The MMBT3906TB_R1_00001 from PANJIT Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage -5 V, Base Emitter Saturation Voltage -950 to -650 mV, Collector Base Voltage -40 V, Collector Cut off Current -50 nA, Collector Emitter Breakdown Voltage -40 V. Tags: Surface Mount, PNP Transistor. More details for MMBT3906TB_R1_00001 can be seen below.