The CMUT5551TR from Central Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 1 V, Collector Base Voltage 180 V, Collector Cut off Current 50 µA, Collector Emitter Breakdown Voltage 160 V. Tags: Surface Mount, NPN Transistor. More details for CMUT5551TR can be seen below.