Function : SILICON NPN TRANSISTORS
Maker : STMicroelectronics
The 2N3439 and 2N3440 are silicon epitaxial planar NPN transistors in jedec TO-39 metal case designed for use in consumer and industrial line-operated applications.
These devices are particularly suited as drivers in high-voltage low current inverters, switching and series regulators.
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Others datasheet of same file : 2N3439,2N3440