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How to chose a suitable EMS service supplier for PCB prototypes ?
When designer make a new design, they want to quickly start the fabrication for prototypes; PCBA fabrication takes lots of time, if there are reliable PCBA OEM manufacturer, can do the one site service from PCB, Components purchase and SMT&DIP Assembly also PCBA function testing; The design engineer will have more time for the design works and can focus on the products; But no need to divert their attention to the fabrications.
But the situation is most of the EMS manufacturer prefer to do the large quantity PCBAs, not willing to fabricate the prototypes. Why? Reasons following:
1. Time is Money, the sample PCBA fabricate need much more transform for SMT line; If there are more transform for SMT lines, the production efficiency is Lower. Each products need materials loading, SMT Machine setting, it will take about 2 hours for each transform.
2. Components are difficult to purchase; There are MOQ for some of the components, if you sourcing more, it will no use in near future. Might be stock for a long time.
3. The purchase work and time for mass order or PCB prototypes are same, so it will be need more work for buyers ,if same value components purchase.
To chose a suitable EMS supplier, you can searching by B2B website such as :alibaba.com; Made-in-china.com;globalsources.com
1)Each supplier have there advantage, you need to chose a company that willing to do the PCBA prototypes; Such as MOKO TECHNOLOGY LTD.
2)If the PCBA suppliers pay high attention for each project, if they have a sales engineer to track the project? And to reply your engineer questions in time.
3)You need to check if they can doing 100% AOI Testing for PCBAs.
4)If they can doing 100% Function testing for each PCBAs.
5)Over 96% pass rate for PCBA productions
6)Fast PCBA supplier can doing each project in less than 25 days.
Hope these information are helpful for you to chose a reliable PCBA suppliers.
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