After successfully introducing and implementing many enthusiasts features such as fully modular cables and 80 PLUS certifications into the versatile Strider series that encompasses models rating from 350W to 1500W, SilverStone has decided to take its power supply expertise into the masses by releasing the Strider Essential series, a line of power supplies designed with high affordability and great performance. The Strider Essential series models, ST40F-ES and ST50F-ES are power supplies with 80 PLUS certification level efficiency and single +12V rail design. Its quiet running fan ensures stable performance with minimum noise while its solid design and components support up to 40 degrees for 24/7 operation. The ST40F-ES and ST50F-ES can also fully support multi-GPU systems with 8pin/6pin PCI-E connectors. From a value and performance standpoint, the Strider Essential series is an outstanding choice.

• High efficiency with 80 PLUS certification
• 400W 24hour continuous power output with 40°C operating temperature
• Class-leading single +12V rail with 25A
• Multiple protection circuitry
• Silent running 120mm fan with 18dBA minimum
• Support ATX 12V 2.3
  
• Active PFC

Model	SST-ST40F-ES
Max. DC Output	400W
+3.3V +5V +12V1 +5VSB -12V Max Amps 24A 20A 25A 2.5A 0.3A Min Amps 0.1A 0.2A 0.6A 0A 0A Range % ±5%  ±5% ±5% ±5% ±10% Line Reg. % ±1% ±1% ±1% ±1% ±1% Ripple mVp-p 100mV 100mV 150mV 100mV 150mV
combined +3.3, +5V	120W
combined +12V	300W / 25A
Input Voltage	103.5V~253V
Input Frequency Range	47Hz ~ 63Hz
PFC	Active PFC（PF>0.95 at Full Load）
Efficiency	>80% at 20%~100% loading
MTBF	100,000 hours at 25℃（at Full Load）
Operating temperature	0°C ~ 40°C
Protection	Over Current Protection Over Power Protection Over Voltage Protection Under voltage protection Short Circuit Protection
Connectors	1 x 24 / 20-Pin Motherboard connector （500mm） 1 x 8 / 4-Pin EPS / ATX 12V connector （550mm） 2 x 6-Pin PCIE connector （500mm / 150mm） 4 x SATA connector （400mm / 150mm / 150mm / 150mm） 3 x 4-Pin Peripheral connector （400mm / 150mm / 150mm） 1 x 4-Pin Floppy connector （400mm / 150mm / 150mm / 150mm）
Cooling System	Silent 120mm fan
Noise Level	18dBA-34dBA
Certification	80 PLUS
Dimensions	150 x 86 x 140 mm
Weight	1.4 kg