To begin with, the safest place to purchase 10pcs BT137S-600D TO252 BT137 600D TO-252 BT137S-600 DPAK BT137S 600D SMD new original online is directly from the manufacturer’s site. You already know you’ll be getting a genuine good and you’ll qualify for each of the warranties and guarantees the fact that the good maker usually provides. Expensive good companies are usually pretty old school, which means that they rely on a network of distributors and have for several years. That means those distributors generally offer the sales and the ideal online prices. The price around the watchmaker website is usually above walking into a store. In either case, always check the manufacturer’s web page first, it takes only a few short minutes and you can get what you want straight from the source.