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Original HP 777 DesignJet Printhead (3EE09A)
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Universal high-definition thermal inkjet printhead with dual drop-weight HDNA technology for HP DesignJet Z6 Pro and Z9+ Pro 64-inch engines.
OEM Replacement Component
Original HP 777 DesignJet Printhead (3EE09A)
OEM Part Number: 3EE09A (HP No. 777) | High-Definition Nozzle Architecture (HDNA) Universal Dual-Channel Printhead
Product Overview
The Original HP 777 DesignJet Printhead (3EE09A) is an authentic original equipment manufacturer dual-channel thermal drop-on-demand (DoD) inkjet printhead engineered specifically for HP's flagship industrial production platforms: the HP DesignJet Z6 Pro 64-in and HP DesignJet Z9+ Pro 64-in Printers. Powered by HP’s premier High-Definition Nozzle Architecture (HDNA), the 3EE09A functions as a universal, slot-independent printhead engine. A single SKU services all carriage slots across both 6-color and 9-color industrial production engines, dynamically self-configuring and locking to its assigned color channel pair upon installation and fluidic priming.
Engineered with true 2400 nozzles-per-inch (npi) dual-row density and dual-drop weight technology, the HP 777 printhead fires micro-droplets as small as 3 picoliters (pL) alongside 7 picoliters (pL) high-density drops, delivering aggregate firing frequencies up to 76 million drops per second. This HDNA dual-drop configuration renders high-contrast, grain-free photo highlights and smooth continuous tones without requiring traditional dilute light inks (such as Light Cyan or Light Magenta). Integrated with HP Smart Printing Technology and an onboard cryptographic EEPROM, the printhead continuously monitors thermal characteristics and coordinates with the printer's optical drop sensor (ODS) to execute real-time nozzle health validation and dynamic defect substitution.
Part Information
| Product Name | Original HP 777 DesignJet Printhead |
| OEM Manufacturer | HP Inc. (Hewlett-Packard) |
| OEM Part Number | 3EE09A (HP No. 777) |
| Component Classification | Universal Dual-Channel HDNA Thermal Inkjet Replacement Head |
| Slot Versatility & Keying | Universal: Self-configures to any slot pair (e.g., MK/CR, M/Y, PK/C, G/CG, or Gloss/Chromatic) |
| Ink Chemistry Pairing | HP 775 / HP 776 Vivid Photo Pigment Inks |
| Manufacturing Standard | Genuine HP Factory Original Sealed Package (Singapore) |
Technical Specifications
| Print Technology | HP High-Definition Nozzle Architecture (HDNA) / Thermal Inkjet |
| Total Active Addressable Nozzles | 2,112 nozzles per printhead (1,056 nozzles per channel across dual interleaved arrays) |
| Native Channel Resolution | 1200 nozzles per inch (npi) per row (2400 npi combined effective dual-row density) |
| Maximum Output Resolution | Up to 2400 × 1200 optimized DPI |
| Calibrated Base Drop Volume | HDNA Dual-Drop Weight: 3 picoliters (pL) small drop & 7 picoliters (pL) high-density drop |
| Swath Width per Pass | 21.6 mm (0.85 inches) |
| Smart Chip Integration | Onboard cryptographic EEPROM for dynamic thermal voltage compensation, drop logging, and auto-slot assignment |
| Operating Temperature Range | 5°C to 40°C (41°F to 104°F) |
| Storage Temperature Range | -25°C to 55°C (-13°F to 131°F) in factory-sealed state |
| Operating Humidity Range | 20% to 80% RH non-condensing |
| Physical Dimensions & Weight | 146.8 × 131.4 × 27.7 mm; Net: 82 g / Gross: 107 g (packaged) |
Key Features & Operational Advantages
- Universal Industrial Architecture: A single SKU (3EE09A) replaces any failed printhead position across both the HP DesignJet Z6 Pro (3 heads) and Z9+ Pro (5 heads) 64-inch industrial engines, dramatically streamlining spare parts inventory and reducing operational overhead.
