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Icy Dock

3-Bay 3.5” SAS/SATA HDD Tray-less Enclosure Cage

The FlexCage MB973SP-1B, a hot-swappable 3 bay tray-less backplane cage for 3.5” SAS / SATA hard drives. This is a commercially designed product in the FlexCage series for use in workstation or server environments, such as ATX towers or rackmounts. This FlexCage incorporates the best technologies to meet those demands, with second to none fit, function, and reliability.
Space Saving & Tray-less Design
The FlexCage MB973SP-1B has been designed to maximize space use by allowing up to 3 x 3.5” SAS / SATA hard drives, while only consuming two external 5.25” drive bays. The FlexCage also only requires two 4-pin power ports (or two 15-pin power ports with included 4 pin to 15 pin adapter cables), to power up to three 3.5” hard drives. In order to further the convenience of the FlexCage, our renowned tray-less technology is integrated into the cage -- no screws or tools are required to add or remove the drives, making hot swapping a completely hassle free experience. However, because of the tray-less technology used, maintenance becomes dramatically reduced to simply ejecting a failed drive, and then reinserting the replacement.
Flexible Cooling
The MB973SP-1B uses a large 80mm cooling fan to pull cool air from the front ventilation slots, over the drives, and exhaust the warm air out through the rear ventilation slots. The FlexCage also features the Active Power Technology power system, so that the fan used and the individual LED are only powered on if a drive is inserted. The included 80mm cooling fan also can be easily replaced and maintained, as the unit is fully removable and replaceable with most aftermarket cooling fans of the same size. To expand the range of compatible fans, both 2 and 3 pin standard fan power ports are available and can be easily accessed.
Workstation and Server Ready
The FlexCage uses our Flex Fit Design, which accommodates to different tab lengths when installing to a rackmount chassis or ATX tower case. This will help reduce the build time, and also adds greater compatibility for different system builds. In addition, for systems that use 15 power connectors exclusively, and so 4 to 15 pin power adapter cables are included to provide better accessibility for various host systems. Each bay includes individual LED indicators, displaying both drive power and activity. This is to provide drive status information at all times. Similarly, each drive door has a multi-locking latch mechanism to prevent a door from being opened easily. For best durability, a solid aluminum panel is used in each of the door latch, making it an ideal solution for systems where IT and non-IT personnel may have access.

Product Specifications:

Icy Dock Part Number

  • MB482SP-3B


  • Black


  • Aluminum|Plastic

Security Slot

  • No


  • (3) 3.5-inch


  • External power supply

Hot Swappable

  • Yes


  • (1) 80mm cooling fan


  • Environmental (Operating)
    • Temperature (°F) 41° — 107°
    • Temperature (°C) 5° — 42°
  • Environmental (Non-Operating)
    • Temperature (°F) −40° — 149°
    • Temperature (°C) −40° — 65°


  • Height: 8.5 cm (3.3 in)
  • Width: 14.8 cm (5.8 in)
  • Length: 21.0 cm (8.3 in)


  • 821 g (1.81 lbs)


  • Varies depending on drive mechanism installed
Manufacturer provided specifications for Icy Dock p/n MB973SP-1B UPC#: 884826001959



  • (1) Icy Dock FlexCage 3-Bay HDD Tray-less Enclosure Cage
  • (8) M3*6 screws
  • (2) 4 Pin to 15 Pin Power Connector
  • (1) User Manual
Icy Dock FlexCage 3-Bay 3.5” SAS/SATA HDD Tray-less Enclosure Cage Mfr P/N: MB973SP-1B OWC SKU: ICDMB973SP1B Features a tray-less design for tool-less installation. Supports SATA III 6Gb/s transfer rate and SAS channel IcyDock 3 Year Limited Warranty
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