The STB1277-O from SeCoS Corporation is a Bipolar Junction Transistor with Emitter Base Voltage -5 V, Base Emitter Saturation Voltage -1 V, Emitter Cut off Current -0.1 µA, Collector Base Voltage -30 V, Collector Cut off Current -0.1 µA. Tags: Through Hole, PNP Transistor. More details for STB1277-O can be seen below.