TEC B-427-DH20-US-FE Thermal Barcode Label Printer 9-Pin Serial RS-232 120V

TEC B-427-DH20-US-FE Thermal Barcode Label Printer 9-Pin Serial RS-232 120V

The TEC B-427-DH20 is a desktop direct thermal barcode label printer manufactured by Tokyo Electric Co., Ltd. (TEC) in Japan. It connects to a host system via a 9-pin serial (RS-232) data port and is designed for printing barcode labels, price tags, and shipping labels in light industrial and retail environments. This unit is being sold AS-IS for parts or repair and has not been tested or verified functional.

Specifications & What's Included

• Manufacturer: TEC (Tokyo Electric Co., Ltd.)
• Model: B-427-DH20 / Full part number: B-427-DH20-US-FE
• Print technology: Direct thermal
• Data interface: 9-pin serial (RS-232)
• Power input: AC 120V, 60Hz, 1.1A
• Certifications: UL Listed 636A (Barcode Printer), CSA
• Country of manufacture: Japan
• Form factor: Desktop
• Includes: Unit and AC power cord only — no media, ribbon, or interface cable

Applications

The TEC B-427 series was a line of compact desktop thermal label printers widely used in retail, warehouse, and light manufacturing settings for printing barcode labels, shelf tags, and shipping labels. Direct thermal printers like this one use heat-sensitive label stock and require no ink ribbon, making them straightforward to maintain. The 9-pin serial RS-232 interface was the standard connection for label printers of this generation — typically the mid-to-late 1980s through 1990s — linking to DOS-based POS systems, inventory management software, or dedicated label-design applications. Buyers today typically source units like this for spare parts, as a display or collector piece, or for compatibility testing with legacy serial-based systems that still rely on this interface standard.