LED university
About SMD & DIP LEDs
Author: Jack Chow    Date: 2015-7-1

 About SMD 

SMD (Surface Mounted Diode): surface mount diodes or surface mount components are its name, SMD also has a variety of categories: 
By size: 3528,5050,0603,0805,1210,5060,1010 and so on. Generally, SMD are diamond-shaped, so its name is based on the size L * W, the LED industry use units of inches and metric to maned the different SMDs.
The color and type of colloid are the same as common LED, only the shape of the product changed.
the following are the detailed description for these specifications:
SMD 0603 (inch): conversion to metric is 1005, means the length of LED components is 1.0mm, width 0.5mm. So by metric it is called SMD 1005, By inch, it is called SMD 0603.
SMD 0805 (inch): conversion to metric is 2125, means the length of LED components is 2.0mm, width 1.25mm. So by metric it is called SMD 2125, By inch, it is called SMD 0805.
SMD 1210 (inch): conversion to metric is 3528, means that the length of LED components is 3.5mm, width 2.8mm. So by metric it is called SMD 3528, By inch, it is called SMD 1210.
SMD 5050 (metric): This is called by the metric, means that the length of LED components is 5.0mm, width 5.0mm.
SMD 3528 (metric): This is called by the metric, means that the length of LED components is 3.8mm, width 2.5mm.
SMD LEDs are small, solid state, high-intensity chips which when used for lighting are highly energy efficient, and deliver a vastly superior lighting experience. SMD is the latest form of packaging for LEDs or Light Emitting Diode. Also with lower light decay than strawhat and super flux LEDs.
About DIP LEDs
In microelectronics, a dual in-line package (DIP), sometimes called a DIL-package (for Dual In Line-package),[1] is an electronic device package with a rectangular housing and two parallel rows of electrical connecting pins.
The pins are all parallel, point downward, and extend past the bottom plane of the package at least enough to be through-hole mounted to a printed circuit board (PCB), i.e. to pass through holes on the PCB and be soldered on the other side.
DIP is sometimes incorrectly considered to stand for dual in-line pin, in an effort to justify the redundant term "DIP package" (Dual in-line pin would imply one line of two pins). Generally, a DIP is relatively broadly defined as any rectangular package with two uniformly spaced parallel rows of pins pointing downward,
whether it contains an IC chip or some other device(s), and whether the pins emerge from the sides of the package and bend downwards or emerge directly from the bottom of the package and are completely straight.
In more specific usage, the term refers only to an IC package of the former description (with bent leads at the sides.)
A DIP is usually referred to as a DIPn, where n is the total number of pins. For example, a microcircuit package with two rows of seven vertical leads would be a DIP14. The photograph at the upper right shows three DIP14 ICs.
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