Zebra ZD621R 4-Inch RFID Desktop Label Printer, 300 dpi, Thermal Transfer, UHF RFID, USB, Ethernet, Serial, BLE

The Zebra ZD621R (ZD6A143-30EFR2EZ) is a 4-inch thermal transfer desktop printer with a built-in UHF RFID encoder, for retail, healthcare, asset tracking and logistics teams that print and encode RFID labels in one step.

It prints at 300 dpi up to 108 mm wide and 152 mm per second, encodes RAIN RFID tags with Zebra’s RE40 reader/encoder, and connects over USB, Ethernet, serial and Bluetooth Low Energy. A 4.3-inch colour touch display shows status and RFID results at the printer.

• Zebra ZD621R RFID printer (300 dpi, thermal transfer)
• External AC power supply with power cords (EU and UK)
• USB cable
• Empty ribbon take-up cores and two 300 m ribbon core adapters
• Quick start guide and regulatory guide

• Print and encode in one pass: the printer writes the RFID chip and prints the label face in the same job, and RFID job monitoring with a timestamped log shows what was encoded and when.
• Fine print: 300 dpi keeps small text, small 2D barcodes and logos sharp on jewellery, pharmacy, electronics and asset labels.
• Ribbons: it takes both 74 m Zebra ribbons and 300 m ribbons (with the included adapters for non-Zebra cores), so high-volume users can cut ribbon changes.
• Media: labels 15–118 mm wide on rolls up to 127 mm diameter, 12.7 or 25.4 mm core (larger cores with an adapter kit). Minimum RFID tag pitch is 16 mm.
• Integration: ZPL II and EPL2 are built in, and ZPL RFID commands match earlier Zebra RFID printers, so existing RFID label formats carry over.
• Setup: the BLE link lets you configure the printer from a phone app; Ethernet and USB handle daily printing. A dual-radio Wi-Fi 6 / Bluetooth 5.3 card can be added later.

• Wi-Fi: this configuration has no Wi-Fi. Wireless printing needs the optional Wi-Fi 6 / Bluetooth 5.3 module.
• Standard labels only, no RFID: it prints normal labels too, but if you never encode RFID, the ZD621 without RFID costs less.
• HF / NFC tags: the encoder is UHF only; it does not write HF (13.56 MHz) or NFC tags.
• Wide labels: maximum print width is 108 mm; for 6-inch labels choose an industrial printer such as the ZT421.