The BSS138 MOSFET N Trench 50V 220mA 1.5V @ 1mA 3.5 O @ 220mA, 10V SOT-23 RoHS manufactured by Blue Rocket is a low-voltage, low-power MOSFET transistor designed for switching and amplification applications. It has a maximum voltage of 50 V, and a continuous drain current of 220 mA. Its gate threshold voltage is 1.5 V @ 1 mA and its output impedance is 3.5 O @ 220 mA. This MOSFET is packaged in a SOT-23 package, which is RoHS compliant.