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Black metal and plastic 3.5in SATA drive enclosure with USB 3.0 and eSATA ports, trayless design

STARTECH

STARTECH S351BMU33ET 3.5in SATA drive enclosure USB 3.0 eSATA trayless

SKU CH-42EE-YY23A MPN S351BMU33ET

Holds one 3.5" SATA drive and connects via USB 3.0 or eSATA with trayless hot-swap

  • Size3.5 in (8.89 cm)
  • Drive interface1 x SATA Data & Power Combo (7+15 pin)
  • External connection1 x eSATA (7 pin, Data) Female 1 x USB Type-B (9 pin) USB 3.
  • Bay count1
  • Power detailsInput Current : 0.8A Input Voltage : 100 to 240 AC Output Cu
  • Supported operating systemsNo software or drivers required
  • Hot-swap 3.5-inch SATA drives without tools via trayless design
  • Connect through USB 3.0 or eSATA for flexible host compatibility
  • Steel and aluminium construction dissipates heat for reliable operation
  • Supports drives up to 10 TB tested at 7200 RPM
  • Plug-and-play with no drivers required on Mac or PC

Single-bay 3.5in SATA enclosure

The StarTech S351BMU33ET is a trayless metal enclosure that holds one 3.5in SATA hard drive or SSD. It connects to a host computer through either a USB 3.0 Type-B port or an eSATA port, delivering up to 6 Gbps over SATA and 5 Gbps over USB. An external 12 V 2 A power adapter is included and no drivers are required for Windows, macOS or Linux.

Suits users who hot-swap 3.5in drives between USB

The unit supports hot-swap operation and S.M.A.R.T. and TRIM pass-through, making it practical for technicians who rotate backup drives or need quick access to bare 3.5in SATA media. Builders who require support for 2.5in drives without an adapter, more than one bay, or a USB-C connection will not find those features here.

Maximum tested capacity is 10TB at 7200 RPM

StarTech has validated the enclosure with drives up to 10TB running at 7200 RPM, so buyers planning larger or faster mechanisms should verify compatibility before purchase.

How it compares

Measured against everything we stock in External Drive Enclosures, at today’s prices. Recalculated every night.

Price $61.99
Pricier than about 68% of the 821 comparable items (median $30.99).

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Specifications

Product
Brand nameStarTech.com
Model nameS351BMU33ET
Product colorBlack
Product typeEnclosure
Storage
Drive interface1 x SATA Data & Power Combo (7+15 pin)
Bay count1
Ports & slots
External connection1 x eSATA (7 pin, Data) Female
1 x USB Type-B (9 pin) USB 3.0
Power
Power adapterYes
Power detailsInput Current : 0.8A
Input Voltage : 100 to 240 AC
Output Current: 2000 mA
Output Voltage: 12 DC
Size & build
Size3.5 in (8.89 cm)
Main materialSteel, Aluminum and Plastic
Product dimensions8.3 in × 5.3 in × 1.5 in
Product weight1.12 lb (0.51 kg)
Shipping weight1.04 kg
Package size241 × 159 × 102 mm
Compatibility
Supported operating systemsNo software or drivers required

Questions about this item

Does the enclosure include its own power supply or do I need to provide one?

The unit ships with an AC adapter that accepts 100 to 240 AC input and delivers 12 DC at 2000mA, so no separate supply is required.

Will the USB 3.0 port fall back to USB 2.0 speeds if I plug it into an older port?

Yes, the USB 3.0 interface is backward compatible and will operate at USB 2.0 speeds when connected to a legacy port, while eSATA remains unchanged.

How can I confirm the drive is communicating at the full 6 Gbps SATA III rate after setup?

Check the operating system device properties or a SMART utility; they will report a 6 Gbps link speed when the drive and enclosure are negotiating SATA III.

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