CT-S851III THERMAL PRINTER USB BT INTERFACE BLACK 500 MM/SEC

Blazing 500 mm/s print speed meets rugged reliability in the CITIZEN CT-S851III — a direct thermal powerhouse built for high-volume retail and hospitality. The integrated guillotine auto-cutter slices through 80 mm receipts with surgical precision, rated for 2 million cuts, while the 200 million line MCBF ensures years of non-stop operation.

Overview

The CT-S851III is a premium POS printer engineered for speed, connectivity, and longevity. Its direct thermal line printing delivers crisp 203 dpi output on 80 mm paper (adjustable to 58 mm), with drop-in loading for effortless media changes. Dual interfaces — USB 2.0 and Bluetooth 3.0 (SPP/iAP) — provide flexible integration with Windows, Linux, macOS, Android, and iOS systems. The sleek black chassis is wall-mountable (optional bracket) and features an internal 100-240V power supply, eliminating external bricks.

What stands out

• Extreme speed: 500 mm/sec — among the fastest in its class
• Integrated auto-cutter with 2 million cut life
• Dual connectivity: USB + Bluetooth for wireless freedom
• Supports all major 1D and 2D barcodes (QR, PDF417, Data Matrix)
• Drop-in paper loading and adjustable paper width (80/58 mm)
• ESC/POS emulation for seamless software compatibility
• Wall-mountable design saves counter space
• Internal power supply — no bulky adapter

Technical details

• Print method: Direct thermal line printing
• Print resolution: 203 dpi (8 dots/mm)
• Paper width: 80 mm (58 mm with guide)
• Paper roll diameter: Max 83 mm
• Interfaces: USB 2.0, Bluetooth 3.0 (SPP/iAP)
• Cutter: Guillotine auto-cutter, 2 million cuts
• Reliability: MCBF 200 million lines
• Emulation: ESC/POS
• Barcodes: UPC-A/E, JAN/EAN 8/13, ITF, Code 39/93/128, CODABAR, PDF417, QR Code, Data Matrix
• Sensors: Paper end, paper near end, cover open
• Power: Internal AC adapter, 100-240V, 50/60Hz
• OS compatibility: Windows, Linux, macOS, Android, iOS
• Wall mountable: Yes (optional bracket)

Our verdict

The CITIZEN CT-S851III is a top-tier choice for businesses demanding speed, durability, and wireless convenience. Its 500 mm/s throughput and robust cutter make it ideal for busy checkout lines, while Bluetooth connectivity adds modern flexibility. A reliable workhorse that pays for itself in uptime.