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-SAW02
Model Number: KRE-0422003

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









Power: 9W
input: 100V~240V~50/60Hz 0.3A
output: 4.2V-2,000mA

AC/DC power adapter protection:
Over-voltage protection
Over-current protection
Short-circuit protection
Thermal shutdown capability




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




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




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




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




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




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