What Toner Does the Brother MFC-L3780CDW Use?
Nov 8th 2026
Quick answer: TN229 standard-yield or TN229XL high-yield toner — and only that family. The MFC-L3780CDW takes the TN229BK/C/M/Y cartridges (about 1,500 pages black, 1,200 per color) or the TN229XLBK/C/M/Y high-yield versions (about 3,000 black, 2,300 per color), running over a DR229CL drum unit rated around 20,000 pages. It does not take TN227, whatever a stray listing or an old habit tells you — more on that in the FAQ, because it is the single most common ordering mistake for this printer.
This is the family's small-office flagship: up to 31 pages per minute, single-pass two-sided scanning through a 50-sheet feeder, a 3.5″ touchscreen, Gigabit Ethernet, NFC for tap-to-print and badge work, and a 30-sheet multipurpose tray on top of the standard 250.
The Supply Shelf
| Supply | Rating |
|---|---|
| TN229 black / colors | ~1,500 / ~1,200 pages |
| TN229XL black / colors | ~3,000 / ~2,300 pages |
| DR229CL drum unit | ~20,000 pages |
| BU229CL belt unit | ~50,000 pages |
| WT229CL waste toner box | ~50,000 pages |
Unusually, the starters are half-decent: Brother ships this model with a black starter rated around 2,300 pages and color starters around 1,200 — the same as full standard-yield colors. Your first supply order is therefore likely to be a black cartridge, not a full set.
Costs, Worked Out
Our compatible TN229XL cartridges are $37.84 each as of November 2, 2026. Divide by Brother's rated yields and you get roughly 1.3¢ per black page and 1.6¢ per color page. The standard-yield compatibles ($30.98 black, $31.47 colors) come out near 2.1¢ and 2.6¢. On a machine rated for up to 4,000 pages a month — with a 50,000-page maximum duty cycle — the XL's lead compounds fast.
Order colors one at a time, by exact code: TN229XLBK Black · TN229XLC Cyan · TN229XLM Magenta · TN229XLY Yellow
Standard yield: TN229BK · TN229C · TN229M · TN229Y
Should You Buy the Four-Color Set?
The compatible TN229XL four-color set costs $103.13 here, versus $151.36 for the same cartridges separately — $48.23 saved, and a complete restock in one box. In a busy office where the L3780 is the only color machine, that is the pattern that keeps it running.
The honest counter-case is built into this model's starter loadout: with a 2,300-page black in the box and 1,200-page colors, your colors and black will fall out of step. If the supplies screen shows one cartridge low and three healthy, a single is the correct purchase, and the set can wait for the day the levels converge.
Replacing a Cartridge
1. Open the top cover and pull the cartridge tray out to its stop. 2. Lift out the cartridge for the color the touchscreen names. 3. Peel the protective cover from the replacement after rocking it gently to distribute the toner. 4. Click it into its color bay, then slide the bay's green tab across and back to clean the corona wire. 5. Slide the tray in, close the cover, and allow the calibration cycle to run.
Two Things Worth Knowing About This Model
Single-pass duplex scanning is the real upgrade. The feeder reads both sides of a sheet in one pass — duplex scan speeds up to 58 ipm in black and 34 in color — so a 30-page two-sided contract becomes a file in under a minute, both sides, no re-feeding. That speed is also why this model tends to anchor an office's paperwork, and why its toner use runs ahead of its slower siblings.
It carries the family's extras tray. The 30-sheet multipurpose tray (280 sheets total capacity) takes envelopes, letterhead and heavier stock without unloading the main tray. Combined with NFC tap-to-print, the L3780 is the model in this range most often shared by a whole team — shared machines should default to XL.
Frequently Asked Questions
Does the MFC-L3780CDW use TN227 toner? I keep seeing it suggested. No — and this confusion costs people real money. TN227 belongs to the previous Brother color generation (the HL-L3270CDW / MFC-L3770CDW era). The MFC-L3780CDW is a TN229/TN229XL machine. The model numbers sound alike (L3770 versus L3780), which is exactly how the wrong cartridge gets ordered. Check the code on the cartridge you pull out; it will say TN229.
What does the multipurpose tray hold? Up to 30 sheets, for envelopes, labels, letterhead and media the main tray should not carry. Total paper capacity is 280 sheets including it.
How fast does it scan two-sided documents? Up to 58 images per minute in black and 34 in color, in a single pass — no flipping mechanism involved.
When will I need a drum? The DR229CL is rated around 20,000 pages. Expect the prompt after roughly seven XL black cartridges, or sooner if print quality fades and a fresh cartridge does not restore it.
Can visitors print without joining our network? Yes — Wi-Fi Direct and NFC tap-to-print both allow it, alongside AirPrint and Brother's mobile app.
brother tn229xl tn229xlbk tn229xlc tn229xly tn229xlm toner c
brother tn229 tn229bk tn229c tn229y tn229m toner cartridge 4
brother tn229xl tn229xlbk toner cartridge black
brother tn229xl tn229xlc toner cartridge cyan
brother tn229xl tn229xlm toner cartridge magenta
brother tn229xl tn229xly toner cartridge yellowKey takeaways
- The top cartridge here is rated at 2,300 pages — fewer swaps, lower cost per page.
- Toner and drum are separate parts on this printer — replace only the one the printer asks for.
Other Printers That Use TN229 and TN229XL
Reorder with confidence from the MFC-L3780CDW category page, where only this model's supplies are listed.