1N4003E-E3/73

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A 1N4003E-E3/73 is an example of a single rectifier diode, an electrical component made up of two terminal leads, or electrodes, with a series of anodes, cathodes, and supporting structures in between. Composed mainly of silicon or germanium, these devices are built to control and regulate the direction, intensity, and phase of electrical power flowing through a circuit. The 1N4003 specifically is designed as a switching diode, and as such has several specific applications, as well as an important working principle.

The 1N4003E-E3/73 rectifier diode is most commonly used as a basic reed switch contact closure device. A reed switch is essentially a type of form contact switch, which is composed of two small and narrow ferromagnetic metal reeds, which are sealed in airtight glass contact forms. When a current or magnetic field is applied to the switch, the two reeds will be drawn together with a strength proportional to the applied force. By wrapping a diode around the reed switch contact form, it serves to protect the switch from damage due to isolated reverse voltage.

Additionally, the 1N4003E-E3/73 is also used to protect other components in a circuit from over voltage. The diode is designed with a volts breakdown rating of seventy-three, meaning it can withstand up to that much volts before it needs to be replaced. Moreover, the 1N4003E-E3/73 is a good choice for applications that require higher currents than a regular rectifier diode can handle as it is designed to carry currents of up to three hundred milliamperes.

The basic construction of a diode consists of two layers: an anode and a cathode. Electron flow between the anode and cathode can move in one direction but not the other, allowing it to regulate the flow of current through a circuit. This is known as rectification, since the purpose of a rectifier device is to convert alternating current (AC) to direct current (DC). The 1N4003E-E3/73’s primary purpose is to block any current flowing \"backwards\" through a circuit – its useful for protecting against any unexpected down surge of power.

Dimensions for the 1N4003E-E3/73 are 7.9 millimeters by 7.51 millimeters, or 0.3 inches by 0.3 inches. The diode has a nominal forward voltage drop across its two wires of between 0.887 and 0.9 volts. The forward current at 75°C can handle up to three hundred milliamperes and the Leakage current at the same temperature is 0.02 mA. The rate of reverse recovery time is 0.6 µs

In summary, a 1N4003E-E3/73 single rectifier diode is designed primarily as a switching diode used mainly as a reed switch contact closure device, or to protect other components in a circuit from overvoltage. This diode has a volts breakdown rating of seventy-three and can carry currents of up to three hundred milliamperes. Its dimensions are 7.9 millimeters by 7.5 millimeters and has a nominal forward voltage drop across its two wires of between 0.887 and 0.9 volts.

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