Safe checkout
Secure payments
Fast dispatch
1–2 day handling
Free shipping
U.S. ground
Warranty & RMA
Support after delivery
Dell MH3940MH394 Optiplex 580 740 745 755 760 780 HD Caddy MH394 0MH394 CN-0MH394
- 2.5-inch to 3.5-inch Hard Drive Caddy
- Compatible with Dell Optiplex 580, 740, 745, 755, 760, 780
- Part Numbers: MH394, 0MH394, CN-0MH394
- Allows installation of 2.5-inch drives (HDD/SSD)
- Replaces standard 3.5-inch drive bays
- Ensures secure mounting of the drive
MH3940MH394 isn't on our shelf today — we source it to order. Request a quote and we'll confirm price and lead time within one business day.
Key specifications
See full specs ↓- Product Type
- Hard Drive Caddy / Bracket
- Drive Size Supported
- 2.5-inch
- Bay Size Replaced
- 3.5-inch
- Compatibility
- Dell Optiplex 580, 740, 745, 755, 760, 780
- Interface
- SATA/SAS (drive dependent)
- Material
- Metal/Plastic
Product details
The Dell MH3940MH394 is a hard drive caddy (also known as a drive bay adapter or bracket) for various Dell Optiplex desktop models. It allows for the installation of a 2.5-inch SATA or SAS hard drive or SSD into a 3.5-inch drive bay.
Technical Information
| Product Type | Hard Drive Caddy / Bracket |
| Drive Size Supported | 2.5-inch |
| Bay Size Replaced | 3.5-inch |
Additional Specifications
| Compatibility | Dell Optiplex 580, 740, 745, 755, 760, 780 |
| Interface | SATA/SAS (drive dependent) |
| Material | Metal/Plastic |
Description
The Dell MH3940MH394 is a crucial component for upgrading or expanding storage in compatible Dell Optiplex desktop computers. This hard drive caddy acts as an adapter, enabling users to install a smaller 2.5-inch Solid State Drive (SSD) or Hard Disk Drive (HDD) into a bay designed for a larger 3.5-inch drive. This is particularly useful when upgrading older systems to SSDs for significant performance improvements, as SSDs are typically manufactured in the 2.5-inch form factor. The caddy is designed to fit securely within the 3.5-inch drive bay of specific Dell Optiplex models, including the 580, 740, 745, 755, 760, and 780. It provides the necessary mounting points and screw holes to ensure the 2.5-inch drive is held firmly in place, preventing vibration and ensuring reliable data transfer. The part numbers associated with this caddy, MH394, 0MH394, and CN-0MH394, confirm its authenticity and compatibility with these Dell systems. Installation is straightforward, typically involving securing the 2.5-inch drive to the caddy using screws, and then mounting the caddy into the computer's 3.5-inch drive bay. This adapter facilitates the use of modern, high-speed storage solutions in older hardware, extending the lifespan and enhancing the performance of the Optiplex desktops. It's an essential accessory for anyone looking to upgrade their system's storage capacity or speed.
Condition: Refurbished
Free U.S. ground shipping
Typically 1–2 days handling, 3–7 days in transit.
Purchase orders accepted
Government, enterprise, data center and small business.
Buying 10+ units?
Get volume pricing and availability for MH3940MH394.




