+86 18824706559

New Products

DC29V 120W open frame switching power supply

The single output 29V 120W switching power supply can meet the CE ETL FCC standards,it is the small size and with PFC function.

  • Brand:

  • Item NO.:

  • Product Origin:

  • Shipping Port:

    Guangzhou port
  • Lead Time:

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

DC29V 120W Switching Power Supply


Compact size power supply 120W,it is the open frame type,and it is with the active PFC,now it is widely used to the charger,medical machine and other industrial equipments.


1, 120W Switching power supply with High efficiency, low temperature rise;
2, 29V power supply with Built-in filters, low output noise;
3, 29V PSU 120W with Wide range of AC input voltage;
4, 120W open frame PSU with Short circuit, overload, over-temp. protection;

5, 120W Switching powers Used in LED light,CCTV camera etc.

            Item No K31A-UP120S12 K31A-UP120S24 K31A-UP120S29 K31A-UP120S36

Output Voltage

+12V +24V +29V +36V

Rated Current

9.6A 4.8A 4.2A 3.3A

Current Range

0-9.6A 0-4.8A 0-4.2A 0-3.3A

Rated Power(with cooling fan)

115.2W 115.2W 121.8W 118.8W
Rated power(without cooling fan) 79.2W 79.2W 79.2W 79.2W


150mVp-p 240mVp-p
280mVp-p 360mVp-p

Adjustable Output Range


25.2-30.8V 26.1-37.31.9V 32.4-39.6V

Output Accuracy


Line Regulation


Load Regulation


Set up,Rise,Keep up time

600ms, 50ms, 20ms/230VAC


Input Voltage Range

88~264V AC,100~370VDC

Input Current


Input Frequency



83% 85% 88% 88%

Inrush Current


Leakage Current



Over Load Protection

105~180%,Hiccup,automatic recovery

Over temp. Protection

when TS1 position>105 degree,it will be protected,then automatic recovery.


Working Temp.,Humidity

-20~60℃,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:3kv,I/P-FG:1.8KV,O/P-FG:0.6KV DC 1min

Insulation Resistance

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

EMC Standards

GB9254,EN55022 CLASS B

Others Dimension


Weight 0.3kg

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:

DC29V 120W open frame 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) 
Send a message

If you have any questions,please contact us,we will reply you as soon as possible.Looking froward to our kind cooperation in the near future! Thanks!

If you have questions or suggestions,please leave us a message,we will reply you as soon as we can!

Contact Us
Address:2F BLDG8,Standard Ind.Park,Dongchong Town,Nansha District 511453 Guangzhou Guangdong China Tel:+86 020 39934402    Fax:+86 020 39934452 Cell Phone:+86 18824706559 E-mail:amy@gzkaihui.com

Copyright © Guangzhou Kaihui Electronics Co.,Ltd All Rights Reserved

Chat now

Live Chat

If you have questions or suggestions,please leave us a message,we will reply you as soon as we can!