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12V 4.2A LED Power Supply 50W S-50W-12

    Unit Price: USD 3.2 / Piece/Pieces
    Payment Type: L/C,T/T,Money Gram,Western Union
    Incoterm: FOB,CFR,CIF,EXW
    Min. Order: 100 Piece/Pieces
    Delivery Time: 15 Days

Basic Info

Model No.: S-50W-12

Usage: Construction, Industry, Light

Output Type: Single

Driving Method: LED Regulator Voltage

Circuit Structure: Electronic Step-down Transformer

Certification: CCC, ISO9001, ROSH, CE

Power Supply Mode: Constant Voltage Source

Modulation System: PWM

In-Out: Step-down Type

Power Supply Voltage: AC85-265

Pack Sealing Size: SMD

Item Name: Led Power Supply

Efficiency: 82%

Protection: OVP OCP SCP OTP

Warranty: 1 Year

Output: 12v 4.2a

Size: 11*7.8*3.5cm

Weight: 245g

Additional Info

Packaging: 100pcs/ctn

Productivity: 20000pcs per week

Brand: OEM

Transportation: Ocean,Land,Air,Express

Place of Origin: Shenzhen

Supply Ability: 20000pcs per week

Certificate: ISO9001

HS Code: 8504401400

Port: Shenzhen,Shekou

Product Description

12V 4.2A LED Power Supply 50W S-50W-12

AC input rectifier filter circuit principle:
① lightning protection circuit: when there is lightning, resulting in high voltage through the power grid into the power, by the MOV1, MOV2, MOV3: F1, F2, F3, FDG1 circuit protection. When the voltage applied to both ends of the varistor exceeds its operating voltage, its resistance decreases, so that high-pressure energy consumption in the varistor, if the current is too large, F1, F2, F3 will burn the protection of the secondary circuit.
② input filter circuit: C1, L1, C2, C3 composed of double π-type filter network is mainly on the input power of the electromagnetic noise and clutter signal suppression to prevent interference to the power supply, but also to prevent the power itself generated high-frequency clutter Interference to the grid. When the power is turned on, to charge C5, due to instantaneous current, plus RT1 (thermistor) can effectively prevent the inrush current. Due to instantaneous energy consumption in the RT1 resistance, after a certain period of time after the temperature rise RT1 resistance decreases (RT1 is the negative temperature coefficient components), then it consumes very little energy, the post-circuit can work properly.
③ rectifier filter circuit: AC voltage by BRG1 rectifier, the C5 filter to be more pure DC voltage. If the C5 capacity becomes smaller, the output ripple will increase.

For this item, followed are the Features:

1. Universal AC input/Full range

2. Protection: Short circult/Overload/Over Voltage

3. Cooling by free air convection

4. 100% full load burn-in test with 3-5 hours

5. No load power consumption < 0.5W

6. High efficiency, long life and high reliability

7. One year warranty






DC Output Voltage




Iutput Voltage Error

± 2%

± 1%

± 1%

Rated Output Current




Output Current Range




Tripple and Noise




Iniet Stability

± 0.5%

± 0.5%

± 0.5%

Tolerance Voltage

± 1%

± 0.5%

± 0.5%

DC Output Power








Adjustable Range for DC Voltage




AC Input Voltage Range

90~132VAC/180~264VAC selected by switch 47~63Hz; 240~370VDC

Input Current

2A/115V 1.5/230V

AC Inrush Current

Cold-Start Current: 25A/115V, 50A/230V

Leakage Current


Overload Protection

105%~150% Type: Cut Output, Reset: Auto Recovery

Over Voltage Protection


High Temperature Protection


Temperature Coefficient

± 0.03% /°C (0~50°C)

Start, Rise, Hold time

200ms, 100ms, 20ms


10~500Hz, 2G 10min,/1cycle, a total of 60 minutes, Each axes

Withstand Voltage

Between Input and Output: 1.5KVAC, Input and Shell: 1.5KVAC, Output and Shell: 0.5KVAC

Isolation Resistance

Input and Output Intermal: Input and Enclosule, Output and Enclosure: 500VDC/100M Ohms

Working Temperature and Humidity

`-10°C~+60°C (Refer to Output Dreating Cutive), 20%~90%RH

Storage Temperature and Humidity

`20°C~+85°C, 10%~95%RH

Overall Dimension




EMC Standards

Meet FCC Part 15J Conduction class B

12v 4.2a power supply

waweis factory

Please Note:

1. The testing condition for the parameter above is: 230VAC input, rated load, 25°C 70%Rh, Humidity.

2. Error, include the setting error, line stability and load stability.

3. Wave test: adopting "A12" double wire for 20MHZ, and 0.1uF capacitor short-circuit for interrupting.

4. Inlet Voltage Stability test: when is over load, the lowest voltage of inter is representative to the highest voltage.

5. Load stability test: the load is from 0% to 100%, others 60%.

6. C3.4 must be knocked down.


•Office , Artwork, Display items lighting;

•Household lighting;

•Commercial lighting, such as Flood light, Down light, Flexible strip light, Wall washer, etc;

•Hotel, Restaurant lighting;

•Other public facility lighting.

Looking for ideal 12V 4.2A Power Supply Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Power Supply 50W are quality guaranteed. We are China Origin Factory of 12V 4.2A LED Power Supply. If you have any question, please feel free to contact us.

Product Categories : Switching Power Supply > 12V Power Supply

Product Images

  • 12V 4.2A LED Power Supply 50W S-50W-12
  • 12V 4.2A LED Power Supply 50W S-50W-12
  • 12V 4.2A LED Power Supply 50W S-50W-12
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