01. Parts Overages

Proper SMT machine setup and operation requires parts overages. Unused and excessive parts supplied by you or purchased by us will be packaged and returned to you with the assembled boards.
SMT parts which are not supplied on the reels should be on one continuous strip of tape.
If you need to assemble the same SMT part in different boards, do not cut them into strips, please keep them in the continuous strip of tape or on the reels. Resistors, Capacitors, Diodes (0603, 0805, 1206, 2225, SOT, SOD, MELF - packages) require a minimum of 50 pieces and have to exceed the required quantity by 30 pieces. (E.g. 40 pieces will require 70 additional pieces –
this meets our minimum of 50 pieces plus 30 pieces over assemble quantity requirement).
Resistors, Capacitors, Diodes (0201, 0402, MiniMelf, miniature packages) require a minimum of 100 pieces having to exceed the required quantity by 50 pieces.(E.g. 80 pieces will require 130 additional pieces - this meets our minimum of 100 pieces plus 50 pieces over assemble quantity required).
A small number of excesses (1-5 pieces based on the total quantity of assemblies) are requested for expensive parts such as IC, BGA, QFP, Connectors, etc., this will ensure smooth assembling and shipping of your assembled boards on time.
For further information contact us at service@PCBSEA.com or seek help through our 24 hour online customer service.

02. Panelization

If your PCB dimensions are smaller than 50mmx100mm or if your PCB is of any shape
(other than rectangle) your boards must be panelized in an array for assembly.
As we also fabricate your PCB for you; once we start fabricating your board we will have the panelization file (solder paste data),
we will transfer the data to our PCBA department to create the stencil which will match the panelized PCB.

03. Break-away Rails (Break-away Tabs)

If the clearance between the board edges and copper features is less than 3.5mm (138mil),
or your boards need to be panelized for some reason,
break-away rails (Break-away tabs) must be added at the two longer parallel edges of the boards to ensure that the boards can be assembled by the machine.