Samsung MLT-D203U Black Toner Cartridge – Ultra High-Yield Compatible

Samsung MLT-D203U Black at a glance: an ultra high-yield black toner cartridge rated at about 15,000 pages. Compatible: newly manufactured to Samsung's specifications. Fits the Samsung ProXpress M4020ND and M4070FR. The imaging drum is built in. 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 × Samsung MLT-D203U Black compatible toner cartridge — about 15,000 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)

• Samsung ProXpress SL-M4020ND
• Samsung ProXpress SL-M4070FR

Don't mix these up: MLT-D203U (ultra high yield) fits the M4020ND and M4070FR only. The M3320–M3870 take MLT-D203S, D203L or D203E.

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: MLT-D203U, Samsung MLT-D203U, Samsung MLT-D203U black, SamsungMLT-D203U black, MLT-D203U black toner, MLTD203U, D203U, Samsung D203U, MLT-D203U toner

Chips, Printer Messages & Installation

Installing: open the front cover, pull out the empty cartridge by its handle, then rock the new cartridge gently side to side five or six times to spread the toner. Remove the protective tape or sheet, slide the cartridge in until it locks and close the cover.

Supply messages: the printer may show a "non-genuine toner" notice. Press OK to keep printing. Turning off automatic firmware updates helps keep compatible chips working.

Streaks or faint print: rock the cartridge again and print a cleaning page from the printer menu. The imaging drum is built into these cartridges, so a new cartridge also renews the drum.

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

• Samsung MLT-D203E Black Toner Cartridge
• Samsung MLT-D203L Black Toner Cartridge
• Samsung MLT-D203S Black Toner Cartridge

Frequently Asked Questions

How many pages does the Samsung MLT-D203U black print?

About 15,000 pages, based on Samsung's rating for the original MLT-D203U at roughly 5% coverage.

Will it work after a firmware update?

Samsung (now HP) firmware updates can block compatible chips. Keep automatic updates off. If your printer already updated, contact us before ordering.

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.