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230V ac to dc 12V 20A power supply CCTV camera switching power supply 240W

The switching power supply 240W with the single output 12V 24V 36V 48V,the input voltage is 200-240VAC,220V 230V also available,the dimension is 199*99*50mm,it is no PFC,but the efficiency is more than 87%,and it has the competitive price.

  • Brand:

  • Item NO.:

  • Product Origin:

  • Shipping Port:

    Guangzhou port
  • Lead Time:

    2 days for stocks; 7-10 days for samples
Product Details

12V 20A switching power supply


12V 20A switching power supply is the 230V ac to dc 12V 20A switching power supply,now it is widely used to the cctv camera,it is no PFC,but its efficiency is more than 87%,now it is vey popuar among the market,because it has the competitive price.


1, high efficiency DC12V 20A power supply;
2, 230V ac to DC12V power supply;
3, Over load, short circuit protection,over-temperature protection;

4, 240W switching power supply with high efficiency.

            Item No. K21-H240S12 K21-H240S24 K21-H240S36 K21-H240S48

Output Voltage

+12V +24V +36V +48V

Rated Current

20A 10A 6.7A 5A

Current Range

0-20A 0-10A 0-6.7A 0-5A

Rated Power

240W 240W 240W 240W

Ripple & Noise

240mVp-p 500mVp-p
720mVp-p 960mVp-p

Adjustable Output Range


Output Accuracy


Line Regulation


Load Regulation


Set up,Rise,Keep up time

200ms, 200ms, 200ms


Input Voltage Range

200-240V AC

Input Current


Input Frequency


Power Factor >0.5

Efficiency @230Vac

>87% >89% >90% >91%

Inrush Current

Cold start 20A@230V

Leakage Current



Over Load Protection

105~180% Hiccup automatic protection

Short Circuit Protection


Over Temp., protection >120 degree,receovers automatically after the temp. goes down.


Working Temp.,Humidity

-20~40℃,10~90% RH,No condensation

Storage Temp.,Humidity

-20~85℃,10~95% RH




10~500Hz, 2G 10min /1cycle, PERIOD FOR 60min EACH AXES

Safety&EMC Standards

Safety Standards


Withstand Voltage

I/P-O/P:1.8KV; I/P-FG:1.8KV;O/P-FG:0.5KV DC 1min

Insulation Resistance

I/P-O/P, I/P-FG, O/P-FG:500VDC / 100M Ohms

EMC Standards


Others Dimension


Weight 0.5kg

1.All parameters 230VAC input, rated load, ambient temperature 25 ℃, measured under conditions of 70% humidity;

2. Accuracy: includes set up tolerance, line regulation, load regulation and so on;

3. Ripple Test: 30cm long strands connect the power supply and the load on the load side and 0.1u and 47u capacitor to 20MHz oscilloscope measured at the load end;

4. Line regulation: at rated load conditions, the input voltage changes from low to high measured;

5. Load regulation: the measured output load from 0 to 100% load change measured.

Product picture:

12V 20A switching power supply


Q1. Can I have a sample order for power supply?
A1: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.


Q2: Do you accept OEM/ODM for the switching power supply  ?

A2: Yes. we do.


Q3:How about the quality?

A3:We have the better professional and experienced engineers team and strict QA and QC system.Repair rate under 0.1%~0.2%


Q4:What is PFC?
A4:PFC stands for Power Factor Correction. The purpose of PFC is to improve the ratio of apparent power and real power. The power factor is only 0.5~0.7 in non-PFC models. In PFC models, the power factor can reach above 0.9. The calculation formulas are as below: 
Apparent Power=Input Voltage x Input Current (VA) 

Real Power= Input Voltage x Input Current x Power Factor (W) 

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