Diodes Incorporated, as one might surmise, offers a wide array of various types and forms of diodes ranging from TVS to rectifier to zener. A question we see sometimes with their products is the meaning of a “-W” suffix on them, as in the example case of 1N4148WS-7-F-W. What does this suffix call out, and does it affect the functionality of the products?
For these products, the ‘W’ suffix doesn’t have any impact on performance. The ‘W’ indicates the product is manufactured in Taiwan, while the lack of a ‘W’ means it’s manufactured elsewhere.