So what do these numbers mean? Is one better than the other? Well, the numbers actually represent the package size.

SMD Type Dimensions Watt
SMD5050 5.0mm x 5.0mm 0.24
SMD 2835 2.8mm x 3.5mm 0.15
SMD3528 3.5mm x 2.8mm 0.08

SMD stands for Surface Mount Device. SMD 2835 is the newest SMD configuration and offers the best cost / performance. It is significantly smaller than the SMD5050 and has better heat dissipation.

Advantages of SMD 2835 vs 3528

  • Chip direct conduction fins improve the heat dissipation performance allowing it to withstand higher current (40-60mA)
  • 2-3 times larger heat sink than 3528, allowing excellent heat dissipation
  • Slower light decay of LED chip life
  • Oversized light-emitting surface improves the rate of light up to 90%.
  • Ultra-thin structure solves the 3528’s long-standing problem.
  • 2-3 times higher luminous efficiency than 3528; capable of up to 90-100 Lumens per Watt.
  • The costs have been reduced by up to 20% vs the older 3528 design.