Overview
The Dell 0CM740 is an OEM 3.5″ hard drive caddy fan assembly designed for Dell OptiPlex and Dimension small form factor systems. This Dell 0CM740 caddy combines a black hard drive bracket with an integrated cooling fan to maintain optimal hard drive temperatures. It features straightforward plug-and-play installation with standard SATA and molex connectors, making it an ideal drop-in replacement for older Dell systems requiring additional cooling or caddy replacement.
Key Features
- Integrated Fan Cooling: Built-in fan assembly actively cools the hard drive, reducing thermal strain on legacy storage
- Genuine OEM Part: Original Dell component with verified compatibility across multiple system generations
- Tool-Free Installation: Snap-fit design with no screws required for mounting; standard connectors ensure quick replacement
- 3.5″ Hard Drive Support: Holds standard 3.5-inch SATA hard drives securely in place
- 5-Pin Molex Connection: Compatible with standard PC power connectors for fan operation
Technical Specifications
- Form Factor: 3.5″ HDD caddy with fan assembly
- Connector Types: SATA power/data, 5-pin molex fan connector
- Mounting: Snap-fit design, tool-free installation
- Compatible Drive Size: 3.5″ hard drives
- Fan Type: Integrated cooling fan (5-pin molex)
- Part Number: CN-0CM740-73308-0CB-03DC-A00 (0CM740)
Typical Applications
- OptiPlex 740, 745, 755, 760, and 780 SFF system upgrades and repairs
- Dell Dimension 5100C and 9200 series hard drive caddy replacement
- Legacy Dell XPS 210 system maintenance
- Thermal management improvements for aging hard drives in small form factor enclosures
- Emergency caddy replacement in systems where original caddy is damaged or non-functional
Compatibility & Replacements
Compatible With
- Dell OptiPlex 740 (SFF)
- Dell OptiPlex 745 (SFF)
- Dell OptiPlex 755 (SFF)
- Dell OptiPlex 760 (SFF)
- Dell OptiPlex 780 (SFF)
- Dell Dimension 5100C
- Dell Dimension 9200 / 9200c
- Dell XPS 210
- Dell OptiPlex 380 (verified by end-users)
Replaces / Drop-In Replacement For
- Dell OEM part number 0CM740
- Dell OEM part number 0NY290
- Dell OEM part number 0NH645
- Dell caddy assemblies from equivalent-generation OptiPlex SFF platforms
Works With
- Standard SATA hard drives (3.5″ form factor)
- SATA data cables (standard IDE/SATA spec)
- ATX and proprietary Dell PSU molex connectors
- Legacy Dell BIOS and firmware (no driver installation required)



