MEAN WELL LRS-350-4.2 Switching Power Supply Output 4.2Volts, 60Amps

Sale price$48.36 USD



-AC Input range selectable by switch 

-Withstand 100 VAC surge input for 5 second 

-Protections: Short circuit/overload/over voltage /over temperature

-Forced air Cooling by built-in DC FAN

-Built-in cooling FAN ON-OFF control

-1U low profile 

-Withstand 5G vibration test

-LED indicator for power on

-No load power consumption <0.75 W

-100% full load burn in-test 

-High operating temperature up to 70 °C

-Operating altitude up to 5000 meters (Note.8)

-High efficiency , long life and high reliability 

-3 years warranty 


LRS- 350 series is a 350 W single-output enclosed type power supply with 30 mm of low profile design . Adopting  the input of 115 VAC or 230VAC (selected by switch), the entire series provides an output voltage line of 3.3V, 4.2V, 5V, 12V, 15V, 24V, 36V and 48V. 

In addition to the high efficiency up to 89%, with the built-in long life FAN LRS-350 can work under -25 ~ +70 ℃ with full load. Delivering an extremely low no load power consumption(less than 0.75W), it allows the end system to easily meet the worldwide energy requirements .LRS-350 has the complete protection functions and 5G anti vibration capability ; it is complied with the international safety regulations such as UL60950-1. LRS-350 series serves as a high-price to performance power supply solution for various industrial applications. 



-DC voltage :  4.2 V

-Rated current : 60V

-Current range:  0 ~ 60A

-Rated power : 252W

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

-Voltage Adj. Range : 3.6 ~ 4.4V

-Voltage Tolerance Note.3:  ± 4.0%

-Line regulation : ±0.5%

-Load regulation:  ±2.5%

-Setup, Rise Time : 1300ms, 50ms/230VAC 1300ms,50ms/115VAC at full load

-Hold up Time (Typ.) : 16ms/230VAC 12ms/115VAC at full load


-Voltage range (Note 5.) : 90~ 132VAC / 180 ~ 264VAC by switch 240 ~ 370VDC (switch on 230VAC)

-Frequency range : 47 ~ 63Hz

-Efficiency(Typ.) : 81.5%

-Ac current (Typ.) : 6.8A/115VAC 3.4A/230VAC

- Inrush Current (Typ.): 60A/115VAC 60A/230VAC

-Leakage Current : <2mA / 240VAC


Overload: 110 ~ 140% rated output power

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

Over voltage : 4.6 ~ 5.4V

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


FAN ON/OFF Control (Typ.)      RTH3 ≥50°C FAN ON, ≤ 40°C FAN OFF 


Working Temp. : -25 ~ +70°C ( Refer to ''Derating Curve'' )

working humidity:  20 ~ 90% RH non-condensing

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

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

Vibration :  10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes


Safety Standards :  UL60950-1 approved

Withstand voltage :  I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC

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



MTBF : 327.9K hrs min. MIL-HDBK-217F (25 ) ℃

Dimension : 215*115*30 mm (L*W*H)

Packing : 0.76Kg; 15pcs/12.4Kg/0.78CUFT


1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25 ℃ 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. Line regulation is measured from low line to high line at rated line.

5.Load regulation is measure from 0% to 100% rated load.

6. Length of se up time is measured at cold first start .Turning ON/OFF the power supply very quickly may lead to increase of the set up time .

7.The 150% peak load capability is built in for up to 1 second for 12~48V. LRS-350 will enter hiccup mode if the peak load is delivered for over 1 second and will recover once it resumes to the rated current level(115VAC/230VAC).

8.The ambient temperature derating of 5 ℃ /100m is needed for operating altitude greater than 200m(6500 ft).


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