Small Signal Switching Diodes, ON Semiconductor1N4149: High Conductance Fast DiodeApplicationsThis product is general usage and suitable for many different applications.Diodes and Rectifiers, ON SemiconductorWhether you are working on a new design, or purchasing, ON Semiconductor provides you with industry-standard diodes and rectifiers, small signal diodes, Schottky and Zener diodes. The components offer the best available combination of quality, features, and packaging options.