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Quick Details

  • Place of Origin: China (Mainland)
  • Brand Name: Hengfu
  • Model Number: HF20W-SB
  • Output Power: 1 - 50W
  • Output Type: Single
  • Input Voltage: 85 - 264VAC
  • Output Voltage: 12V, 24V
  • Output Current: 1.5A, 0.7A
  • Dimensions: 111 x 78 x 36mm

Packaging & Delivery

Packaging Details: 0.28kgs/pcs, 64pcs/18.7kgs/0.045CBM per carton for 20W Dual Output 13.8V Battery Charger Power Supply
Delivery Detail: 2-3 weeks for 20W Dual Output 13.8V Battery Charger Power Supply


Charge lead acid battery, UPS function
AC input failure signal
Battery low signal
CE,ROHS,ISO9001 approved
Factory 20 years

20W Dual Output 13.8V Battery Charger Power Supply

Product features:
1) Universal AC input / full range
2) To charge lead acid battery by floating charge

3) Auto switch when power off (UPS function)

4) AC mains failure signal

5) Battery low signal

6) Approvals: CE

7) Battery +/- pole reverse connection protection

8) Protection: overload/ over voltage/ short circuit
9) 100% full load burn-in test

10) Built in EMI filter
11) 5 years limited warranty

12) Dimensions: 111 x 78 x 36mm


AC input voltage range

85~264VAC (120~370VDC)

Input current0.8A
Input frequency47~63Hz
Inrush currentcold start, 15A/115V, 30A/230V
Input leakage current< 1mA/230VAC
Line regulation (full load)± 0.5%
Output voltage adjust rangeV1: ± 5%, V2: not adjustable
Output overload protectionbuilt-in IC protectin, hiccup mode, auto recovery
Output over voltage protection115~150%, hiccup mode, auto recovery
Withstand voltage

I/P-O/P: 3KVAC/1min, I/P-F/G: 1.5KVAC/1min, O/P-F/G: 0.5KVAC/1min

Rise time50ms@full load (typical)
Hold up time20ms@full load (typical)
Operating temperature-10°C ~+50°C
Storage temperature-20°C ~+85°C
MTBF> 100,000 hours
Safety standardsGB4943, UL60950, EN60950
EMC standardsGB9254, EN55022 class B, EN55024, EN61000-3-2,3, EN61000-4-2,3,4,5,6,8,11
Vibration10~150Hz, 2G 10min/1cycle, 30min each along X, Y, Z axes
Cooling methodconvection


Model No.DC Output

Voltage adjust range

Voltage tolerance

Battery low voltage protection

HF20W-SB-1212V 1.5A± 5% ± 1%9.6V ± 0.5V120mV 71%
13.8V 0.5A (charger)not adjustable± 3%
HF20W-SB-2424V 0.7A± 5%± 1% 19.6V ± 0.5V 150mV 68%
27.1V 0.2A (charger)not adjustable± 3%



Mechanical drawing of 20W Dual Output 13.8V Battery Charger Power Supply:





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China (Mainland) | Manufacturer, Trading Company
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