Diode 1n4148 and 1n5819 are very easy to get, and a low cost, versatility of a diode, then what is the difference between the two? Let's take a look.

The 1N4148 is a small, high-speed switching diode that offers fast switching and is widely used in unidirectional conduction isolation, communications, computer boards, television circuits, and industrial control circuits for circuits with higher signal frequencies. It is a very versatile high frequency switching diode. Including DO35, LL34, SOD323, SOT23,0805 packages are.

1N5819 Diode and ordinary diode difference is high frequency, low voltage, high current characteristics, it is widely used in switching power supply, inverter, driver and other circuits for high frequency, low voltage, high current rectification, freewheeling, protection diodes. The 1N5819 features ultra-fast switching losses, low forward voltage drop (low voltage loss), but low reverse voltage, typically less than 60V, for low-voltage (up to 12V) switching power supplies.

1N5819 tube reverse leakage is relatively large, but the capacitor is small, fast. But not 1N4148 fast, after all, 1N4148 is the use of high-frequency detection, rather than rectification.

Through the above description we learned that the role of diode 1n4148 is detected, 1n5819 the role of rectification, which is the main difference between the two.