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.