HP 645A

HP 645A Toner Cartridges

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Tonerandinkjetstore.com provides high quality compatible & OEM printer cartridges & supplies for the HP 645A Toner. Our compatible HP C9730A, C9731A, C9732A, C9733A toner cartridges are guaranteed to meet or exceed the factory cartridge specifications, and are backed by our Lifetime Cartridge Warranty. We also carry a full line of OEM cartridges backed the original manufacturers one year warranty.

Built for bigger machines, the HP 645A family feeds HP's Color LaserJet 5500 and 5550 series — printers made for departments, not desks. Models like the 5500dn, the 5550dtn, and the 5550hdn all take these same cartridges, which makes fleet management refreshingly simple. A complete set is four cartridges: black plus the three color cartridges, each one a substantial unit sized for high-volume output. This family comes in a single standard capacity with no high-yield X option, reflecting an era when one generous size covered the need. Clever Supplies stocks the 645A line as genuine HP originals and compatible replacements, giving high-volume offices a real choice on running costs. When a 5500 or 5550 is the backbone of your printing, these are the supplies it runs on.

Works with these HP printers

Frequently Asked Questions

How do I verify HP 645A cartridges fit my large-format HP printer?

These are big, fast office printers, so double-check both the cartridge number 645A and your printer model against the list below. The 645A family fits only the Color LaserJet 5500 and 5550 series. If your printer is one of those and the number matches, the cartridge will fit.

Are compatible HP 645A cartridges a good idea for office printers?

Genuine HP 645A cartridges are HP-made with HP's warranty behind them. Compatible 645A cartridges are produced by third-party manufacturers for the same 5500 and 5550 machines at a lower price. On printers this size, running costs matter a lot, which is why many buyers evaluate compatibles seriously for everyday output while keeping genuine on hand for critical jobs.

Can I buy the full HP 645A set, or must I order each color separately?

Each 645A cartridge is independent, so replace only the colors that are empty. Full four-cartridge sets are a convenient way to restock a busy 5500 or 5550 all at once, and they usually work out cheaper per cartridge than buying each color separately.