Hewlett Packard
Compatible HP 645A (C9731A C9732A C9733A) Toner Cartridge 3 Color Set
- Page Yield:
- Color: 12000
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Page Yield:
- Color: 12000
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Compatible Printers
- Color LaserJet 5500
- Color LaserJet 5500dn
- Color LaserJet 5500dtn
- Color LaserJet 5500hdn
- Color LaserJet 5500n
- Color LaserJet 5550
- Color LaserJet 5550dn
- Color LaserJet 5550dtn
- Color LaserJet 5550hdn
- Color LaserJet 5550n
- LaserJet 5500
- LaserJet 5500dn
- LaserJet 5500dtn
- LaserJet 5500hdn
- LaserJet 5500n
- LaserJet 5550
- LaserJet 5550dn
- LaserJet 5550dtn
- LaserJet 5550hdn
- LaserJet 5550ni>
- i>
- HP 645A
- Specifications
- SKU:
- CS-HP-645A-3Set
- Printer Brand:
- Hewlett Packard
- OEM Number:
- C9731A C9732A C9733A
- Ink Color:
- Cyan, Magenta, Yellow
- Page Yield:
- Color: 12000
- Printer Type:
- Laser Cartridge
- Condition:
- New Compatible
- Description
- Reviews


Explore the robust and reliable printing capabilities of the HP 645A Color LaserJet Series, offering a comprehensive range of printers to meet diverse printing requirements. The Color LaserJet 5500DN, 5500DTN, 5500HDN, and 5500N models provide high-quality color printing, while the 5550DN, 5550DTN, 5550HDN, and 5550N offer enhanced performance and versatility. Experience vibrant color printing with the C9730A Black, C9731A Cyan, C9733A Magenta, and C9732A Yellow toner cartridges, compatible with the HP 645A toner cartridge and toner cartridge options. These cartridges ensure consistent and reliable print quality for a variety of printing tasks, from documents to marketing materials. Invest in a printing solution that meets your business needs with the HP 645A Color LaserJet Series, known for its exceptional performance and professional-grade results. Whether it's the Color LaserJet 5500 series or 5550 series models, these printers deliver superior print quality and reliability for all your printing needs.
Frequently Asked Questions
What exactly is inside this 3 color set?
Three cartridges: C9731A cyan, C9732A yellow and C9733A magenta — the complete color side of the 645A family in one box. Each is a full standard cartridge, the same units sold individually, gathered into a single purchase.
Why is there no black cartridge in the set?
Because the set is deliberately colors-only. Black is a separate 645A cartridge that is bought on its own schedule, and plenty of printers need their colors refreshed while black still has life in it. This set answers the color side and leaves black to you.
Is each color rated the same?
Yes — each of the three is rated at 12,000 pages. That does not mean they will empty on the same day: real consumption follows the colors your documents actually use, so treat the shared rating as a common starting line, not a synchronised finish.
When does replacing all three colors at once make sense?
Three moments stand out: setting up a machine for color work, reviving one that has printed mostly black for a long stretch, and clearing the decks before a big color project so no cartridge is the weak link mid-run.
Which printers does this set serve?
The 645A color family fits the Color LaserJet 5500 and 5550 series. If your machine's outgoing cartridges carry the C9731A, C9732A and C9733A codes, this set is their combined replacement.
What warranty and returns apply to the set?
The set carries a 1-year warranty with 1-year free returns. It ships from our warehouses in Illinois, Pennsylvania, Georgia and California, our support team works Monday through Friday, 9 AM to 5 PM CST, and the shipping and returns page explains the rest.
About This 645A 3 Color Set
At $462.81, this set brings together the three color cartridges of the 645A family for the HP Color LaserJet 5500 and its 5550 relatives: cyan, yellow and magenta, each rated at 12,000 pages, refreshed in a single visit to the machine. It is the tidy option for offices that would rather reset the whole color system at once than chase three separate low-supply warnings across three separate weeks.

