The 2SD2661T100 from ROHM Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Emitter Cut off Current 100 nA, Collector Base Voltage 15 V, Collector Cut off Current 100 nA, Collector Emitter Breakdown Voltage 12 V. Tags: Surface Mount, NPN Transistor. More details for 2SD2661T100 can be seen below.