27-37VDC 900mA constant current LED power supply , Open frame type switching power supply, ITE, CLASS B
P/N: KRE-OPS24
Model: KRE-3700090D

General: 27-37VDC 900mA series open frame type power supply




Power: 34W
Input:AC 100-260V 50/60Hz
Output voltage: DC27-37V
Output current: 900mA
Inrush current (240V AC): 25A, cold 25°C
Efficiency: 80% maximum
Output voltage precision: 5%
Ripple/noise: 100mV
Regulation: ±1% line, ±5% load




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




Isolation Distance: 
input and output interval, input and enclosure, output and enclosure 2,000V AC/3S
Working temperature and humidity: -10 to +60 degrees Celsius, 20 to 90% RH
Store temperature and humidity: -20 to +85 degrees Celsius, 10 to 95 %RH

With RoHS, CE, UL marks
100% full load burn-in test
Protections: short circuit/overload/over-temperature




2 years warranty
High efficiency
High reliability
10 years of industry experience
3 to 360 watts for your customized requirment
Average working no trouble ＞50,000 hours
Product Electric Parameters




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




Over-current protection
Short-circuit protection
Thermal shutdown capability
Over-load protection
105% - 150% rated power, automatic recovery Over-voltage protection
105% - 150% of the rated voltage



height above sea level
Leq 2000M
cooling method:
Natural cooling air convection 
working temperature
- 20 ° ~ 60 ° c / 20% ~ 90% RH (no frost) 
Storage temperature
- 40 ° ~ 85 ° c / 10% ~ 95% RH (no frost




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