| Manufacturer | Brother |
| Model | TJ4121TNW |
| Product Type | Industrial Thermal Label Printer |
| Printing Technology | Direct Thermal / Thermal Transfer |
| Print Resolution | 300 dpi |
| Maximum Print Speed | 7 inches per second |
| Form Factor | Desktop Industrial Printer |
| Color Capability | Monochrome |
| Power Requirements | 100 - 240VAC, 50/60Hz |
| Warranty | 2 Years Premier Warranty |
Brother TJ4121TNW 300dpi Thermal Label Printer with LAN/USB

Key Benefits
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- Offers excellent print quality and throughput with 300 dpi resolution and 7 ips speed combination
- Flexible integration with various interfaces ensures compatibility with modern and legacy systems
- Peace of mind and ROI backed by a standard 2-year Premier Warranty from Brother
Product Overview
The Brother TJ4121TNW is a 300 dpi industrial thermal label printer designed for robust commercial and manufacturing environments. It delivers fast 7 ips print speed, sharp resolution, and includes versatile interfaces such as WLAN, LAN, USB, and Serial. A color touch panel enhances usability, while compact dimensions optimize space usage. TAA compliance and a 2-year Premier Warranty round out this reliable printing solution, ensuring high performance and long-term ROI in high-volume workflows.
Specifications
Product Overview
Wireless Features
| Wi-Fi Standards | 802.11a/b/g/n/ac |
| Wireless Security | WEP, WPA/WPA2-PSK (AES/TKIP), LEAP, EAP-FAST, PEAPv0, PEAPv1, EAP-TLS, EAP-TTLS |
| Wireless Frequency Band | 2.4 GHz / 5 GHz |
| Antenna | Internal Wi-Fi Antenna |
Compliance & Origin
| Country of Origin | Taiwan |
| TAA Compliant | Yes |
| Certifications | UL, cUL, CE, FCC Class B, RoHS |
Advanced Security Features
| Network Security Protocols | SSL, TLS, SNMPv3, IPsec |
| User Authentication | 802.1x Authentication |
| Access Control | MAC Address Filtering |
| Data Protection | Secure Print over SSL |
Interfaces
| USB Interface | USB 2.0 Type B |
| USB Host | USB Host (Type A) |
| Ethernet | 10/100BASE-TX LAN |
| Serial Port | RS-232C |
| Wireless LAN | 802.11a/b/g/n/ac |
| Supported Protocols | IPv4/IPv6, DHCP, FTP, HTTP, SNMP, LPR, BOOTP, TELNET, TCP/UDP |
Physical & Environmental
| Width | 9.76 inches (248 mm) |
| Depth | 17.17 inches (436 mm) |
| Height | 10.79 inches (274 mm) |
| Weight | Approximately 18.2 lbs (8.25 kg) |
| Operating Temperature | 41°F to 104°F (5°C to 40°C) |
| Storage Temperature | -4°F to 140°F (-20°C to 60°C) |
| Operating Humidity | 25% to 85% RH (non-condensing) |
| Storage Humidity | 10% to 90% RH (non-condensing) |
| Display Type | 3.5" Color Touch Panel |
Cloud Management & Licensing
| Remote Management Capability | Yes—via Brother Web-Based Management |
| Included Software | Brother Printer Management Tool, BarTender UltraLite |
| Firmware Update Options | Over network or USB |