1N4148 signal diode 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.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: 25 nA at -20 V, 25°C 5 μA at -75 V, 25°C 50 μA at -20 V, 150°C produce the 1N4148 and sell it as either part number. It was second-sourced by many manufacturers; Texas Instruments listed their version of the device in an October 1966 data sheet . These device types have an enduring popularity in low-current applications.registered part numbers 1N4148 and 1N914 are diodes in an axial package. Diodes with similar properties are available in surface-mount packages. LL4148 in MiniMELF package. 1N4148W in SOD-123 package. 1N4148WS in SOD-323 package. 1N4148WT in SOD-523 package. Specifications Absolute maximum ratings VRRM = 100 V IO = 200 mA IF = 300 mA If = 400 mA IFSM = 1 A at 1 s pulse width ; 4 A at 1 μS pulse width VF = 1 V at 10 mA VR = 75 V at 5 μA; 100 V at 100 μA trr = 4 ns PD = 500 mW
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