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Rectangular HP 728 magenta ink cartridge with matte plastic body and label

HP

HP 728 F9J66A 300 ml Magenta ink cartridge

SKU CH-YZ5V-DDPPB MPN F9J66A

High-capacity 300 ml magenta dye-based ink cartridge for HP DesignJet T730 and T830 series printers

  • Cartridges includedSingle Pack
  • Ink or toner colorMagenta
  • Ink droplet size6 pl
  • Ink or cartridge typeDye-based
  • Operating humidity range20 to 80% RH
  • Storage humidity range20 to 80% RH
  • Crisp, accurate prints for CAD and general-purpose work from Original HP dye-based ink
  • High-capacity 300 ml cartridge enables long unattended printing runs
  • Designed as an optimized system with HP DesignJet T730 and T830 series printers
  • Consistent professional results print after print with 6 pl ink drop size
  • Reliable operation across 20 to 80% humidity and 41 to 104°F temperature range

HP 728 300 ml Magenta Cartridge

This genuine HP 728 cartridge supplies 300 ml of magenta dye-based ink for HP DesignJet T730 and T830 series printers. It is aimed at design and engineering workgroups that produce CAD and general-purpose prints and want high-capacity supplies for longer unattended runs.

Compatibility Check Before Ordering

Verify that your printer is an HP DesignJet T730 or T830 series model, as this cartridge is built for those devices. Ensure the operating environment stays within 41 to 104°F and 20 to 80% relative humidity, and store spares between -13 and 131°F at the same humidity range.

Build and Daily Use

The single-pack cartridge uses a 6 pl ink drop size to deliver crisp, clear output on technical documents. High-capacity 300 ml volume reduces the frequency of replacements, helping to keep production moving with fewer interruptions during heavy print workloads.

How it compares

Measured against everything we stock in OEM Ink Cartridges, at today’s prices. Recalculated every night.

Price $104.99
Pricier than about 70% of the 1,504 comparable items (median $60.99).

Specifications

Product
Brand nameHP
Product lineHP 728
Part numberF9J66A
Ink or toner colorMagenta
Performance
Ink droplet size6 pl
Size & build
Shipping weight0.25 kg
Package size175 × 86 × 46 mm
Compatibility
Replacement forHP
In the box
Cartridges includedSingle Pack
Environment & compliance
Operating humidity range20 to 80% RH
Storage humidity range20 to 80% RH
Operating temperature range41 to 104 °F (5 to 40 °C)
Storage temperature range-13 to 131 °F (-25 to 55 °C)
More details
Ink or cartridge typeDye-based

Questions about this item

What comes inside the F9J66A box and what must be purchased separately?

The box contains one new HP 728 magenta ink cartridge filled with 300 ml of dye-based ink. The printer itself — such as the HP DesignJet T730 or T830 series — is sold separately.

Should I choose the 300 ml cartridge or one of the smaller sizes?

The 300 ml cartridge is the highest capacity in the HP 728 range and is intended for workgroups that want long unattended print runs; smaller 40 ml to 130 ml cartridges exist for lighter workloads.

How many prints can I expect from the 300 ml volume in a DesignJet T830?

HP does not publish a page-yield figure for this cartridge; the 300 ml volume simply provides more ink for extended printing between replacements in compatible DesignJet models.

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