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Citizen cl-s521ii direct thermal label printer | 203 dpi | USB & serial
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Description
Item No.
1abf06cc-4e98-4dc1-afe0-2c22651d6251
Citizen CL-S521II Direct Thermal Label Printer
203 dpi | Direct Thermal | USB & Serial | 4-inch desktop label printer
The Citizen CLS521IINEBXX is a 4-inch direct thermal desktop label printer designed for barcode, shipping, retail, logistics and production label workflows. With 203 dpi resolution, print speeds up to 150 mm/s and dual USB plus serial connectivity, it is a practical choice for businesses that need reliable label printing with a durable desktop design.
Key Features
Direct
Attributes
Details
Citizen CL-S521II Direct Thermal Label Printer
203 dpi | Direct Thermal | USB & Serial | 4-inch desktop label printer
The Citizen CLS521IINEBXX is a 4-inch direct thermal desktop label printer designed for barcode, shipping, retail, logistics and production label workflows. With 203 dpi resolution, print speeds up to 150 mm/s and dual USB plus serial connectivity, it is a practical choice for businesses that need reliable label printing with a durable desktop design.
Key Features
Direct thermal simplicity
Prints on compatible direct thermal labels without ribbons, making it suitable for shipping labels, barcode labels, receipts and short-life identification labels.
Durable desktop construction
Citizen’s Hi-Lift metal mechanism and Hi-Open case design help make media loading easier while keeping the printer footprint compact.
USB and serial connectivity
Connect through USB 2.0 for modern workstation use or RS-232C serial for compatible business systems and legacy label workflows.
Large media capacity
Supports media widths up to 118 mm and large rolls up to 200 mm outside diameter, helping reduce roll changes in busy label stations.
Technical Specifications
| Manufacturer | Citizen |
| Model | CL-S521II |
| Manufacturer Part Number | CLS521IINEBXX |
| EAN | 5060198390739 |
| Print Technology | Direct Thermal |
| Print Resolution | 203 dpi |
| Maximum Print Speed | Up to 150 mm/s / 6 ips |
| Maximum Print Width | 104 mm / 4" |
| Media Width | 12.5–118 mm |
| Media Thickness | 63.5–254 µm |
| Roll Size | Up to 200 mm outside diameter |
| Connectivity | USB 2.0, Serial RS-232C |
| Memory | 32 MB RAM, 16 MB Flash |
| Control Panel | 4 buttons, 4 LEDs |
| Colour | Black |
Frequently Asked Questions
Is the Citizen CL-S521II direct thermal?
Yes. The CL-S521II is a direct thermal label printer, so it prints on compatible direct thermal media and does not use ribbons.
Does this model include Ethernet?
No. This configuration includes USB and serial interfaces. Ethernet is available as an optional interface on compatible configurations.
Is 203 dpi suitable for barcode labels?
Yes, 203 dpi is suitable for standard barcode, shipping, product and logistics labels. For very small text or dense barcode detail, a 300 dpi model may be more suitable.
Singular Expert Insight
Choose this model if you need a robust 4-inch direct thermal printer with USB and serial connectivity for standard labels. If you need wired network sharing, choose a configuration with Ethernet instead.
Buyer’s Guide
Buy it if: you need a durable 4-inch direct thermal label printer with USB and serial connectivity for barcode, shipping, retail or logistics labels.
Skip it if: you need thermal transfer ribbon printing, built-in Ethernet, Wi-Fi, 300 dpi detail or colour printing.
Also consider: an Ethernet-equipped CL-S521II configuration for shared network printing, or a thermal transfer model if label durability is critical.