HL-L6400DW

The Brother HL-L6400DW monochrome laser printer accepts four black toner cartridges, and choosing among them is mostly a question of how busy the machine is. The ladder starts with the standard-yield TN820 at about 3,000 pages, climbs through the high-yield TN850 at about 8,000 and the ultra high-yield TN880 (TN-880) at about 12,000, and tops out at the TN890 extra high-yield cartridge, built for the busiest queues at about 20,000 pages per cartridge. Every one of them works with the DR820 (DR-820) drum unit, rated at about 30,000 pages — up to about 50,000 when jobs run three pages at a time. Compatible and genuine versions of the range are listed below, singles through ten-packs.

The TN890 changes the stocking conversation for this machine. A 20,000-page cartridge in a busy department turns toner ordering from a monthly errand into a quarterly one, and it means the spare on the shelf is insurance rather than a routine need. The drum still turns over faster than the biggest cartridge — about one and a half TN890s per DR820 — so on an HL-L6400DW the drum, not the toner, becomes the part to watch. The listings below are organized to make both rhythms easy to keep.

Toner Cartridges for HL-L6400DW

Cartridge	Color	Page Yield
TN820 — compatible black, individual cartridge	Black	3,000 pages
TN820 — genuine Brother black, individual cartridge	Black	3,000 pages
TN850 — compatible black, individual cartridge	Black	8,000 pages
TN850 — genuine Brother black, individual cartridge	Black	8,000 pages
TN880 — compatible black, individual cartridge	Black	12,000 pages
TN880 — compatible black, individual cartridge	Black	12,000 pages
TN880 — compatible black, individual cartridge	Black	12,000 pages
TN880 — genuine Brother black, individual cartridge	Black	12,000 pages
TN890 — compatible black, individual cartridge	Black	20,000 pages
TN890 — genuine Brother black, individual cartridge	Black	20,000 pages
TN820 — compatible black, two-pack	Black	3,000 pages
TN820 — compatible black, three-pack	Black	3,000 pages
TN820 — compatible black, five-pack	Black	3,000 pages
TN820 — compatible black, ten-pack	Black	3,000 pages
TN850 — compatible black, two-pack	Black	8,000 pages
TN850 — compatible black, two-pack	Black	8,000 pages
TN850 — genuine Brother black, two-pack	Black	8,000 pages
TN850 — compatible black, three-pack	Black	8,000 pages
TN850 — genuine Brother black, three-pack	Black	8,000 pages
TN850 — genuine Brother black, four-pack	Black	8,000 pages
TN850 — compatible black, five-pack	Black	8,000 pages
TN850 — compatible black, five-pack, premium quality	Black	8,000 pages
TN850 — compatible black, ten-pack	Black	8,000 pages
TN880 — compatible black, two-pack	Black	12,000 pages
TN880 — compatible black, two-pack	Black	12,000 pages
TN880 — genuine Brother black, two-pack	Black	12,000 pages
TN880 — compatible black, three-pack	Black	12,000 pages
TN880 — compatible black, four-pack	Black	12,000 pages
TN880 — compatible black, ten-pack	Black	12,000 pages
TN890 — compatible black, two-pack	Black	20,000 pages
TN890 — compatible black, four-pack	Black	20,000 pages

On the drum side: DR820 units in several pack sizes, toner-and-drum sets, and the genuine Brother bundles.

Which cartridge should you buy?

For the queues this printer was built for, start at the top of the ladder. The TN890 stretches a single swap to about 20,000 pages, the longest interval available for the HL-L6400DW, and suits machines that print all day. The TN880 is the value step just below it — about 12,000 pages, widely stocked in multipacks, and the better pick when 20,000 pages would sit in the machine longer than you are comfortable with. The TN850 and TN820 serve lighter satellite roles where the big cartridges would take a year to empty. Whichever rung you choose, plan the drum separately: at about 30,000 pages it will come due part-way through your second TN890, and the sets on this page pair the replacement drum with toner.

Chip, toner and everyday use

A cartridge rated at 20,000 pages can live in the machine for months, so chip reporting matters: the TN890's chip keeps the printer's level reading honest across that whole span, and a fresh cartridge should show full immediately after fitting. Yields are quoted at about 5% coverage — invoice-and-letter work tracks the rating, dense forms work will not. Keep the spare cartridge sealed until its day comes; an opened spare stored in a warm print room ages faster than one left in its bag. And when the drum is eventually changed, reset its counter in the menu so the long drum cycle is measured from the right start.

Frequently Asked Questions

What is the TN890, and does it fit the HL-L6400DW?

The TN890 is the extra high-yield cartridge at the top of this printer's range, rated at about 20,000 pages — built specifically for the busiest HL-L6400DW print queues. It fits this model and is listed here in compatible form and as a genuine Brother cartridge.

TN880 or TN890 — which should a busy office choose?

Choose by swap tolerance. The TN890 prints about two-thirds more pages per cartridge than the TN880 (roughly 20,000 against 12,000), so the busiest machines touch toner least often on it. The TN880 costs less per box and comes in more pack sizes, which suits steady but not extreme volume.

Does the HL-L6400DW use a separate drum?

Yes — the DR820 drum unit is separate from the toner, rated at about 30,000 pages with single-page jobs and up to about 50,000 with three-page jobs. It is replaced far less often than toner, and drum-and-toner sets are listed for when the two changes coincide.

Is a genuine TN890 available, or only compatible?

Both are listed on this page: the genuine Brother TN890 single cartridge and the compatible TN890 in single, 2-pack and 4-pack form, so the top of the ladder is covered either way you buy.