HP Color LaserJet 5550N Toner Cartridges

COLOR LASERJET 5550N

The HP Color LaserJet 5550N put improved wide-format color on the office network: workgroups shared large-page output from one dependable machine. Toner is HP 645A — C9730A black plus cyan C9731A, yellow C9732A and magenta C9733A. Every cartridge in the family is listed on this page.

The N model is the networked entry to the 5550 line: the improved color engine, shared by a workgroup, without the duplexer of the DN. For teams whose A3 work was presentations, charts and the occasional poster rather than bound reports, it was the right-sized machine — and a generation of them is still in service.

Toner Cartridges for COLOR LASERJET 5550N

Cartridge	Color	Page Yield
645A 4 Color Set (C9730A, C9731A, C9732A, C9733A)	Black, cyan, yellow and magenta	See product page
C9730A	Black	See product page
C9731A	Cyan	See product page
C9732A	Yellow	See product page
C9733A	Magenta	See product page
4 Color Set (C9730A, C9731A, C9732A, C9733A)	Black, cyan, yellow and magenta	See product page
C9730A	Black	See product page
C9733A	Magenta	See product page
645A 3 Color Set (C9731A, C9732A, C9733A)	Cyan, yellow and magenta	See product page
642A (C9733A)	Magenta	See product page

The same shelf also carries listings labeled for the sibling models in this family — the cartridges are the same, and each listing below is the one it names:

Which cartridge should you buy?

A workgroup printer's toner tells the story of the team's work: black drains steadily with everyday documents, while colors go in project-shaped bursts. Stock for both rhythms. The C9730A multi-black listings cover the steady drain without repeated ordering. The color singles C9731A, C9732A and C9733A cover the bursts — one project color at a time, replaced only when it empties. When a team's output starts looking tired across the board, the 4 Color Set renews the family in one visit; the 3 Color Set does the colors alone. The cheapest cartridge strategy for a shared printer is simply never letting it sit empty while a job waits.

Chip, toner and everyday use

Leave a shared printer the way you would want to find it: new cartridge seated and recognized, levels checked, and a note if a reserve was used up. A cartridge that has waited on a shelf prints best after a gentle end-to-end rock levels the toner inside. Keep spares sealed and flat, stored in the room where the printer lives rather than a distant stockroom. If the panel questions a cartridge, reseat it once and confirm the code belongs to the 645A family before ordering a replacement you may not need.