So I want to replace a transistor that is in a pre-made circuit. It has a voltage regulator on it, so I can't just put more voltage in the circuit. Can you help me find a transistor that will produce more gain (current draw) whatever at the same voltages as this one: http://pdf.datasheetcatalog.com/datasheet/MitsubishiElectricCorporation/mXvtvyr.pdf