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Black 3U rackmount server chassis with blue aluminium front bezel, four 5.25-inch and two 3.5-inch external drive bays

iStarUSA Inc.

iStarUSA Inc. D-300SEA 3U server chassis

SKU CH-WTW7-JYTMH MPN D-300SEA

A 3U rackmount chassis with four 5.25" bays, two external 3.5" bays, one internal 3.5" bay and seven expansion slots

  • Form factor3U
  • Chassis styleRackmount
  • Housing materialAluminum / Steel
  • Supported motherboard sizes12 × 9.6 (ATX, microATX)
  • 5.25-inch external bays4
  • External 3.5" drive bays2

Model D-300SEA

  • 3U rackmount design fits standard 19.00" cabinets
  • 4 external 5.25" bays plus 2 external and 1 internal 3.5" bays
  • 7 expansion slots support full-length add-on cards
  • 2 front USB 2.0 ports with power, reset, and lockable bezel
  • 60mm fan included; optional sensor board adds temperature and fan monitoring

3U Rackmount Chassis with Four 5.25" Bays

The iStarUSA D-300SEA is a 3U rackmount server chassis designed for compact deployments that still require multiple front-accessible drives. It accepts ATX and microATX motherboards up to 12 x 9.6 inches, making it suitable for general-purpose server builds and industrial applications where space is limited.

Single 60mm Fan with Sensor Indicators

Cooling is handled by one 60mm fan, while front-panel LEDs show power, drive activity, temperature and fan status when the optional TC-ISF08 sensor board is installed. The chassis supports 1U or 2U power supplies, allowing builders to match power capacity to their specific component load without prescribing a fixed wattage.

Aluminium and Steel Build with Lockable Bezel

The body combines aluminium and steel, and the front bezel features a key lock to restrict physical access to the drive bays and controls. Seven expansion slots accommodate full-length add-in cards, while two USB 2.0 ports on the front provide convenient peripheral connectivity for maintenance or temporary devices.

How it compares

Measured against everything we stock in Rackmount Server Cases, at today’s prices. Recalculated every night.

Price $146.99
Cheaper than about 78% of the 1,006 comparable items (median $222.49).

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Specifications

Product
Brand nameiStarUSA
Product lineD Storm
Model nameD-300SEA
Product colorBlack
Storage
5.25-inch external bays4
External 3.5" drive bays2
3.5-inch internal bays1
Ports & slots
Expansion card slots7
Front panel ports2 x USB 2.0
Size & build
Form factor3U
Chassis styleRackmount
Housing materialAluminum / Steel
Product dimensions19 in × 5.25 in × 20.8 in
Shipping weight12.50 kg
Package size679 × 565 × 260 mm
Compatibility
Supported motherboard sizes12 × 9.6 (ATX, microATX)
More details
60mm fans1

Other versions of this model

3 more in the same range

Questions about this item

How do I mount the D-300SEA in a 19-inch rack, and which step is often missed?

The chassis is 19.00 inches wide and 3U high; the step often missed is installing the optional sensor board TC-ISF08 so the front temperature and fan indicators actually work.

What will need replacement first on the D-300SEA?

The single 60mm fan is the only moving part; it should be checked regularly and swapped when airflow drops or noise rises.

What thermal limit appears first under sustained load in the D-300SEA?

With only one 60mm fan, the internal air temperature hits its ceiling before the seven expansion slots or four 5.25-inch bays fill up.

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