Model comparisons
PT-550, PT1650 or PT-D610BT: choose by tape and workflow
These three Brother P-touch models solve different jobs, despite sharing a keyboard-and-cassette idea. The discontinued PT-550 is the wide, multi-line desk machine; the PT1650 is an earlier handheld with USB data transfer and local printing; the current-reference PT-D610BT is a connected desktop option using TZe tape. Start with the way you compose and the cassette width you can actually obtain, then compare layouts and power.
Choose the machine around the work
| Model | What it is good at | What to check first |
|---|---|---|
| PT-550 | On-device QWERTY entry, automatic cutting, up to seven lines and original TZ widths through 36 mm; its current TZe table is a separate two-line, 12 mm maximum profile. | It is discontinued. Use the U.S. manual for the older TZ route and the exact PT550 table for TZe. Do not infer that the related TZE545/TZE661 supply links establish 18/36 mm TZe compatibility. |
| PT1650 | A handheld ABCD-keyboard format and USB transfer of templates or database records that are printed at the machine; original TZ reaches 24 mm. | It is earlier and discontinued. USB is a transfer route, not direct computer printing, and its TZe plan is conservatively limited to the documented two-line profile. |
| PT-D610BT | A current-reference desk machine with a QWERTY keyboard, TZe tape through 24 mm, USB and Bluetooth routes, and an automatic cutter. | It does not replace PT-550's 36 mm original-TZ width. Check the live model and supply record if an exact cassette or connection is essential. |
Why the PT-550 is not simply an older PT-D610BT
The PT-550 suits a setup that needs wider labels or dense printed layouts and already has a working machine. Its original U.S. guide lists six TZ widths from 6 to 36 mm, seven lines per label, five text blocks, numbering, barcode generation and automatic cutting. It is a substantial desk unit running on eight AA cells, with an optional AD-60 adapter. Its guide does not establish a current phone app, wireless path or USB workflow. A feature-rich vintage machine can still be a poor fit if the buyer cannot obtain its supplies, accessories or support.
Brother's later PT-550 FAQ confirms the TZe cassette family, while the current exact-model table lists TZe at 3.5/6/9/12 mm and a two-line maximum. Although the product record cross-links TZE545 and TZE661 in its recommended-supplies area, that link is weaker than the explicit compatibility table and does not establish 18/36 mm support. The U.S. guide's seven-line, 36 mm instructions refer to the older TZ workflow; do not transfer them to TZe. An existing PT-550 owner should identify the cassette family and width before depending on either layout.
When the other workflows win
Pick the PT1650 when the work moves between locations and you want its handheld body, alphabetic keyboard or older USB template/database-transfer workflow. For that model, prepared records still print on the labeler, so an operator must carry and run the unit. If you need a fresh computer or phone workflow instead of a legacy machine, the PT-D610BT is the more relevant current-reference choice: it has Bluetooth and USB input routes, but stays within 24 mm TZe. The PT-550 offers width and older layout functions, not a current app ecosystem.
For an existing PT-550, inspect the tape-feed path, print head, cutter, display and battery contacts before relying on a used unit. Brother's original package brochure lists batteries and a tape, but the contents of any later offer are individual to that listing. If buying new, choose between the current model's supported cassette and connection rather than searching for a discontinued package. Use the individual reviews for the exact media and power constraints before deciding.
Model sources: Brother's PT-530/550 U.S. English guide, PT550 U.S. supplies/support page, PT-550 TZe FAQ and the linked PT550 product page; exact model guides and support records for the PT1650 and PT-D610BT are linked from their reviews.