C5400TN

Departments that print in color all day are the audience for the Okidata C5400TN, a color laser from OKI's office workhorse series. It shares the Type C6 cartridge family with the rest of the C5400 line — yellow 42804501, magenta 42804502, cyan 42804503 and black 42804504 — and for heavy users this page stocks the high-capacity colors: 42127402 magenta, 42127403 cyan and 42127401 yellow.

The TN letters are a configuration, not a different printer: an extra paper tray under the machine and a network connection on the back. What they signal is intent — this variant was sold to departments expecting volume, where the tray keeps letterhead or plain stock loaded side by side and the printer rarely sits idle. Toner planning follows from that: a department C5400TN consumes color steadily, so the high-capacity cartridges are less an upgrade than the correct consumable for the job it was bought to do.

Toner Cartridges for C5400TN

Cartridge	Color	Page Yield
42127403	Cyan	See product page
42127402	Magenta	See product page
42127401	Yellow	See product page
42127403	Cyan	See product page
42127402	Magenta	See product page
42127401	Yellow	See product page

Sets and multi-packs stocked on this page:

Which cartridge should you buy?

Order the high-capacity colors if your C5400TN prints color daily — on a department machine they hold the cost per page down and, just as usefully, they halve the number of times someone has to stop and swap a cartridge mid-run. The standard Type C6 cartridges (42804501 through 42804504) remain the fallback for a lightly used machine. A practical stocking rule for departments: one full spare set on the shelf, reordered when the first spare goes into the printer, so the machine never waits on shipping. Black on this model is the standard 42804504, and colors are always replaced one at a time as each empties.

Chip, toner and everyday use

High-volume color printing is where chip reliability shows: the C5400TN reads the cartridge chip for identification and level tracking, and a compatible cartridge with the correct chip installs without workarounds. Remember that yield ratings are set at 5% coverage — a department printing color charts and shaded forms all day works its cartridges far harder than the rating assumes, so judge replacements by your own page counts. Toner cartridges prefer a cool, dry shelf away from windows; a spare stored above a radiator or in sunlight can clump before it is ever opened. Keep the printer's vents unobstructed during long runs to protect print quality.

Frequently Asked Questions

What does the TN in C5400TN mean?

It marks the configuration: T for the extra paper tray and N for network connectivity. The toner is unchanged from the base C5400 — the same Type C6 set fits every C5400 variant.

What toner fits the Oki C5400TN?

The Type C6 family — yellow 42804501, magenta 42804502, cyan 42804503 and black 42804504. (Some older store text listed those color assignments in the wrong order; the mapping here follows the cartridge numbers themselves.) The high-capacity colors stocked here are 42127401 yellow, 42127402 magenta and 42127403 cyan.

Thin white lines are appearing in my black text. Is that toner?

Lines that repeat down the page usually point at the drum or a dirty transfer path rather than an empty cartridge. Try a known-good cartridge first; if the lines stay in the same place, the printer needs cleaning or service, not more toner.