The BSR43 from Lision Technology is a Bipolar Junction Transistor with Emitter Base Voltage 5 V, Collector Base Voltage 90 V, Collector Emitter Breakdown Voltage 80 V, Collector Emitter Voltage 80 V, Continuous Collector Current 1000 mA. Tags: Surface Mount, NPN Transistor. More details for BSR43 can be seen below.