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X310 is a small size, fanless, high power DC-DC ATX PC power supply unit (PSU) designed for use with mini-ITX PC.  X310 accepts 16-28V wide-range DC input and provides a cool, silent 300 Watts of power for small size PC designs. With the two current mode synchronous step-down controllers operating in 180° out of phase, X310 provides as much as 20 Amp current on the 12V output rail, facilitating using the high performance graphic card. The PSU is compatible with an entire range of mini-ITX motherboards as well as regular motherboards.

Compared with X300 DC-ATX PSU, X310 enlarges the input voltage to 28V and has different output connector layout. Both X300 and X310 have the same functions.

Block Diagram

I/O Diagram

Mounting Hole

Input Characteristics

Minimum Input Voltage +16.00V
Maximum Input Voltage +28.00V (over-voltage protecting occurs at +28.00V)
Input Current Limit No
Reverse Input Protection No
The recommended input voltages are 19V, 19.5V, 20V or 24V.

Maximum Power Characteristics

Output Rail +3.3V +5V +12V1 +12V2 +5Vsb -12V
Current Max 12A 12A 16A 2A 0.05A
Regulation 1.50% 1.50% 4.00% 1.50% 5.00%
Power 99W 192W 10W 0W
Total Power 300W @+25°C
Forced air ventilation is required for load larger than 180 Watts. For fanless or improper ventilation operation, de-rate the output current of each rails by at least 30%.

Cable Length

ATX Cable 1 x 350mm
EPS Cable 1 x 400mm
PCIE Cable 1 x 400mm (EPS), 450mm (PCIE)
SATA Cable 1 x 250mm, 300mm, 350mm, 400mm (Molex)
DC Power Input 1 x 380mm

Connector Quantity

ATX 1 x 24Pin (20+4)
EPS (CPU) 1 x 8Pin (4+4)
PCIE 1 x 8Pin, 1 x 8Pin (6+2)
SATA 3 x SATA, 1 x Molex
DC Power 1 x DC IN (5.5x2.5), 1 x Molex Output (2x2)

Additional Characteristics

Model PWR-D24V300Fx
Switching Efficiency (VIN=19V) >94%, all rails combined, 50% load
Operating Temperature 0°C to +65°C
MTBF 200000 Hours
Net Weight (PSU + Cables) 370 grams
PSU Dimension 150mm (L) x 53mm (W) x 15mm(H)
Mounting Hole Spacing
Approvals No
See the mounting hole diagram for detailed mounting hole positions.

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