operating environment |
0–40°C, 25–85% RH |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
5-year return-to-base warranty as standard per Brother Europe — claims handled through Singular |
Frequently Asked Questions
Which ribbon do I need?
A ribbon on a 1" core up to 450 m, in wax, wax/resin or resin depending on your labels. Tell us the label material and we will match it.
Can it replace a Zebra printer?
In most cases, yes: it emulates ZPL2, so existing Zebra label formats usually print without changes. Send us a sample label file to test.
Can I add a cutter later?
Yes, the PA-CU-008 cutter is available, but it must be installed by a dealer.
Singular Expert Insight · Buyer's Guide
The TJ-6421TN is a proper industrial workhorse for wide labels, and its ZPL2/DPL emulation makes it an easy drop-in replacement. Connect it to your warehouse network with a patch lead from our
network cables range and budget for ribbons and labels from day one.
✓ Buy it if you print wide shipping or pallet labels in volume and want an industrial printer with ZPL emulation.
✕ Skip it if you print small, high-density labels (choose 300 dpi) or low volumes on a desk.
→ Also consider the 300 dpi version or the optional cutter/peeler modules.
Send us your label size, volume and current printer model and we will confirm settings, ribbon and media before you order.