OKI Toner Cartridge Compatibility Guide: B, MB, C & MC Series Explained

OKI is the original LED printing brand and a workhorse in SMB and enterprise mono printing — but the cartridge naming is dense: 45807102, 45807106, 44574901, plus a separate drum line (44574302). Order by model alone and you'll overpay for the wrong capacity or, worse, install a toner into a printer that expects a higher-yield chip. This guide decodes the B / MB / C / MC families, maps SKUs to printers, and shows where compatible OKI toner can save 40–60% without sacrificing reliability.

Why OKI is different: LED printing, not laser

OKI is the last major manufacturer still shipping LED-page printers as a core product line (Xerox has largely shifted to laser). The technology difference matters when sourcing toner:

• LED arrays replace the moving laser scanning mirror with thousands of fixed LEDs that expose the entire page width in one pass
• Fewer moving parts — no rotating polygon mirror, no scanning motor, no calibration drift over time
• Sharper dot placement at the edges of the page, particularly on tabloid (11x17) media
• Toner formula is fine-tuned for the LED exposure energy profile — generic laser-compatible toner can work but is not always optimal

For procurement, the practical implication is that OKI printers have longer mechanical service intervals (LEDs don't wear out like laser scanners) and the toner chemistry has stayed relatively stable across generations. Compatible cartridges from established factories match OEM yield closely because the formulation has not changed significantly since the early 2010s. For a primer on the broader OEM vs compatible math, see our OEM vs compatible comparison.

Decoding the OKI 45807 / 44574 / 44606 numbering

OKI toner SKUs follow a consistent structure: a 5-digit family code (45xxx) followed by a 4-digit capacity / color variant. The structure breaks into clear families:

The single most common OKI ordering mistake is confusing 45807102 and 45807106. They look identical from the outside but the high-yield version carries 7,000 pages of toner vs the standard 3,000. Always check the SKU printed on the empty cartridge, not just the printer model. Browse our OKI cartridge catalog for a printer-to-cartridge map. For a parallel view on how OKI fits into the broader cost-per-page picture for SMB mono fleets, see our monochrome 21–44 ppm buying guide.

B and MB series: the workgroup mono backbone

The B and MB series is OKI's mid-range A4 mono workgroup platform, with B = printer and MB = multifunction. The cartridge compatibility is the cleanest part of the OKI lineup:

• B412dn / B412dnw — entry mono, 33 ppm, uses 45807102 (3K) standard or 45807106 (7K) high yield
• B432dn / B432dnw — workgroup mono, 40 ppm, same cartridges as B412
• B512dn / B512dnw — higher-volume workgroup, 45 ppm, same cartridges as B412/B432 plus 44574901 (10K) very high yield
• MB472w / MB472dnw — multifunction mono, 33 ppm print, same cartridges as B412
• MB492 / MB562 — higher-volume multifunction mono, 40–45 ppm, same cartridges as B432/B512

Across the entire B412–MB562 range, only two toner SKUs cover everything: 45807102 (3K standard) and 45807106 (7K high yield), plus 44574901 (10K very high yield) for the highest-volume machines. This makes fleet inventory simple — three SKUs cover ~80% of all OKI mono workgroup installations.

C and MC series: A4 color LED multifunction

The C and MC series is OKI's A4 color LED platform. C = single-function color printer, MC = multifunction color. The cartridge structure separates black from CMY:

• C310 / C310DN / C330 / C330DN — entry A4 color, 20–22 ppm. Cartridges: 3.5K black / 2K color (Type 44606xxx)
• C510 / C511 / C530 / C531 — mid-workgroup color, 26–30 ppm. Cartridges: 5K black / 5K color (Type 44607xxx)
• C610 / C610DN / C711 / C711DN — high-volume workgroup color, 32–36 ppm. Cartridges: 8K black / 8K color (Type 44992xxx)
• MC351 / MC352 / MC361 / MC362 — color MFP, 22–24 ppm. Same cartridges as C310/C330
• MC561 / MC562 — color MFP, 26–30 ppm. Same cartridges as C510/C530

Color OKI cartridges follow the same chip-generation pattern as Lexmark and Xerox: the 44606 vs 44607 vs 44992 generations are not interchangeable even when the physical shape matches. Always match the SKU on the cartridge, not the printer model.

Drum units: the often-forgotten consumable

Unlike most competitors, OKI's printer and printer models separate toner cartridge from drum unit. The drum unit is the long-life component that does the actual image transfer; the toner cartridge is just the consumable. Common OKI drum SKUs:

• 44574302 — B411 / B431 drum, 25K pages
• 44574402 — B412 / B432 / B512 / MB472 / MB492 / MB562 drum, 25K pages
• 44606xxx — color drum units for C310 / C330 / MC351 / MC362, 20K–30K pages

The drum usually lasts 5–8x longer than the toner cartridge. Order drum replacements only when the printer prompts "replace drum" — premature replacement wastes the remaining life. For the broader yield math, see our toner yield explainer.

Compatible OKI toner: what to look for

Compatible OKI toner from established aftermarket factories now reaches ISO yield parity on the standard 45807102 / 45807106 SKUs and OEM-equivalent monochrome print quality. Things to verify when sourcing:

• Chip firmware — quality compatibles ship with the latest chip firmware; older chips cause false "toner low" or "unauthorized supply" warnings
• Yield accuracy** — genuine OKI 45807106 is rated 7K at 5% coverage; quality compatibles deliver 6.8–7.2K on the same coverage
• Print quality** — black-on-white is essentially indistinguishable. No special considerations for LED vs laser
• Firmware updates — OKI occasionally pushes firmware that blocks older chips; reliable suppliers refresh chip firmware every 60–90 days
• Warranty — using compatible cartridges cannot void the printer warranty on its own (U.S. Magnuson-Moss and equivalent EU rules)