Brother TN770 Black Toner Cartridge – Super High-Yield Compatible | Castle Ink

Brother TN770 Black at a glance: a super high-yield black toner cartridge rated at about 4,500 pages. Compatible: newly manufactured to Brother's specifications. Fits the Brother HL-L2370DWXL and MFC-L2750DWXL. The drum is separate (Brother DR730). Backed by a 1-year 100% satisfaction guarantee; orders by 4 PM ET (Mon–Fri) ship the same day from Long Island, NY.

Key Facts

What's in the Box

• 1 × Brother TN770 Black compatible toner cartridge — about 4,500 pages

Page yields are the manufacturer's rating for the matching original cartridge, measured at roughly 5% page coverage under ISO/IEC 19752 or 19798 testing. Your results will vary with what you print.

Compatible Printers (2 models)

• Brother HL-L2370DWXL
• Brother MFC-L2750DWXL

Don't mix these up: Brother sells TN770 for the HL-L2370DWXL and MFC-L2750DWXL. Those printers and the rest of the series also take TN730 (about 1,200 pages) and TN760 (about 3,000). All use the DR730 drum.

Not sure? Look up your exact model on our Find Ink by Printer page, or contact us and we'll confirm the right toner for you.

Printer guides: Brother HL-L2370DW toner guide | Brother MFC-L2750DW toner guide

Part Numbers & Also Known As

This toner cartridge replaces or is also searched for as: TN770, Brother TN770, Brother TN770 black, BrotherTN770 black, TN770 black toner, TN-770, TN 770, Brother 770 toner, HL-L2370DWXL toner, MFC-L2750DWXL toner

Chips, Printer Messages & Installation

Installing: open the front cover and lift out the drum unit with the toner attached. Push down the green lock lever to release the empty toner from the DR730 drum, then rock the new toner gently side to side and remove its protective cover. Click it into the drum until the lever lifts, slide the corona wire tab back and forth a few times to clean it, and reinstall the assembly.

"Replace Toner" after a new cartridge: make sure the cartridge is fully clicked into the drum and the cover is closed. Brother printers read toner level with a sensor, so a firmly seated cartridge clears the message.

Toner vs. drum: this is the toner only. The DR730 drum is a separate part that lasts through several toner cartridges; replace it when the printer shows "Replace Drum" or prints get spotty.

Still stuck? See our guide to fixing a cartridge that isn't recognized or contact us and we'll make it right.

Compatible vs. Remanufactured vs. Original

Original (OEM) toner is new from the printer brand and costs the most. Compatible toner, like this cartridge, is newly manufactured by a third party to the original's size, chip and page-yield specifications, so it drops into the same slot at a much lower price. Remanufactured toner is an emptied original cartridge that has been rebuilt and refilled. Castle Ink sells compatible (newly manufactured) toner and remanufactured inkjet cartridges.

Other Options for the Same Printers

• Brother DR730 Drum Unit
• Brother TN760 Black Toner Cartridge

Frequently Asked Questions

How many pages does the Brother TN770 black print?

About 4,500 pages, based on Brother's rating for the original TN770 at roughly 5% coverage.

Will TN770 work in my HL-L2350DW or MFC-L2710DW?

Brother lists TN770 for the XL models. Many owners use it in other TN760 printers, but Brother does not officially support that, so TN760 is the safe choice for non-XL models.

Will this void my printer warranty?

No. Under the U.S. Magnuson-Moss Warranty Act, a manufacturer can't void your printer warranty just because you used a third-party or remanufactured supply. If a non-original supply directly caused damage, that specific repair might not be covered.

How long can I store it?

Sealed toner keeps for about two years at room temperature. Keep it in its bag, away from heat and direct sunlight, and store it flat.

When will my order ship?

Orders placed by 4 PM ET, Monday through Friday, ship the same business day from Long Island, NY, by USPS (2–5 business days). Expedited 1–2 day delivery is available at checkout, and shipping is free on orders over $50.