The 1N4148,113 is a high-speed Switching Diode features fabricated in planar technology.
The 1N4148 from NXP is an axial leaded high speed switching diode. These diodes are fabricated in planar technology and encapsulated in hermetically sealed leaded glass. Switching diodes are single PN junction diodes which works similar to switch and are based on discrete package. 1N4148 is commonly used for high speed switching applications.
The 1N4148 from Fairchild is an axial leaded small signal diode. This diode features unidirectional configuration.