MB Series
The MB Series is Okidata's monochrome multifunction line — the printers here print, scan and copy, and every one of the 93 listings on this shelf is black. Nine codes cover the whole series, and there is a fact worth knowing before you compare prices anywhere: eight of those nine codes are the same codes sold on the Oki B Series shelf. The multifunction machines and their single-function cousins draw from one shared pool of cartridges, among them the 44574701, the 43979101 and the 44992405.
Only one code on this shelf belongs to the MB Series alone: the 56123402, sold for the MB260 family. Everything else crosses over, including the two drum units — the 43979001 and the 44574301 — which are separate parts on their own replacement cycle, just as they are in the B Series. So an MB owner's real question is never "which series shelf do I shop from" but simply "which code is printed on my cartridge."
Popular cartridges for MB Series
| Cartridge | Color / Type | Page Yield |
|---|---|---|
| 44992405 | Black | See product page |
| 44574701 | Black | See product page |
| 56123402 | Black | See product page |
| 43979101 | Black | See product page |
| 43979201 | Black, high yield | See product page |
| 44574901 | Black, high yield | See product page |
| 43979215 | Black, extra high yield | See product page |
| 43979001 | Black, drum unit | See product page |
| 44574301 | Black, drum unit | See product page |
Which cartridge should you buy?
Open your model page first — the MB260, the MB451 and the MB491 pages each list the cartridges confirmed for that machine, including the variants with W, DNW and MFP suffixes, which are separate model pages here. Match the code on the cartridge you remove. Where a high-yield version of your code exists on this shelf — the 43979201, or the extra high yield 43979215 — it is the same fit running longer, a sensible upgrade for a multifunction that also carries the office copying. And if the code you need also appears on the B Series shelf, it is the same cartridge either way.
Chip, toner and everyday use
A multifunction works its cartridge harder than a printer does, because copying runs the same toner and drum as printing. Each toner and drum here carries a chip the machine reads for level tracking; when copy quality fades but prints from the computer still look fine, the machine is telling you about the scanning side, not the cartridge. Keep the glass clean, keep a spare cartridge in the building — an MB that stops usually stops the whole desk's paperwork — and remember these compatibles carry a one-year warranty and one-year returns.
Frequently Asked Questions
Are MB Series and B Series cartridges interchangeable?
The codes are, and that is what counts. Eight of the nine codes on this shelf are also B Series codes, so a cartridge bought under either series name works wherever its code is listed. The ninth code, 56123402, is sold for the MB260 family only.
Do all MB Series printers use the same cartridge?
No — nine codes are spread across the series, and models that look alike can take different ones. Your model page and the code on the old cartridge agree on the answer; trust those two, not the shape of the machine.
Is the drum included when I buy a toner cartridge?
No. The drum units for this series — 43979001 and 44574301 — are separate listings, replaced on a much longer cycle than the toner. Order a drum when the printer asks for one, not automatically with every toner.
My model has a suffix like W or MFP. Does it take a different cartridge?
The suffix marks a variant, and variants have their own model pages in the directory below. Variants of one model normally share that model's cartridges, but the variant's own page is the confirmation — check it before ordering.