Electronic Components Purchasing Considerations
Electronic components as an important part of electronic products, electronic components suppliers and manufacutrers are subtly different .Do you know what should buyers know about electronic components purchasing? Procurement process in electronic components selection buyers need to pay attention to the following points.
Know the appearance, model, performance and other parameters
The complete device model includes the main body model, prefix, suffix, package, foot distance, error, material and so on. The device prefix is a relatively large series on behalf of the device, so the phenomenon of ignoring the prefix is slightly less, but ignoring the suffix is more often.
Model suffix, for example, has the following uses:
To distinguish between the details of performance, for example, MAXIM's reset chip MAX706, the same 706, the suffix "S" and "T" on behalf of different threshold voltage, MAX706S threshold voltage of 2.93V, the MAX706T threshold voltage of 2.93V, the MAX706T threshold voltage of 2.93V, the MAX706T threshold voltage of 2.93V, the MAX706T threshold voltage of 2.93V. MAX706S threshold voltage of 2.93V, MAX706T threshold voltage of 3.08V.
To distinguish between the device level and operating temperature such as TI's reference voltage chip TL431, TL431C on behalf of the device's operating temperature is 0 degrees to 70 degrees (civil grade), TL431I on behalf of the device's operating temperature is -40 degrees to 85 degrees (industrial grade), which is suffixed "C" and "I" on behalf of different operating temperatures.
To distinguish the device package form the same TL431, for example, TL431CP on behalf of the PDIP package, TL431CD on behalf of the SOIC package, where the suffix "P" and "D" on behalf of the different packages.
To distinguish between the ordering and packaging TI's reference voltage chip TL431 CD, if the requirement is to purchase by the plate (2500PCS / plate), then you must order by TL431 CDR model, where the suffix "R" on behalf of the plate. Otherwise, according to TL431 CD order, buy back may be a tube (75PCS / tube) of materials.
To distinguish between lead and lead-free, such as ON's comparator chip LM393D ("D" that is SOIC package), if you want to use the lead-free model, you must order LM393DG, where the suffix "G" on the lead-free model, not this The suffix "G" here means lead-free model, without this suffix is leaded model.
The whole network source and inquiry, price comparison
With the development of the Internet, the rapid rise of electronic components online trading platform, a collection of domestic and foreign original manufacturers, well-known agents, spot dealer resources, users can quickly and easily search through the model and compare channels. Dealers according to the demand documents, in the shortest possible time to put forward a correct and effective offer. And every time the quotation comparison is also the most tired and headache.
MOQ (minimum order quantity): the existence of minimum order is the manufacturer to ensure that the cost (materials, labour, etc.) based on the general standard or custom parts have a minimum order quantity requirements. In the actual procurement of small orders often because the minimum order quantity can not be met, the manufacturer due to a small number of order losses and the phenomenon of refusal.
MPQ (Minimum Packaging Quantity): Sometimes always in SPQ( Standard Packaging Quantity),Due to the high degree of automation in the production of standard components, the packaging process is also completed using fully automated or semi-automated equipment. In order to meet the production efficiency of automated equipment and save packaging materials and transport costs, suppliers to develop the minimum packaging is necessary. For relatively small demand for procurement manufacturers, such as the plan demand for several thousand finished products for the enterprise, procurement of a tray of 10K components means that the funds temporarily, inventory backlog and waste. Now this situation will not have to worry about, now do a good job of the supplier is able to provide unpacking purchase services, retail can also be.
Review the supply qualification
Supplier qualifications include: business licence, tax registration certificate, product agent authorization certificate, supply quality assurance agreement, product testing certificate, production license, manufacturer's quality assurance system certification, special product industry certification, and so on.
Large enterprises usually have a special department for the procurement of components for electronic component identification and testing, but most small and medium-sized enterprises often do not have the ability to do so. Today's components market is mixed, it is difficult to distinguish between the genuine and the fake, the market is filled with a variety of fake, inferior products. Select the right electronic components supplier procurement platform, can reduce the chances of product quality problems.
Confirm the delivery date and trading Terms
Delivery requirements include the buyer's time needed to purchase the product, and how much time the seller needs to prepare samples, the first batch of small quantities of production, and the normal time to order production time required. Although the supplier can be based on the buyer's requirements to cooperate, but the length of the delivery period is related to the price of the purchased products, the buyer should be based on the actual need to put forward the requirements, rather than the pursuit of timely delivery.
Determine the mode of transport and delivery
Domestic sale of the delivery method is often railway, road-based, international procurement in the place of delivery and delivery method determines the calculation of price. If the seller is required to CIF offer (CIF price of goods in the composition of factors including from the port of shipment to the agreed port of destination of the usual freight and insurance premiums agreed), regardless of sea or air transport, transport costs and insurance premiums agreed to be borne jointly or by one party. There are different billing methods depending on the distance to be travelled, and suppliers usually quote on the basis of sea freight, as it is the most economical way of delivery.
Electronic components are generally divided into domestic and imported. Domestic general procurement process: looking for manufacturers (can be searched through the network and other channels for manufacturers) - quotation - sampling - price comparison (bargaining) - order - follow up - feeding - quality control - abnormalities - reconciliation and so on. Foreign imports need to find the original agent or distributor through the component brand, and then choose the most favourable way of communication to contact the quotation - sampling and so on. There is also a trader procurement, they will find the lowest price from various channels of similar products, sales and then sold to customers to earn the difference.
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