- High-Definition Nozzle Architecture (HDNA): Combines 3 pL and 7 pL dual-drop weight jetting at 2400 npi density to yield continuous-tone photographic quality, sharp vector acutance, and high line precision without requiring dilute light inks.
- Industrial High-Speed Throughput: Built to endure sustained high-velocity carriage sweeps across large-format 64-inch media, sustaining uniform droplet trajectory and ink volume during high-volume production schedules.
- Active Optical Drop Detection (ODS): Interacts continuously with the carriage sensor to scan nozzle health during production, dynamically substituting adjacent operational channels to eliminate horizontal banding without interrupting printing.
CRITICAL TECHNICAL & OPERATIONAL ADVISORY
1. Universal Slot Initialization & Locking: While the HP 777 printhead is physically universal and can be placed into any open slot in a Z6 Pro or Z9+ Pro carriage, once it is seated, latched, and charged with ink, its internal micro-fluidic chambers and cryptographic EEPROM lock to that specific color pair. A used head cannot be moved to a different slot position without causing irreversible cross-color contamination.
2. Platform Differentiation from HP 746 (P2V25A): Although both the HP 777 (3EE09A) and HP 746 (P2V25A) utilize HDNA universal printhead technology, the HP 777 is configured with distinct carriage communication firmware and thermal pulse timing optimized specifically for 64-inch "Pro" series chassis (Z6 Pro / Z9+ Pro) running HP 775/776 ink systems. They are not interchangeable with standard Z6/Z9+ 24-in and 44-in plotters.
3. Electrical Contact Pad Care: Never touch the gold rear contact array or the lower silicon nozzle plate with bare fingers. Finger oils and electrostatic discharge (ESD) can cause smart chip recognition errors or open-circuit faults. If contaminated, clean the pads gently using a lint-free cleanroom wipe lightly dampened with deionized water.
4. Packaging & Expiration Management: Keep the printhead sealed in its protective foil blister pack until immediately prior to physical installation to prevent nozzle dehydration. Check the "Install By" date on the packaging carton to ensure proper fluid wetting and actuator responsiveness.
Compatible Models & Systems
| Printer Series | Ink Chemistry | Supported Platforms |
|---|---|---|
| HP DesignJet Z6 Pro 64-in | HP 775 Vivid Photo Pigment | DesignJet Z6 Pro 64-in Large-Format Production Printer (2QU25A) |
| HP DesignJet Z9+ Pro 64-in | HP 776 Vivid Photo Pigment | DesignJet Z9+ Pro 64-in Large-Format Production Printer (2RM82A) |
*Model Differentiation Note: The HP 777 printhead (3EE09A) is engineered strictly for HP DesignJet Z6 Pro and Z9+ Pro 64-inch industrial engines. It is incompatible with previous-generation industrial photo printers (Z6200, Z6600, Z6800, Z6610, Z6810 using HP 771, HP 773, or HP 774 heads) as well as the standard 24-in and 44-in Z6/Z9+ series (which require HP 746 printheads). Always verify your plotter chassis specification before breaking the factory package seal.
Terms, Warranty & Customer Protection
Condition: 100% Brand New, Genuine OEM Factory-Original HP Replacement Printhead sealed in official packaging with factory storage fluid intact.
HP Manufacturer Warranty: Covered under HP's genuine parts limited warranty against materials and workmanship defects until the "Warranty Ends" date printed on the exterior carton, or until the factory-rated ink throughput threshold is reached, whichever comes first.
Return Policy: Precision electronic consumable component. Unopened, factory-sealed boxes are eligible for standard commercial return. Once the protective blister seal is opened, the orange protective shipping cap removed, or the head seated into the carriage and charged with ink, returns cannot be accepted due to smart chip activation, fluid priming, and cross-contamination risks.
3EE09A
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