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Rectangular cyan toner cartridge in HP branded box

HP

HP C9731A 645A Cyan Toner Cartridge 12000 Pages

SKU CH-J2NK-WMASD MPN C9731A

Cyan toner cartridge for HP LaserJet 5500 and 5550 series printers, yielding approximately 12000 pages

  • Cartridge QuantitySingle Pack
  • Cartridge ColorCyan
  • Replacement ModelHP
  • Compatible ProductsHP Color LaserJet 5500, 5500dn, 5500dtn, 5500hdn, 5500n, 555
  • Approximate Page Yield12000 Pages
  • Coverage5%
  • ~12,000 pages per cartridge for high-volume printing
  • Cyan toner produces sharp, professional colour output
  • Genuine HP cartridge ensures reliable, consistent performance
  • Smart printing technology gives automatic alerts and easy ordering
  • Compatible with HP LaserJet 5500 and 5550 series printers

HP 645A Cyan Toner for LaserJet 5500/5550

This genuine HP C9731A cyan toner cartridge delivers approximately 12000 pages at 5% coverage. It is designed for the HP Color LaserJet 5500 and 5550 series printers. Offices and workgroups needing reliable, professional colour output for everyday documents will find this single-pack cartridge matches the printer’s rated speed and quality.

Installation and common issues

The cartridge uses HP’s Smart printing technology and all-in-one architecture for straightforward front-access replacement; the printer provides automatic alerts when toner runs low. Problems usually arise only if the cartridge is installed in a non-listed model or if the printer firmware does not recognise the genuine chip, which can stop printing until the correct supply is fitted.

Yield and environmental limits

The 12000-page yield assumes continuous printing at 5% coverage; heavy graphics or frequent short jobs will reduce the actual page count. Reliable operation requires an environment of 59 to 77°F and 20 to 80% relative humidity, while storage limits are -4 to 104°F and 10 to 90% humidity. Buyers who need higher capacity or a different colour must select a separate cartridge.

Highlights

  • ~12,000 pages per cartridge for high-volume printing
  • Cyan toner produces sharp, professional colour output
  • Genuine HP cartridge ensures reliable, consistent performance
  • Smart printing technology gives automatic alerts and easy ordering
  • Compatible with HP LaserJet 5500 and 5550 series printers

Specifications

BrandHP
ModelHP C9731A (645A)
Part NumberC9731A
Cartridge QuantitySingle Pack
Cartridge ColorCyan
Replacement ModelHP
Compatible ProductsHP Color LaserJet 5500, 5500dn, 5500dtn, 5500hdn, 5500n, 5550, 5550dn, 5550dtn, 5550hdn, 5550n
Approximate Page Yield12000 Pages
Coverage5%
Operating Humidity20 to 80% RH
Storage Humidity10 to 90% RH
Operating Temperature59 to 77°F
Storage Temperature-4 to 104°F
FeaturesAdvanced toner formulation for crisp, sharp output every time.
Easy to use and maintain with new print cartridge architecture and Smart printing technology.
Cost-effective color solution for everyday use.
Smart printing technology enables supplies status and usage information, HP SureSupply ordering, shake-free cartridge, dynamic EP adjustments and cartridge installation assurance.
Shipping weight2.90 kg
Package size500 × 264 × 160 mm

Other versions of this model

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Questions about this item

How can I verify the cartridge is printing correctly after installing it in my HP LaserJet 5550?

The printer will run its automatic calibration cycle and the on-screen supply status should show the new cyan cartridge at full level with no error messages.

What comes in the box and do I need to purchase any additional components?

The single pack contains one HP C9731A cyan toner cartridge only; no drum unit, waste bottle or other consumables are included or required.

Which cartridge version should I choose for an HP Color LaserJet 5500dn?

Select the HP 645A cyan cartridge (part number C9731A) rated for approximately 12000 pages at 5% coverage.

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