1N4148 signal diode
The 1N4148 is a standard silicon switching signal diode. It is one of the most popular and long-lived switching diodes because of its dependable specifications and low cost. Its name follows the JEDEC nomenclature. The 1N4148 is useful in switching applications up to about 100 MHz with a reverse-recovery time of no more than 4 ns. History. Texas Instruments announced the 1N914 diode in 1960. It was registered at JEDEC by Texas Instruments no later than 1961, and was second-sourced by 11 manufacturers that same year. The 1N4148 was registered at JEDEC in 1968  as a silicon switching signal diode for military and industrial applications. It was second-sourced by many manufacturers; Texas Instruments listed their version of the device in an October 1966 data sheet. Today manufacturers produce the 1N4148, also selling it as the 1N914. These device types have an enduring popularity in low-current applications. Overview. As the most common mass-produced switching diode, the 1N4148 replaced the older 1N914. They differed mainly in their leakage current specification, however, today most manufacturers list common specifications. For example, Vishay lists the same leakage current for both parts: Packages. The JEDEC registered part  numbers 1N914 and 1N4148 were originally only available in an axial package, but over time similar parts became available in surface-mount packages too. Note: Some 1N4148 family surface-mount packages are marked with "T4" text. Specifications. Absolute maximum ratings (stress ratings, consult datasheet for recommended ratings) Electrical and thermal characteristics