The BSR41-QX from Nexperia is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Base Emitter Saturation Voltage 1 to 1.2 V, Emitter Cut off Current 100 nA, Collector Base Voltage 70 V, Collector Cut off Current 50 µA. Tags: Surface Mount, NPN Transistor. More details for BSR41-QX can be seen below.