Csldmcml 10 Values 52pcs High Quality Positive Voltage Regulator Assortment Kit. Specifications: Product Name: Positive Voltage Regulator Package Quantity: 52pcs Packed in A Rugged Convenient Re-sealable Plastic Storage Case. Package Included: 5pcs-------LM317T 7pcs-------L7805 5pcs-------L7806 5pcs-------L7808 5pcs-------L7809 5pcs-------L7810 5pcs-------L7812 5pcs-------L7815 5pcs-------L7818 5pcs-------L7824 A three-terminal voltage regulator is a semiconductor device that has a very high resistance until a critical reverse breakdown voltage. When the voltage regulator is in reverse breakdown, within a certain current range (or within a certain power loss range), the terminal voltage is almost constant, showing a voltage regulation characteristic, so it is widely used in a regulated power supply and limiting circuit