HP 640A Toner Cartridges

The Color LaserJet 4500 and 4550 were early-2000s color workhorses, and the HP 640A set (HP C4191A through C4194A) is the four-cartridge family those printers take — black plus the three color cartridges, engineered for the machines' separate-cartridge print system. These printers still turn up in warehouses, print rooms, and legacy workflows where replacing the whole fleet is not on the budget, and fresh toner is what keeps their color output respectable. Because each color is its own cartridge, you only replace what runs out, which suits the 4500/4550's famously long service life. Clever Supplies lists both genuine OEM HP 640A cartridges and compatible equivalents on this page, so a machine old enough to vote can still print like it means business.

Works with these HP printers

• Color LaserJet 4500
• Color LaserJet 4500D
• Color LaserJet 4500DN
• Color LaserJet 4500HDN
• Color LaserJet 4500N
• Color LaserJet 4550
• Color LaserJet 4550DN
• Color LaserJet 4550HDN
• Color LaserJet 4550N

Frequently Asked Questions

How do I verify my printer uses HP 640A cartridges?

Check the model — the Color LaserJet 4500 and 4550 series (including DN, N, and HDN variants) take the 640A family. The part numbers on your installed cartridges should read C4191A through C4194A.

Are compatible 640A cartridges a good idea for a legacy printer?

They are often the best option — compatible cartridges cost a fraction of OEM, which matters when the printer itself is long paid off. Quality from reputable suppliers matches OEM closely enough for business documents.

Can I replace just one color in the 640A set?

Yes — each of the four cartridges is independent, so you only replace the color that is empty. That is a real advantage of the 4500/4550 design: no paying for color you have not used.