L21471-001 L31402-001 - SATA HDD Cooling Fan for EliteDesk 705 G4 705 G5 800 G4 800 G5 Mini PC
Compact 5V auxiliary cooling fan for the 2.5-inch SATA hard-drive or solid-state-drive area in compatible EliteDesk Desktop Mini systems. This chassis-specific fan mounts beneath or alongside the SATA drive-cage area and connects to the matching 4-pin auxiliary fan header to move air across the installed drive and surrounding components. It is not the larger main processor cooling fan.
Technical Specifications
- Primary Part Number: L21471-001
- Product Type: SATA HDD cooling fan assembly
- Alternate Service Part Number: L31402-001
- Fan Type: Compact internal auxiliary blower fan
- Cooling Application: 2.5-inch SATA HDD / SSD and drive-cage area
- Rated Voltage: 5V DC
- Rated Current: 0.5A
- Rated Input Power: 2.5W
- Connector: 4-pin chassis-specific power and control connector
- Installation Type: Internal drive-cage / chassis mounting
- Compatible Form Factor: Desktop Mini / Mini PC
- Housing Color: Black
- Quantity Included: One cooling fan assembly
- Not Included: 2.5-inch drive, SATA cable, drive caddy, mounting screws, processor heatsink, or thermal paste unless specifically shown or stated in the listing
Interchangeable / Replacement Part Numbers
L21471-001, L31402-001, DFS150305BD0T-FL3F, FCN4CF84FATP003C
L21471-001 and L31402-001 are service assembly numbers. The remaining references are common matching fan-manufacturer or physical-label numbers found on compatible 5V 0.5A four-pin revisions. Manufacturer and label can vary, so match the complete connector, cable length, wire order, housing, airflow opening, and mounting-tab pattern to the original fan before installation. The DFS150305BD0T base family also exists in different connector revisions; the base number alone does not establish compatibility.
⭐ Recommended Thermal Paste
If the processor heatsink is also being removed during the same service, use Shin-Etsu G751 High Performance Thermal Grease to renew the thermal interface between the processor and heatsink.
Thermal paste is not applied to this auxiliary SATA drive fan and is not required for a fan-only replacement.
✅ Confirmed Compatibility
Please note that the following list is not exhaustive. Verify the original fan part number, 4-pin connector, cable length, mounting points, drive-cage layout, and Desktop Mini chassis before installation. This fan is not intended for similarly named Small Form Factor or Tower systems.
✔️ EliteDesk 705 Desktop Mini Models: EliteDesk 705 G4 Desktop Mini, EliteDesk 705 G5 Desktop Mini
✔️ EliteDesk 800 Desktop Mini Models: EliteDesk 800 G4 Desktop Mini, EliteDesk 800 G5 Desktop Mini
☑️ Key Features
- ☑️ Auxiliary cooling fan designed for the 2.5-inch SATA drive and drive-cage area
- ☑️ 5V DC 0.5A electrical rating with 2.5W nominal input power
- ☑️ Chassis-specific four-pin connector for compatible Desktop Mini systems
- ☑️ Helps move air across a compact internal SATA HDD or SSD installation
- ☑️ Direct-fit mounting design when the original service number, connector, cable, and mounting pattern match
- ☑️ Cross-referenced to L31402-001 and multiple compatible physical fan-label numbers
- ☑️ Suitable for replacing a seized, noisy, intermittent, damaged, or missing auxiliary drive fan
- ☑️ Clearly identified as the auxiliary SATA drive fan rather than the main processor cooling fan
⚙️ Fit Notes
- Match L21471-001 or L31402-001 to the original service label whenever possible.
- Confirm the original fan is rated for 5V DC and uses the same four-pin connector; visually similar fans can use a different plug, pin count, wire order, or cable length.
- Match the complete DFS150305BD0T suffix when using a fan-manufacturer label. Later revisions with a different suffix or five-pin connection are not direct substitutes.
- Compare the housing shape, airflow opening, mounting tabs, screw locations, lead routing, and connector orientation before ordering.
- Compatibility is for Desktop Mini / Mini PC chassis only. Do not use this page to select a fan for a Small Form Factor or Tower chassis.
- This is the auxiliary SATA drive-cooling fan. It does not replace the main processor fan or the processor heatsink assembly.
- Systems configured without a 2.5-inch SATA drive cage may not contain or require this auxiliary fan; inspect the system configuration before ordering.
- The fan-only assembly does not include a SATA drive cable, drive caddy, 2.5-inch drive, or mounting screws unless those items are specifically shown or stated in the listing.
- Thermal paste is not used on this fan. Apply fresh thermal compound only if the processor heatsink is separately removed during service.
