HPE 851664-B21 Apollo 6000 Dual Rotor Hot Plug Fan

• Brand: HPE
• HPE Part Number: 851664-B21
• Product Name: HPE Apollo 6000 Dual Rotor Hot Plug Fan
• Product Type: Cooling Fan
• Component Category: Cooling Option
• Fan Configuration: Dual Rotor
• Hot-Plug Design: Yes
• Product Family: HPE Apollo 6000
• Supported Chassis: HPE Apollo k6000 Chassis
• Application: Apollo 6000 chassis cooling
• Required Quantity: 12 units for sufficient airflow in the Apollo k6000 chassis
• Installation Context: Apollo k6000 chassis cooling configuration
• Airflow Function: Provides chassis airflow for the supported cooling configuration
• Cooling Configuration: Can be combined with I/O blanks or PCIe I/O options
• Rear I/O Consideration: Rear I/O Blank Module Kit may be required when using Dual Rotor Fans without external PCIe slots
• Server Tray Consideration: HPE Apollo 6000 Server Tray Blank Kit is required for non-populated chassis slots to prevent thermal-related issues
• Compatibility: HPE Apollo k6000 chassis; verify exact configuration
• Procurement SKU: 851664-B21
• Related HPE Cooling Option: Apollo 6000 Server Tray Blank Kit – 870868-B21
• Related HPE I/O Option: Apollo k6000 Rear I/O Blank Module Kit – 851669-B21
• Alternative Fan Option: Apollo 6000 Quad Rotor Super Fan – 851665-B21

Why Choose This Product?

• Correct HPE part identification: 851664-B21 gives procurement teams a precise OEM reference for the required cooling component.
• Apollo 6000-specific design: Intended for the Apollo 6000 chassis family rather than generic server applications.
• Dual-rotor configuration: Clearly distinguishes this option from other HPE Apollo cooling products.
• Hot-plug design: Supports maintenance-oriented chassis deployments where hot-plug fan servicing is required.
• Quantity planning clarity: HPE's specification of 12 fans for sufficient k6000 airflow helps data center teams plan complete cooling configurations. 
• Maintenance readiness: A defined OEM part number simplifies spare-parts inventory and replacement planning.
• Reduced specification ambiguity: Buyers can match the exact fan type to the supported Apollo chassis configuration before ordering.
• Infrastructure-focused sourcing: Suitable for enterprise and data center teams maintaining Apollo 6000 chassis deployments.