How do I compare quotes from different PCBA suppliers

The designer needs to clarify the part number of each material in the BOM file and define the design parameters of PCB. Even if the same PCBA, the materials used are different, the final offer is different. Therefore, ensure that suppliers are committed to meeting quality standards and delivery times so that costs are fully considered.

PCBA mainly includes a series of processes such as component procurement, PCB production, SMT patch processing, DIP plug-in and PCBA testing. The processes involved are relatively complex, and the PCBA quotation is also relatively complex. Generally speaking, PCBA costs include PCB board costs, PCB test costs, PCB engineering costs, component procurement costs, SMT/DIP welding costs, PCBA test costs, assembly engineering costs, special packaging and logistics costs.

Component procurement can adopt online procurement and offline procurement, with the rise of e-commerce, online procurement has become the first choice of more and more enterprises and individuals. There are many electronic components suppliers on the e-commerce platform, a wide variety of goods, and the price is relatively affordable. The advantage of online procurement is that it is convenient and fast, which can effectively reduce the procurement cost and shorten the procurement cycle. But at the same time, we should also pay attention to false advertising, fake goods, price opacity and other problems, it is recommended to choose formal channels of suppliers for procurement. Offline procurement For enterprises that need to purchase a large number of electronic components or individual users with special needs, offline procurement is also a good choice. Offline procurement can be purchased directly to the market or the manufacturer, see the product with your own eyes, check the quality and quantity, and it is easier to avoid risks in procurement. However, its disadvantage is that it takes a long time, and it generally takes more time and energy to collect market information, rush about traffic, and run interpersonal relationships.

PCB price and quality are key factors in determining the choice. The quality of PCB is not only related to product performance, but also related to the stability and life of electronic products, there are many PCB manufacturers on the market, their prices vary greatly, but their quality and service are not different. When choosing a PCB manufacturer, we need to establish a balance between price and quality. First of all, we need to determine the multilayer thickness and size of the PCB board and the requirements, and determine the price according to the actual quotation of the manufacturer. Secondly, we need to see whether the manufacturer meets the ISO9001 quality system certification and UL certification, and also check the manufacturer's reputation and feedback in the industry. In addition, you can apply for PCB samples from manufacturers for inspection and testing to understand the quality of their products.

The base cost of SMT patches usually includes labor costs and equipment depreciation costs. The labor cost mainly depends on the number of operators required in the process and their salary level. Equipment depreciation expenses are calculated based on factors such as the purchase price, service life and maintenance cost of the equipment. Experienced workers need to be hired to ensure the quality of the product, and the price difference can make a big difference. At the same time, it will also be affected by the processing difficulty and process requirements, if the processing difficulty of the product is higher, such as the need for precision mounting, complex welding, lead-free welding, high temperature aging, etc., then the corresponding processing costs will also increase, and the order volume and delivery time will also affect the cost.

DIP processing prices are generally calculated according to the point, depending on the complexity of the PCB board to determine the price, these can be negotiated. When the production volume is small, a small amount of minimum consumption standards will be charged, after all, there are too many labor costs, start-up costs and so on.

The cost of PCBA test is mainly test labor cost, fixture, auxiliary material, the cost of testing labor is about 40 yuan per hour, the cost of making test fixtures mainly depends on the market, the auxiliary material is mainly oscilloscope and computer and other equipment, the PCBA test cost can be obtained by adding them.

Finally, look at the service, service attitude is one of the key factors of whether a PCBA manufacturer is excellent, but also a good beginning of cooperation, a good manufacturer not only to provide high-quality products, but also need to provide excellent after-sales service and happy cooperation. We can understand the quality of service through telephone, email, online chat and other technical consultation methods provided by the manufacturer.