Lexmark 12A6735 Black Toner Cartridge – Compatible Replacement

Lexmark 12A6735 Black at a glance: a black high-yield toner cartridge rated at about 20,000 pages. Compatible: newly manufactured to the original's size and specifications. Fits the T520, T520d, T520dn and other models listed below. Backed by our 1-year 100% satisfaction guarantee; orders placed by 4 PM ET (Mon–Fri) ship the same day from Georgia.

Key Facts

What's in the Box

• 1 × Lexmark 12A6735 Black compatible toner cartridge — about 20,000 pages

Page yield is 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 (9 models)

• Lexmark T520
• Lexmark T520d
• Lexmark T520dn
• Lexmark T520n
• Lexmark T522
• Lexmark T522dn
• Lexmark T522n
• Lexmark X520
• Lexmark X522

Don't mix these up: Not 12A6830 (T522 standard return program, not checked).

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.

Part Numbers & Also Known As

This toner cartridge replaces or is also searched for as: 12A6735

Installation & Troubleshooting

Installing: open the printer's front or top cover and pull the empty cartridge out by its handle. Gently rock the new cartridge side to side five or six times to spread the toner, pull the sealing tape straight out if there is one, slide it in until it seats and close the cover.

Supply messages: if the printer shows a "non-genuine" or "used supply" notice, press OK or Continue to keep printing. If the cartridge isn't recognized, check that all packing material is off and reseat it firmly.

Streaks or faint print: rock the cartridge again to redistribute the toner and print a cleaning page from the printer menu.

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) supplies are new from the printer brand and cost the most. Compatible supplies, like this one, are newly manufactured by a third party to the original's size and page-yield specifications, so they drop into the same slot at a much lower price. Remanufactured supplies are emptied originals that have been cleaned and refilled.

Other Options for the Same Printers

• Lexmark 12A0825 Toner Cartridge
• Lexmark 12A5740 Black Toner Cartridge
• Lexmark 12A5745 Black Toner Cartridge
• Lexmark 12A5845 Black Toner Cartridge
• Lexmark 12A6765 Black Toner Cartridge
• Lexmark 12A6865 Black Toner Cartridge for T620 / T622 / X620e
• Lexmark 12A7362 Black Toner Cartridge for T630 / T632 / T634
• Lexmark 12A7365 Black Toner Cartridge for T630 / T632 / T634

Frequently Asked Questions

How many pages does the Lexmark 12A6735 Black print?

About 20,000 pages, based on Lexmark's rating for the original 12A6735 at roughly 5% coverage.

Which printers does it fit?

T520, T520d, T520dn, T520n, T522, T522dn and other models listed below. See the full list above, or check our Find Ink by Printer page.

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 Georgia, by USPS (2–5 business days). Expedited 1–2 day delivery is available at checkout, and shipping is free on orders over $50.