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orientation of polarised smd components on reels/tapes

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#76050

orientation of polarised smd components on reels/tapes | 23 July, 2016

I want to place smd's by hand from tape strips using a vacuum pump.

What is the orientation of polarised smd components on reels/tapes? Is there a standard manufacturing orientation, or are there variations?

I understand some manufactures have part-tapes joined together by contractors, and sometime with orientation errors.

What is regarded as the left & right side of tapes?

Thank You.

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Tom

#76055

orientation of polarised smd components on reels/tapes | 23 July, 2016

This information is normally available in the component's data sheet (typically toward the end where the packaging is detailed.)

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#76059

orientation of polarised smd components on reels/tapes | 25 July, 2016

There 2 main rival standards for orientation in tape and because you can't really trust manufacturers to stick to one or the other or something else entirely it is always wise to check the datasheet. Typically an SOIC will have pin 1 the same end as the index holes, an SOT device will have its single pin that side as will the cathode on a diode & -ve on a capacitor. Quad packages however are a total crapshoot. You should never ever see orientation errors in spliced part tapes, that would suggest two things: The two tapes are different parts &/or manufacturers. The Tape itself has been reloaded by a 3rd party(badly) - so either it has been sent off for a custom process such as Lead Tinning and Pb free part or they are grey market or second hand parts being passed of as new.

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#76079

orientation of polarised smd components on reels/tapes | 29 July, 2016

The standard you need is EIA-481B. It details the taping of components from 8mm tape up to 200mm tape including component orientations. 8, 12, 16 and 24mm tape has the sprocket holes only on one side so it is easy to determine the proper orientation of the tape in this case (when working with tape strips). Larger tapes will have sprocket holes on one side and slots on the other side. This may require closer attention by the person that is working with these components because visually the sprocket holes and slots need to be looked at very closely

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