The 1N4148W-E3-18 with Diodes - General Purpose, Power, Switching 100 Volt 500mA 4ns from Vishay is a general purpose switching diode designed for a wide range of applications. It is a silicon diode with an epoxy encapsulated body and a maximum current rating of up to 500mA. The forward voltage drop is a mere 0.7 volts and the minimum switching speed is 4ns, making it an excellent choice for fast logic gates, power switching applications, and other uses where fast response time is required. The diode is rated to handle a maximum peak reverse voltage of up to 100V and is highly reliable with a wide temperature range and low leakage current.