The Entry All-in-One, Supplied Like Its Bigger Brothers

Brother's TN635 all-in-one range starts here, and the good news is that "entry" describes the scanner and screen, not the supplies. This model drinks from exactly the same cartridge shelf as the flagship MFC-L8970CDW: same three tiers, same yields, same drum. It even arrives with the same full standard-yield set in the box — 3,000 pages of black and 1,800 of each color.

Where it does step down is hardware around the toner: a 3.5-inch touchscreen instead of 7 inches, two-sided scanning up to 58 images per minute instead of 104, and a paper ceiling of 800 sheets rather than 1,340. None of that changes a single cartridge decision — it just means a smaller office reaches the toner warnings on a gentler schedule.

Prices and Yields

Cartridge	Yield	Our compatible price*	Cost per page
TN635BK (black)	~3,000 pages	$50.80	≈1.7¢
TN635C / M (each)	~1,800 pages	$50.80	≈2.8¢
TN635Y	~1,800 pages	$47.34	≈2.6¢
TN635XLBK (black)	~5,500 pages	$53.30	≈1.0¢
TN635XLC / M (each)	~4,500 pages	$53.30	≈1.2¢
TN635XLY	~4,500 pages	$46.48	≈1.0¢
TN635XXLBK (black)	~7,500 pages	$76.47	≈1.0¢
TN635XXLC / M / Y (each)	~6,500 pages	$76.47	≈1.2¢

*Prices checked on our product pages on November 2, 2026; they can change. Yields are Brother's ratings.

For this model's typical workload — a small team printing and copying daily at up to 33 pages per minute — the XL tier is the sweet spot: it cuts black cost per page from about 1.7 cents to about 1 cent for only a couple of dollars more per cartridge. The XXL matches that per-page cost and stretches intervals to 7,500 pages; take it if the machine sits in a satellite office, skip it if someone walks past the printer every day anyway.

Every Cartridge, Color by Color

• Black: TN635BK · TN635XLBK · TN635XXLBK
• Cyan: TN635C · TN635XLC · TN635XXLC
• Magenta: TN635M · TN635XLM · TN635XXLM
• Yellow: TN635Y · TN635XLY · TN635XXLY

Swapping a Cartridge

1. Leave the machine switched on and open the front cover. 2. Pull the drum unit assembly out by its handle. 3. Press the green lock lever on the slot the touchscreen flagged, lift the finished cartridge out. 4. Rock the replacement side to side, pull off its cover, and push it into the slot until it clicks home. 5. Slide the assembly back in and close the cover; the 3.5-inch screen confirms the new level.

Scanning Habits and Toner

The 80-page auto document feeder is the feature that defines this all-in-one in daily use, and it interacts with toner in one direction only: scanning is free, copying is printing. An office that scans contracts to email and SharePoint all day may barely touch its cartridges, while the same feeder loaded for copy runs consumes toner at print speed. When you estimate how long an XL black will last, count printed and copied pages — Brother's own headline for the machine, print and copy up to 33 ppm, treats them as the same engine work, and so should your supply math.

Sets and Ordering Pattern

A four-color TN635 set does exist in our catalog — the TN635XL version, carded below at $158.14, which trims $48.24 off the $206.38 combined price of the four XL singles; standard and XXL bundles are listed alongside it. On this model the set is a convenience rather than a necessity: order the XL singles as their gauges fall, keeping perhaps one spare black — the cartridge a copy-heavy office always empties first — and let the bundle cover the rarer weeks when several colors expire together and one box beats four line items.

Drum, Belt and Waste Box

Plan around three long-life parts: the DR635CL drum at about 30,000 pages, and the BU635CL belt unit and WT229CL waste toner box at about 50,000 pages each. Our store carries no compatible versions of these yet, so they are named here without links. The display forecasts each one; none should ever catch you by surprise.

Frequently Asked Questions

Does the MFC-L8730CDW accept the TN637 ultra high-yield cartridge? No. Brother limits the TN637 to the HL-L8570CDW, MFC-L8970CDW and MFC-EX575. This model's ceiling is the TN635XXL.

Is faxing covered by the toner budget? Received faxes print, so they consume toner and paper like any print job; sent faxes are scans and cost nothing in toner.

Why does this model stop at 800 sheets of paper capacity when its brothers reach 1,340? Brother positions it for smaller teams, with fewer optional trays. It affects refills of paper, never which cartridges fit.

Can I mix an XXL black with standard colors? Yes — tiers mix freely per slot, and most owners do exactly that, since black almost always depletes first.

How many shortcuts does the touchscreen hold? Up to 48 customized shortcuts — handy for pinning "scan to our shared folder" to the home screen so the feeder gets used as intended.

Other Printers That Use TN635

Also drinking from this shelf: the HL-L8430CDW, HL-L8430CDWT, HL-L8570CDW, MFC-L8930CDW, MFC-L8970CDW and MFC-EX575. Every TN635 cartridge linked here fits all seven models; remember only that the TN637 ultra tier is exclusive to the HL-L8570CDW, MFC-L8970CDW and MFC-EX575.

Our full shelf for this machine is on the MFC-L8730CDW toner page.