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BD139 NPN power transistors great for whenever you need to control medium to high-power electronics such as audio, radio, ect. Vceo: 80V; Collector DC current: 1.5A; Power(Max): 12.5W; Number of pins: 3; Package type: TO-126. Can switch up to about 80V at peak currents of 1.5A (not continuously, just peak!) Stable performance, fit for electronic DIY project, fit for electronic professionals and enthusiasts, they are also good replacements for your broken ones. Package Includes: 20 pieces BD139 NPN power transistor.