The MPSA44 with Transistors is a NPN semiconductor device with a maximum 300mA current rating, a 400V voltage rating, and a TO-92-3 package type. The device is made by Semtech and is RoHS compliant. It features a fast switching action, low collector-emitter saturation voltage, and low leakage currents. The device is commonly used in motor control circuits, voltage converters, and power management applications. It is a cost-effective alternative to higher performance transistors.