SilverStone SFX Series 300W ST30SF 300W

SKU: ST30SF Category:

SFX Series

  • Intelligent semi-fanless operation (V1.0 only)
  • Supports standard SFX form factor and ATX via included bracket
  • 300W continuous power output at 50℃ temperature rated for 24/7 operation (V1.0)
  • 300W continuous power output at 40℃ temperature rated for 24/7 operation (V2.0)
  • 80 PLUS Bronze level efficiency (82% ~ 85% efficiency at 20% ~ 100% loading)
  • Class-leading single +12V rail
  • Silent running 80mm fan (V1.0)
  • Silent running 92mm fan (V2.0)
  • Single PCI-E 6pin connectors support
  • Active PFC

As the standards bearer of SFF (small form factor) cases and SFX PSUs, SilverStone has released a reference power supply design for the masses in the ST30SF, a 300W SFX unit designed with high affordability and great performance. It has 80 PLUS Bronze efficiency and a silent running fan for class leading efficiency and low noise.

To enable users to easily take advantage of this excellent SFX power supply, an adapter is included to convert ST30SF to mount in any ATX case in addition to ones that fit only SFX. For SFF users, the ST30SF is an excellent, well-rounded power supply for any DIY desktop computer.

V1.0 has greater +3.3V and +5V output and higher temperature rating of 10℃ ~ 50℃ for NAS/storage focused systems or industrial PCs (IPC).

V2.0 has greater +12V output and lower noise for home desktops or gaming PCs.


Model No. SST-ST30SF
Max. DC Output 300W
Power density 378W per liter
Load Range (V2.0)
+3.3V +5V +12V1 +5VSB -12V
Max.(Amps) 16A 16A 25A 3A 0.3A
Min.(Amps) 0A 0A 0.3A 0A 0A
Range (%) ±5% ±5% ±5% ±5% ±10%
Line Reg.(%) ±1% ±1% ±1% ±1% ±1%
Ripple(mVp-p) 50mV 50mV 120mV 50mV 120mV
Load Range (V1.0)
 +3.3V  +5V  +12V  +5VSB  -12V
Max.(Amps)  21A  20A  22A  2.5A  0.5A
Peak (Amps)  /  /  /  /  /
Min.(Amps)  0.1A  0.2A  0.5A  0A  0A
Range (%)  ±5%  ±5%  ±5%  ±5%  ±10%
Line Reg.(%)  ±1%  ±1%  ±1%  ±1%  ±1%
Ripple(mVp-p)  50mV  50mV  120mV  50mV  120mV
Color Black(Lead-Free Paint)
combined +3.3, +5V 90W (V2.0)
103W (V1.0)
combined +12V 300W / 25A (V2.0)
264W / 22A (V1.0)
Input Voltage 90 – 264 Vrms
Input Frequency Range 47Hz ~ 63Hz
PFC Active PFC(PF>0.9 at Full Load)
Efficiency 82%~85%(20% to 100% loading)
MTBF 100,000 hours
Operating temperature 0 ~ 40℃(V2.0)
10°C ~ 50°C (V1.0)
Protection Over Current Protection
Over Voltage Protection
Short Circuit Protection
Over Power Protection (V2.0 only)
Under Voltage Protection (V2.0 only)
Connectors 1 x 24 / 20-Pin motherboard connector(300mm)
1 x 8 / 4-Pin EPS / ATX 12V connector(400mm)
1 x 6-Pin PCIE connector(400mm)
3 x SATA connector (300mm / 200mm / 100mm)
2 x 4-Pin Peripheral connector (300mm / 200mm)
1 x 4-Pin Floppy connector(300mm / 200mm / 200mm)
Cooling System Single 92mm silent fan (V2.0)
Single 80mm silent fan (V1.0)
Noise Level 18dBA minimum (V2.0)
0 ~ 38 dBA (V1.0)
Dimension 125 mm (W) x 63.5 mm (H) x 100 mm (D)
4.92″ (W) x 2.5″ (H) x 3.94″ (D)
Weight 1.0 kg (V2.0)
0.8 kg (V1.0)
Form factor SFX
Certification 80 PLUS Bronz
Other Includes SFX to ATX bracket for use in ATX case
GPU Support list
Compatible with ATX12V v2.4