iStarUSA Inc.
iStarUSA Inc. D-300SEA-BL-RAIL24 3U server rack with 20" rails
3U rackmount chassis holds two 3.5″ drives, one internal 3.5″ bay, four 5.25″ bays and supports ATX or microATX boards with a 20″ sliding rail kit included
- TypeRack Mount Cabinet
- Rack Units3U
- ColorColor of Front Bezel: Blue Color of Main Chassis: Black
- MaterialMaterial of Front Bezel: Aluminum alloy Material of Handle:
- Cooling (Optional)1 x 60mm, 3 x 80mm (bracket DD-FANGUARD-8 required)
- Cooling (Standard)1 x 60mm
- 3U compact rackmount fits tight spaces with 19.00" width and 20.80" depth
- Patented aluminum front bezel with key lock secures hardware in blue finish
- Front-access dual USB 2.0 ports simplify peripheral connections
- Standard 60 mm fan plus optional 80 mm brackets expand cooling capacity
- Seven expansion slots support ATX and microATX boards up to 12" x 9.6
Compact 3U rackmount chassis for ATX builds
The iStarUSA D-300SEA-BL-RAIL24 is a 3U rackmount cabinet that fits standard 19-inch racks and accepts ATX or microATX motherboards up to 12 by 9.6 inches. It ships with a blue aluminium front bezel, a 1.2mm SECC steel chassis and a 20-inch sliding rail kit for quick installation. Two front USB 2.0 ports, power and reset switches, and status LEDs for power, drive activity, temperature and fan health are built in. A single 60mm fan provides baseline airflow.
Upgrade from tower cases or smaller 1U units
Moving from a desktop tower to this 3U rackmount adds density and front-access drive bays without sacrificing full-size motherboard support. The jump is worth it when you need four 5.25-inch external bays, two 3.5-inch external bays and one internal 3.5-inch bay in a single rack unit that also accommodates 1U or 2U power supplies. Seven expansion slots handle full-length add-in cards for storage controllers or networking.
Limited by 60mm standard cooling
The chassis includes only one 60mm fan as standard; adding up to three 80mm fans requires the separate DD-FANGUARD-8 bracket. Temperature and fan monitoring LEDs depend on the optional TC-ISF08 sensor board. Builders who need redundant cooling, hot-swap drive trays or deeper chassis clearance for long GPUs will find those features absent. The 20-inch rail depth also restricts use in shallower cabinets.
Highlights
- 3U compact rackmount fits tight spaces with 19.00" width and 20.80" depth
- Patented aluminum front bezel with key lock secures hardware in blue finish
- Front-access dual USB 2.0 ports simplify peripheral connections
- Standard 60 mm fan plus optional 80 mm brackets expand cooling capacity
- Seven expansion slots support ATX and microATX boards up to 12" x 9.6
Specifications
| Brand | iStarUSA |
|---|---|
| Model | D-300SEA-BL-RAIL24 |
| Type | Rack Mount Cabinet |
| Rack Units | 3U |
| Color | Color of Front Bezel: Blue Color of Main Chassis: Black |
| Material | Material of Front Bezel: Aluminum alloy Material of Handle: SECC Zinc-Coated Steel Material of Main Chassis: 1.2mm SECC Zinc-Coated Steel (Japan Made) |
| Cooling (Optional) | 1 x 60mm, 3 x 80mm (bracket DD-FANGUARD-8 required) |
| Cooling (Standard) | 1 x 60mm |
| Specification | Standard Drive Bays: - 3.5" Drives: 2 - 3.5" Drive (internal): 1 - 5.25" Drives: 4 Indicators: Power, HDD, Temperature, Fan (Fan/Temp require sensor board TC-ISF08 ) Switches: Power, Reset Supported PSU Type: 1U, 2U Expansion Slots: 7 Security: Front Bezel Key Lock Front Connector: 2 x USB 2.0 Motherboard Size: 12" x 9.6" (ATX, microATX) |
| Features | Patented Aluminum Front Panel with Locks,Taiwan: 200281 / 190240 , China: 2L01259648.5 Front Access USB2.0 x2 60mm x1 Cooling Fan Power and HDD LED Power and Alarm Reset Switch Optional Aluminum Chassis with 20" Sliding Rail Kit |
| Unit Dimension | 19.00" x 5.25" x 20.80" |
| Shipping weight | 15.88 kg |
| Package size | 686 × 559 × 254 mm |
Questions about this item
Will the 19.00" wide chassis fit my standard 19-inch rack posts?
The unit dimension is 19.00" wide, matching standard 19-inch EIA rack spacing for direct mounting.
How do I attach the included 20" sliding rails to the cabinet?
Mount the inner rail sections to the chassis sides with supplied screws, then bolt the outer sections to the rack posts; extend rails until they lock before sliding the chassis in.
Which fan bracket is required if I add three 80mm fans later?
The optional 3 x 80mm cooling configuration requires the DD-FANGUARD-8 bracket, which is not included with the standard 1 x 60mm fan.
New to this? Buying server hardware with crypto — what to check, what it costs to pay, and what is never asked for.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.



