How Does smd led chart Work?

Surface-mounted device light

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The light from white LED lamps and LED strip lights is usually provided by industry standard surface-mounted device LEDs (SMD LEDs).[1] Non-SMD types of LED lighting also exist, such as COB (chip on board) and MCOB (multi-COB).

Surface-mounted device LED modules are described by the dimensions of the LED package. A single multicolor module may have three individual LEDs within that package, one each of red, green and blue, to allow many colors or shades of white to be selected, by varying the brightness of the individual LEDs. LED brightness may be increased by using a higher driving current, at the cost of reducing the device's lifespan.

SMD LED

(module)

Dimensions
(mm × mm) Power
watt) Flux
lumen) CRI

(Ra)

Intensity
candela) Beam angle
degree) Heatsink Efficacy (min)

(lm/W)

Efficacy (max)

(lm/W)

Colors per
SMD package 8520 8.5 × 2.0 0.5 & 1 55–60 80 110 120 Monochrome 7020 7.0 × 2.0 0.5 & 1 40–55 75–85 80 110 Monochrome 7014 7.0 × 1.4 0.5 & 1 35–50 70–80 70 100 Monochrome 5736 5.7 × 3.6 0.5 40–55 80 15–18 120 no 80 110 5733 5.7 × 3.3 0.5 35–50 80 15–18 120 no 70 100 5730 5.7 × 3.0 0.5 30–45 75 15–18 120 no 60 90 5630 5.6 × 3.0 0.5 30–45 70 18.4 120 no 60 90 5060 5.0 × 6.0 0.2 26 no 130 Monochrome or RGB 5050 5.0 × 5.0 0.2 24 no 120 Monochrome or RGB 4014 4.0 × 1.4 0.2 22–32 75–85 110 160 3535 3.5 × 3.5 0.5 35–42 75–80 70 84 3528 3.5 × 2.8 0.06–0.08 4–8 60–70 3 120 no 70 100 3030 3.0 × 3.0 0.9 110–120 120 130 3020 3.0 × 2.0 0.06 5.4 2.5 120 no 80 90 3014 3.0 × 1.4 0.1 9–12 75–85 2.1–3.5 120 yes 90 120 2835 2.8 × 3.5 0.2 14–25 75–85 8.4–9.1 120 yes 70 125 1206 1.2 × 0.6 3–6 55–60 1104 1.1 × 0.4 Comparison of SMD LED modules used on an LED strip light[2]

References

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SMD LED STRUCTURE AND DESIGN

SMD LEDs are rectangular in shape and consist of three cells. These cells contain a luminescent element (semiconductor crystal) that produces light when current flows through it.

To protect the SMD cells, resins are used to completely cover the upper part. These resins for SMD are available in various colors and shades.

Depending on the number of cells in the SMD led, it will have a certain number of contacts for welding. For a single-color LED, one of them is always the anode (+) and the other will be the cathode (-). In the case of an SMD RGB LED it usually has a cathode contact and an anode for each luminescent element. Depending on the manufacturer and the LED specification, the configuration and number of connection points can vary.

SMD LED SIZES

Depending on their size, LED types are classified with a 4-digit number: the first 2 digits for the length and the next 2 for the LED height in tenths of a millimeter. For example, a 5050 led is 5x5mm. The following table shows the most commonly used SMD LED types:

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