300W 12VDC Non-Dimmable Class P Class 2 Type HL Standard constant voltage LED driver UL/cUL.




300W 12VDC Non-Dimmable Class P Class 2 Type HL Standard constant voltage LED driver UL/cUL. MRS-12V300W-NVWJ-2


  • Output constant voltage
  • UL/cUL listed, Class 2, Class P, Type HL approval
  • Input voltage range: 100-277VAC
  • Built-in PFC function / PF>0.99
  • Efficiency >87%
  • Protections:short circuit/over voltage/over heat
  • 1.0 version suitable for dry & damp location
  • 2.0 & 3.0 version suitable for dry, damp & wet location
  • Cooling by free air convection
  • Suitable for LED lighting and moving sign applications
  • ·Compliance to worldwide safety regulations for lightings
  • 7 Years Warranty


Model MRS-12V300W-NVWJ-2
Output DC Voltage 12V
Voltage Tolerance ±0.5V
Voltage Regulation ±0.5%
Load Regulation ±1%
Rated current 25A (multi current 5*5A)
Rated power  300W (5*60W)
Input Voltage Range 100-277VAC
Frequency Range 47~63HZ
Power Factor (Typ.)@full load 0.95@120VAC  0.95@277VAC
THD(Typ.)@full load <20%
Inrush Current(Typ.) 35A (twidth=960us) @120VAC ;  43A (twidth=1ms) @277VAC 
Efficiency(Typ.)@Full Load  86%@120VAC   90%@277VAC
AC Current(Typ.) 3.6A@100VAC
Leakage current <0.50mA  
Protection  Short Circuit shut down o/p voltage, re-power on to recover after fault condition is removed
Over load ≤120% constant current limiting, auto-recovery
Over temperature 100℃±10℃ shut down o/p voltage, automatically recover after cooling.
Environment Working TEMP. -40~+60℃
Working Humidity  20~90%RH,non-condensing
Storage TEM.,Humidity -40~+80℃,10~95%RH
TEMP.coefficient ±0.03%/℃(0~50℃)
Vibration 10~500Hz 2G 10min./1 cycle,period for 60min.each along X,
Y,Z axes
  Safety standards UL8750+UL1310
  Withstand voltage I/P-O/P:1.88KVAC  
  Isolation resistance I/P-O/P:100MΩ/500VDC/25℃/70%RH
Safety&EMC EMC EMISSION FCC 47 CFR Part 15 ,Subpart B
  EMC IMMUNITY  EN61000-4-2,3,4,5,6,11(Surge 4KV)
Others Weight 2.2Kg  
Size 1.0 version: 301*108*46mm   /   2.0 version: 301*130*46mm 
3.0 version: 301*140*45mm
packaging 330*220*245mm/8pcs /CTN    G.W.:21.08KG/CTN
385*335*200mm     20PCS/CTN
Notes 1. All parameters NOT specially mentioned are measured at 110V & 277VAC input , rated load and 25℃ of ambient temperature.  
 2.Tolerance:includes set us tolerance,line regulation and load regulation.   

※Input:18AWG Black and White to be connected to AC L and N ,Green wire go ground,

※Output cable 2*16AWG,Red" (+) to LED Positive side (+) , "Black"(-)  to LED Negative side (-).

Note:  Class 2 standard output terminal. Three groups of cables for SMT-012-300VWJ2, SMT-012-300VWJ2V2, SMT-012-300VWJ2WV2 ; two groups for SMT-024-288VWJ2,SMT-024-288VWJ2V2,SMT-024-288VWJ2WV2

■Derating Curve

※To extend their life, please refer to the Derating Curve and derate according to the temperature.

■ Connecting Diagram

Simple Connection Diagram:


※This driver should be installed by qualified and professional person;

※Please make sure the driver is installed with adequate ventilation around it to allow for heat dissipation.

※Ensure that wiring is correct before test in order to avoid light and power supply damage;

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