1N4116 (DO35)

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The 1N4116 (DO35) is a type of single-zone zener diode that has several application fields, one of the most popular uses being voltage regulation. Zener diodes achieve this type of regulation by operating in the reverse current breakdown mode, called the Zener effect, in which a voltage across the diode is limited to a value close to the breakdown voltage (VZ) of the zener diode. They are also used as components to protect electronic circuits from overvoltages, as voltage references and other applications where voltage control is needed.

The 1N4116 is an SOD-32 package, with maximum dimensions of 4.32 mm x 3.25 mm x 1.27 mm. Its peak non-repetitive surge power dissipation is 1.5 W and it can handle operating temperature ranges between -65°C to +150°C. It is composed of a highly doped silicon junction and is suitable for general purpose voltage regulation and stabilization. The exact value of the VZ depends on the individual part but is usually between 5.6V to 6.2V.

The 1N4116 diode can be used in a variety of applications such as voltage regulation, voltage protection, current limiting, and switching. The regulation performance of the 1N4116 can be improved by adding a current limiting resistor in series with the diode. A series resistor equal to around 1/1000 of the zener voltage (VZ) can be sufficient. The limitation of the reverse current by this resistor also prevents the zener from entering the avalanche breakdown mode.

For over-voltage protection applications, the 1N4116 diode is used in combination with a PN diode to limit the voltage, preventing the over-voltage from reaching sensitive components such as microprocessors. When operating in the breakdown region, the zener diode can also be used as a voltage reference. By connecting a resistor between the cathode of the zener and ground, a voltage reference is formed as the current through the resistor and the zener can be adjusted.

The 1N4116 is also used as a current limiter. By connecting an emitter-base diode in series with the zener diode, the current through a circuit can be limited. In this configuration, the current flowing through the circuit is limited by the sum of the two diodes. This configuration protects the circuit from high currents that might damage the components.

The 1N4116 can be used as a switching component as well. When used with a P-channel MOSFET, it can be used to control the load of a circuit, turning it on or off. When the voltage of the circuit reaches the zener voltage, the zener begins to breakdown, switching on the MOSFET and connecting the load to the power source. When the zener is not connected, the load is disconnected from the power source.

The 1N4116 is a versatile zener diode, capable of voltage regulation, voltage protection, current limiting, and switching. It is used in a wide variety of applications, ranging from industrial and commercial applications such as vending machines and digital scales to military and aerospace applications. Its SOD-32 package and wide operating temperature range make it an ideal choice for applications that need reliable performance in harsh environments.

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