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Citizen CT-S851II Receipt printer 300mm/s, Front, Self-retracting snap-in auto-cutter, 80mm, High-contrast backlit LCD

SKU: 

CT-S851IIS3UBUBKP

Smooth black housing and a front paper exit give this direct thermal receipt printer a compact, ready-for-action feel. The Citizen CT-S851II delivers 203 dpi printing at up to 300 mm/sec, with a spill-proof cover, high-contrast backlit LCD, and a self-retracting snap-in auto-cutter for fast, reliable POS use.
Description
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The Citizen Compact 300 (based on the CT-S851II platform) is a high-performance direct thermal receipt printer engineered for busy point-of-sale environments in retail, hospitality, ticketing and kiosk applications. Designed for fast, reliable output, it delivers up to 300 mm/s with a crisp 203 x 203 dpi resolution, supports common media widths (58–83 mm) and accepts rolls up to 83 mm diameter. The unit combines a spill‑proof, soft‑close chassis with a long‑life self‑retracting auto cutter and a high‑contrast backlit display to simplify setup and daily operation. With multiple connectivity options and a wide AC input range, it is suitable for networked and standalone deployments where uptime and low maintenance are priorities.

Key Features

  • High-speed printing: Direct thermal engine rated up to 300 mm/s for rapid transaction throughput and reduced customer wait times.
  • Crossover connectivity: Flexible interfaces across variants including USB, Ethernet, Serial, Bluetooth and Wireless LAN to fit diverse POS ecosystems.
  • Durable auto-cutter: Self-retracting snap-in cutter designed for long service life (rated up to 2,000,000 cuts) and tool-free exchange to minimize downtime.
  • Robust, serviceable design: Splash‑proof/spill‑proof cover, soft‑close lid and front paper exit facilitate placement on crowded counters and simplify maintenance.
  • Operational feedback: Integrated high‑contrast backlit LCD provides clear status messages and simplifies configuration and troubleshooting.

Specifications

  • Brand: Citizen
  • Model / Platform: CT-S851II (SpeedPrint Compact 300)
  • Print Technology: Direct thermal
  • Print Speed: 300 mm/s
  • Max Print Resolution: 203 x 203 DPI
  • Supported Paper Widths: 58, 60, 80, 83 mm
  • Maximum Roll Diameter: 83 mm
  • Paper / Media Thickness: 65–150 µm
  • Maximum Print Width: 80 mm
  • Cutter: Self-retracting snap-in auto-cutter
  • Cutter Durability: 2,000,000 cuts
  • Display: High-contrast backlit LCD
  • Splash-proof / Spill-proof: True
  • Connectivity (varies by variant): USB, USB-A, Serial, Parallel, Ethernet (RJ-45), Bluetooth, Wireless LAN (Wi‑Fi), Powered USB
  • Buffer Size: 4 KB
  • Flash Memory: 0.384 MB
  • Dimensions (W × H × D): 145 × 148 × 192 mm
  • Weight: 2000 g
  • AC Input Voltage: 100 - 240 V
  • AC Input Frequency: 50 - 60 Hz
  • Integrated Power Supply: True
  • Operating Temperature: 5 - 45 °C
  • Storage Temperature: -20 - 60 °C
  • Operating Relative Humidity: 10 - 90 %
  • Storage Relative Humidity: 10 - 90 %

Main Features

  • POS: Yes

  • DPI: 203 dpi

  • Case color: Black

  • Connection: Serial, WLAN/Wi-Fi, Bluetooth, Ethernet, USB

  • Optional Upgrades: Cutter, Peeler

Documents
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Product document mod-ct-s851ii-citizen-receipt-printers-datasheet.pdf CT-S851IIS3UBUBKP Product document mod-ct-s851ii-citizen-receipt-printers-manual-en-de-fr-es-it.pdf CT-S851IIS3UBUBKP Product document mod-ct-s851ii-citizen-receipt-printers-user-manual.pdf CT-S851IIS3UBUBKP Product document mod-ct-s851ii-citizen-receipt-printers-datasheet.pdf MOD-CT-S851II Product document mod-ct-s851ii-citizen-receipt-printers-manual-en-de-fr-es-it.pdf MOD-CT-S851II Product document mod-ct-s851ii-citizen-receipt-printers-user-manual.pdf MOD-CT-S851II
FAQs
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How fast does the Citizen CT-S851II print, and what resolution does it produce?
The Citizen CT-S851II prints at up to 300 mm/s using a direct thermal engine and produces output at 203 x 203 dpi, making it well suited for high-volume POS environments where speed and print clarity matter.
What paper widths and roll sizes does the Citizen CT-S851II support?
It accepts paper widths of 58, 60, 80, and 83 mm, handles media thickness from 65 to 150 µm, and accommodates rolls up to 83 mm in diameter, with a maximum print width of 80 mm.
What connectivity options are available on the Citizen CT-S851II?
The CT-S851II supports USB, USB-A, Serial, Parallel, Ethernet (RJ-45), Powered USB, Bluetooth, and Wireless LAN (Wi-Fi), providing flexibility to integrate into a wide range of POS and networked environments.
How durable is the cutter on the Citizen CT-S851II, and is it easy to service?
The self-retracting snap-in auto-cutter is rated for up to 2,000,000 cuts and is designed for tool-free exchange, minimizing downtime during maintenance.
What are the physical and environmental specifications of the Citizen CT-S851II?
The printer measures 145 x 148 x 192 mm (W x H x D), weighs 2,000 g, includes an integrated power supply accepting 100-240 V AC at 50-60 Hz, and operates in temperatures from 5 to 45 °C with relative humidity between 10 and 90 percent.
Can the Citizen CT-S851II be upgraded with a cutter or peeler, and what sectors is it designed for?
Optional cutter and peeler upgrades are available for the CT-S851II, and the printer is engineered for retail, hospitality, ticketing, and kiosk applications where reliable, high-speed receipt output is a priority.