The DI2579N from Diotec Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 9 V, Base Emitter Saturation Voltage 1 V, Collector Base Voltage 9 V, Collector Emitter Voltage 400 V, Continuous Collector Current 1 A. Tags: Surface Mount, NPN Transistor. More details for DI2579N can be seen below.