1U ±48V DC Industrial PC ATX Power Supply (147mm width)


1U ±48V DC Industrial PC ATX Power Supply (147mm width)

Series Model No. Output Watts Input Voltage Input Voltage range Polarity reverse protection
48 STC-48920IW 800W + 120W continuous ±48V DC ±37V ~ ±71V DC Fuse protected
   
ENVIRONMENTAL CONDITIONS:   
● Cooling:Forced Air Cooling 40x40x28 mm Fan x 2 (with 2 x Ball Bearing)
● Fan Noise level: Load 50% 65dBA, Load 70% 69dBA, Load 100% 73.5dBA @ Tested distance 1 meter
● Fan brand: DELTA, NMB, SUNON. Specifications are equivalent
● Operating Temperature: 5°C ~ +45°C Full Load (-20°C ~ +60°C Full Load Optional H version)
● Output Power:  100% @ 50°C, 70% @ 60°C 
● Operating Humidity: 5% ~ 80% RH. (Non condensing) (95% Optional H version) 
● Storage Temperature -25°C ~ +60°C  
● Storage Humidity:  5% ~ 80% RH. (Non condensing)
● Operating Altitude 10M Below Sea level and 3000M Above Sea level
   
DC INPUT CHARACTERISTICS:  
● Input connector type 40A/300V Table type single Terminal x 2
● Input Current   16A/31A(920W) @ Full Load High Line & Low Line
● Inrush Current Less than 45A Cold start @25°C ambient 
   
   
DC OUTPUT CHARACTERISTICS:   
Output Voltage Regulation Output Current Ripple & Noise
Load Line Cross 800W 120W
Min Max Min Max
+5V ±5% ±1% ±5% 0.5A 25A

50mV
+12V 1A 58.5A

120mV
+3.3V 0.5A 22A

50mV
-12V ±8% 0A 0.3A

120mV
+5VSB ±5% 0.1A 5A

50mV
+24V ±5%

0.5A 5A 240mV
Maximum continuous combined load on +3.3 V & +5V DC output shall not exceed 200
Wattage
Maximum continuous combined load on +3.3 V & +5V & 12V DC output shall not exceed 771.5
Maximum continuous total DC output power shall not exceed 800 120
   
   
OVERALL PERFORMANCE:   
● Efficiency 75% typical @48V DC Full Load @45°C
● Hold up time  The output voltage stays regulated for at least 16ms with 100% load after loss of DC input 
● Rise time  The output voltage rise from 10% to 90% with full load shall be in 20ms maximum 
   
DYNAMIC LOAD:   
● The output voltage shall remain in regulation for the step loading, and the limits for the capacitive loading are specified below: 
Output Load Step Slew Rate Load Slew Rate Capacitive
+3.3V 30% of max load 0.5A / µsec 1000µF
+5V 30% of max load 0.5A / µsec 1000µF
+12V 65% of max load 0.5A / µsec 1000µF
+5VSB 25% of max load 0.5A / µsec 1000µF
   
OVERSHOOT:   
Output Min. Nom. Max. Unit
+3.3V 3.76 4.2 4.3 Volts
+5V 5.74 6.3 7.0 Volts
+12V 13.4 15.0 15.6 Volts
+5VSB 5.74 6.3 7.0 Volts
   
OVERCURRENT PROTECTION:   
Output Short-circuit Protection
+3.3V Shut down
+5V Shut down
+12V Shut down
+5VSB Shut down
 
RELIABILITY:  
● MTBF (Mean Time Between Failure): 100 000 hours @max. Load, 48V DC & 25°C ambient 
● Safety Standards Meet EN 62368-1
● Safety Approved  
● EMI Compatibility (EMC) Standard EN 55032:2015/AC:2016, CISPR 32:2015, EN 6100-3-2:2014,
  EN 6100-3-3:2013, EN 55024:2010 +A1:2015, IEC 60601-1-2
● Electrostatic Discharge per IEC 61000-4-2: 2025: Whole System - AIR: Level 4 The Computer
  Whole System - Contact: Level 4
● Radiated Electromagnetic Field per IEC 61000-4-3: 2020: Level 2
● Electrical Fast Transient/Burst per IEC 61000-4-4: 2012: Power: Level 3
  Signal: Level 3
● Conducted RF Immunity per IEC 61000-4-6: 2023 + COR1: 2015: Power: Level 2

 

 
ISOLATION: 
 
● INPUT and OUTPUT are isolated by transformers and optical couplers 
● Dielectric Withstand INPUT to OUTPUT: 1500V DC for 60 seconds
● Dielectric Withstand INPUT to FRAME GROUND: 1500V DC for 60 seconds
● Leakage Current <0.005μA @ 48V DC
   
   
Output Connector specific:  
● ATX 24 Pin x 1 Molex 29-01-2240 or equivalent
● HDD, DVD 4 pin x 2 Molex 8981-04P or equivalent
● FDD 4 pin x 1 AMP 171822-4 or equivalent
● Serial ATA x 4 Molex 675820000 or equivalent
● CPU EPS 8 Pin (4+4) x 2 Molex 39-01-2080 or equivalent
● PCIe 12V (6+2) pin x 4 Molex 39-01-2040 or equivalent
● +24V(Mini DIN) 4 pin x 1
   
Standard Output Cable Length:  
● 550 mm ± 50 mm / 21.6 inches  
● Mini DIN 3000mm ± 50 mm / 118 inches  
   
PCB specific:  
● 6 layer  
● Copper 3 Oz each layer
● Thickness: 1.6 mm
● Material: FR4
● PCB material origin: Taiwan
   
Power chassis Dimension:  
● 285(L) x 147(W) x 40.5(H) mm / 12.93(L) x 5.79(W) x 1.59(H) inches
   
Screw hole:  
● Front Panel with 4 screw holes
● Rear panel bracket with 2 screw holes
   
Net Weight:  
● 3.2 kg / 7.05 lbs  
   
Gross Weight:  
● 3.5 kg / 7.714 lbs  
   

DOWNLOAD_specification_1UATX_STC-48920IW.pdf
DOWNLOAD_CHASSIS DRAWING STC-285_147_40.5mm-20250121.pdf