Difference between 1N914 and 1N4148 diodes
For a number of devices digikey (notably Fairchild) lists the leakage current for the 1N4148 as 5 &micro;A, the same as the 1N914. But for others (e.g. NXP) the leakage current is only 25 nA. Which would make the 1N4148 a better alternative to the 1N914.