What Is an SMD LED?

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What Is an SMD LED?
SMD LEDs can be used to illuminate traffic lights. (led image by sasha from Fotolia.com)

Light bulbs are devices that emit light when heated. They can be incandescent or lit by LED (light-emitting diodes). An LED bulb may be manufactured as an SMD, or surface mounted device.

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Definition

SMD LEDs are light-emitting diodes in which the elements of the diodes are mounted directly onto the surface of printed circuit boards. A printed circuit board is a flat board used to electrically connect and support electronic components. LEDs are bulbs that fit into an electric circuit and are illuminated by the movement of electrons.

Applications

SMD LEDs can be used for aviation and automotive lighting applications and in traffic signals. SMD LEDs are also used to light up watches, transmit information from remote control units and form numbers on digital clocks.

Advantages

Some advantages SMD LEDs have over incandescent bulbs include less energy consumption and longer lifetime. SMD LEDs are also typically smaller than incandescent light bulbs, have greater durability due to sturdier design, and use faster switching. Switching occurs when an electrical circuit is diverted from one conductor to another.

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