4.2V 2A series External wall-mount switching power supply(AC/DC adapter, AC/DC power adapter), Class II, Universal input, customized design.
P/N: KRE-SAW09
Model Number: KRE-0422000









Power: 9W
input: 100V~240V~50/60Hz 0.3A
output: 4.2V-2A

Model Number: KRE-XXXYYYZ
"XXX"=030-480, The output voltage is DC3.0-48.0V,
"YYY"=001-450, The output current is 0.01-4.5A,
"Z" representing the input plug, 0-European plug, 1-British plug, 2-the Australian plug, 3-USA plug, 4-Japan plug, 5-China plug, 6-Korea plug.  

General: 4.2V 2,000mA series switching power supply adaptor




Thermal shutdown capability
Over temperature protection
Over-voltage protection
Over-current protection
Short-circuit protection




Input voltage: 100 to 240V AC
Input frequency range: 50 to 60Hz
No load input power (240V AC): 0.3W
input current: 300mA maximum
Inrush current (240V AC): 25A, cold 25°C
Efficiency: 70% to 90% maximum




DC output voltage: 4.2V DC
DC output current: 2,000mA
Regulation: ±1% line, ±5% load
Output voltage precision: 5%
Ripple/noise: 100mV
Dc connector : 2.1X5.5mm , 2.5X5.5mm , optional
DC output cord AWG: With cable
Wire length: 1.5m




UL1310, GB4943-2001
CE(Low Voltage Directive)
AS/NZS 60950:2000, AS/NZS60065
PSE IEC60950, EN60065
EN60950:2009; EN60065




IEC61000-4-2; IEC61000-4-3
IEC61000-4-4; IEC61000-4-5
IEC61000-4-6; IEC61000-4-11
EN55024/A1:2001
GB9254-1998/GB17625.1-2003
EN55022 Class B
CISPR22 Class B
CNS13438 Class B
FCC Part15 Class B
AS/NZS3548, AS/NZS4251.1 class B




High reliability
High efficiencyn
With fuse, LED light indicator
Light and convenient plug-in
low working temperature and low ripple noise




Storage temperature: -20 to 65°C
Storage humidity: 10 to 95% RH
Operating temperature: 0 to 40°C
Operating humidity: 10 to 95% RH




Burn-in: 100% full load, 40°C, 4hrs minimum
Leakage current: 0.25mA maximum at 264V AC
Withstanding voltage: 3kV 1minute 10mA max, between primary and secondary
MTBF: meet MIL-HDBK-217F over 50,000hrs, full load, 25°C