C3520

OKI positioned the C3520 as an affordable color laser for small businesses that need crisp business documents. It shares the C3300 cartridge family — black 43459401, cyan 43459402, magenta 43459403 and yellow 43459404 as standard — with a high-yield 434593 series available when volume grows. Within that series, the yellow cartridge stocked here is 43459301.

The C3520's economics suit a business that prints color deliberately: invoices, letterheads and documents that face customers, while the everyday internal paperwork stays black. Its four cartridges are tracked and replaced separately, so the budget follows the work instead of a fixed all-at-once swap.

Toner Cartridges for C3520

The standard cartridges for this printer are 43459401 (black), 43459402 (cyan), 43459403 (magenta) and 43459404 (yellow). The listing above is the high-yield yellow from the 434593 series, sold for this family.

Which cartridge should you buy?

Let the black cartridge do the daily work and treat color as the considered spend. Standard cartridges cover a small business's normal mix well, replaced one at a time as each color actually empties. If the office's color volume climbs — marketing documents, charts, branded forms — the high-yield 434593 series stretches each change further, and the yellow 43459301 listed here is typically the first upgrade that pays, since presentation colors lean hardest on yellow. Keep a spare black on hand regardless; it is the cartridge that runs out first in document printing.

Chip, toner and everyday use

The C3520 tracks black, cyan, magenta and yellow independently, and each cartridge reports through its chip — so a cartridge that is not clicked fully into its slot can read as absent even when it is full. Fit cartridges one at a time and confirm the machine accepts each before moving on. Yield figures are estimates at 5% coverage, and color pages with large graphics use far more. Store the next set sealed and flat, away from heat and direct light, so the cartridges are at their best when their turn comes.

Frequently Asked Questions

Which cartridges fit the C3520?

Four individual toner cartridges — black 43459401, cyan 43459402, magenta 43459403 and yellow 43459404. Each color is replaced on its own when it runs out. The high-yield yellow 43459301 from the 434593 series is the cartridge sold on this page.

How can I keep color printing costs down on the C3520?

Print everyday internal documents in black only, so the cyan, magenta and yellow cartridges last longer, and keep a spare black cartridge on hand since it runs out first. Save full color for the documents that actually face customers.

Do I have to replace all four cartridges at the same time?

No. The C3520 tracks each cartridge separately, so a single empty color never forces you to discard the other three. Replace only the cartridge the machine reports as empty.

What is the 434593 series, and when should I switch to it?

It is the high-yield branch of this printer's cartridge family, made for offices whose volume has outgrown the standard cartridges. Switch color by color as each one starts needing frequent changes — yellow, listed here, is the usual first candidate.

More printers that use the same cartridges

This cartridge family is shared with these Oki models: MC360 MFP, MC630MFP, C3300, C3300N, C3400, C3400N, C3430N, C3530 MFP, C3530, C3530MFP, C3530N MFP, C3530N, C3600, C3600N.