Hewlett Packard
Compatible HP 5550dtn (C9730A) Toner Cartridge Black
- Page Yield:
- Black: 13000
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Page Yield:
- Black: 13000
- 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:
- CLS-HP-5550dtn-BK
- Printer Brand:
- Hewlett Packard
- OEM Number:
- C9730A
- Ink Color:
- Black
- Page Yield:
- Black: 13000
- 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 identifies this as the black for my 5550dtn?
The part number C9730A. It is the black cartridge of the HP 645A family, and it corresponds to the code on the unit installed in your machine. One cartridge is included here, at $166.60.
Which jobs empty the black first on a multi-tray machine?
The long ones. Statement runs, report sets and form batches pulled from the extra trays are overwhelmingly black text, so they — not the occasional color page — set the pace at which this cartridge is consumed.
What is the cartridge's rated yield?
13,000 pages at standard coverage. On a dtn working mixed letter and ledger stock, that figure is the right planning basis, with heavily covered pages counting for more than one standard page in practice.
Does the extra tray change anything about fitting the cartridge?
Nothing at all. Trays are paper handling; the cartridge swap is the same simple slide-out, slide-in at the front of the machine, and every tray and duplex setting survives the change untouched.
Can the same cartridge serve both letter and ledger work?
Yes — one black cartridge feeds every tray and every paper size the printer supports. There is no separate cartridge for large-format work; the dtn draws on the same C9730A whatever the job.
What backing do I get with this purchase?
Support is available Monday–Friday, 9 AM–5 PM CST if questions come up after fitting. The cartridge is covered by a 1-year warranty and 1-year free returns, with the procedure described on the shipping & returns page.
About This C9730A for the Color LaserJet 5550dtn
With duplexing and extra trays, the Color LaserJet 5550dtn is set up for mixed-size, high-throughput work, and nearly all of that throughput is black. This C9730A cartridge, rated at 13,000 pages, is built to be the workhorse consumable behind it.
Orders leave from the IL, PA, GA or CA warehouse nearest the delivery address. Further HP cartridges for this machine are stocked in the same store.

