Toshiba RN1506(TE85L,F) Dual NPN Digital Transistor, 50 V, 5-Pin SSOP, Mounting Type: Surface Mount, Transistor Configuration: Common Emitter, Maximum Emitter Base Voltage: 5 V, Number of Elements per Chip: 2, Dimensions: 2.9 x 1.6 x 1.1mm, Minimum Operating Temperature: -55 °C, Maximum Collector Emitter Saturation Voltage: 0.3 V, Typical Resistor Ratio: 0.1