The 2SD1766-P from SeCoS Corporation is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Emitter Cut off Current 1 µA, Collector Base Voltage 40 V, Collector Cut off Current 1 µA, Collector Emitter Breakdown Voltage 32 V. Tags: Surface Mount, NPN Transistor. More details for 2SD1766-P can be seen below.