MEAN WELL SP-320-3.3 Switching Power Supply Output 3.3Volts ,55Amps

Sale price$185.93 USD



-Universal AC input/ Full range

-Built-in active  PFC function, PF>0.95

-Protections: Short circuit/Overload/Over voltage/over temperature.

-Forced air cooling by built-in DC fan 

-Built-in FAN speed control 

-Fixed switching frequency at  100 KHz

-3years warranty



-DC voltage :  3.3 V

-Rated current : 55 A

-Current range: 0 ~ 60A

-Rated power : 181.5W

-Ripple and noise (max.) Note.2 :  150mVp-p

-Voltage Adj. Range : 3.14 ~ 3.63V

-Voltage Tolerance Note.3:  ±1.0%

-Line regulation : ± 0.5%

-Load regulation: ±1.5%

-Setup, Rise Time : 800ms, 50ms/230VAC 2500ms, 50ms/115VAC at full load

-Hold up Time (Typ.) : 16ms/230VAC 16ms/115VAC at full load


-Voltage range : 88 ~ 264VAC / 124~370VDC 

-Frequency range : 47 ~ 63Hz

-POWER FACTOR (Typ.) : PF>0.95/230VAC PF>0.98/115VAC at full load

-Efficiency(Typ.) : 74%

-Ac current (Typ.) 

15VAC: 2.5A

230VAC: 1.5A

- Inrush Current (Typ.): 20A/115VAC 40A/230VAC

-Leakage Current : <1mA / 240VAC


Overload: 105 ~ 135% rated output power

Protection type : Hiccup mode, recovers automatically after fault condition is removed

Over voltage : 3.8 ~ 4.5V

Protection type : Shut down o/p voltage, re-power on to recover 

Over temperature : Shut down o/p voltage, recovers automatically after temperature goes down

Working Temp. : -20 ~ +65 °C (refer to "Derating Curve )

working humidity:  20 ~ 90% RH non-condensing

Storage Temp., Humidity:  -40 ~ +85 °C , 10 ~ 95% RH

Working humidity : 20 ~ 90% RH non-condensing

Storage Temp., humidity : -40 ~ +85℃, 10 ~ 95% RH 

Temp. Coefficient  : ±0.03%/°C (0~50 °C )

vibration : 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

Safety and EMC (note4)

Safety Standards :  UL60950-1, TUV EN60950-1 approved

Withstand voltage :  I/P-O/P: 3KVAC I/P-FG: 2KVAC O/P-FG: 5KVAC

Isolation resistance : I/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC / 25℃/ 70% RH

EMC emission : Compliance to EN55032 (CISPR32) Class B, EN61000-3-2,-3

EMC immunity : Compliance to EN61000-4-2,3,4,5,6,8,11, EN55024, light industry level, criteria A


MTBF : 207K hrs min. MIL-HDBK-217F (25°C )

Dimension :  215*115*50mm (L*W*H)

Packing : 1.1Kg; 12pcs/14Kg/0.92CUFT


1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25°C  of ambient temperature.

2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.

3. Tolerance : includes set up tolerance, line regulation and load regulation.

4.the power supply is considered a component which will be installed into a final equipment .All the EMC tests are been executed by mounting the unit on a 360 mm*360 mm metal plate with 1 mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives . For guidance on how to perform these EMC tests, please refer to ''EMI testing of component power supplies''

5. Derating maybe needed under low input voltages .Please check the derating curve for more details .

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