1N4744CPE3/TR12

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The 1N4744CPE3/TR12 diode, which is part of the Zener - Single category, is designed to limit the voltage applied to sensitive electronic components. It is a small, general-purpose Zener, identical in shape and size to standard 1N400x rectifiers, but with a different junction.

A Zener diode is a special type of semiconductor diode that exhibits an avalanche breakdown or breakdown region at a specific reverse-bias voltage. The 1N4744CPE3/TR12\'s breakdown voltage is 12 volts. This allows the diode to be used for voltage regulation or for protection strategies such as in-rush current limiting, suppressing transients, and clamping.

The 1N4744CPE3/TR12 can be used in many applications. Some examples are:

• Unstable power supply circuits: they can stabilize voltages;
• Bypassing applications: they can act as a constant voltage source in the bypassing circuit;
• Protection components: they can be used in TV sets as a protective component to prevent high voltage damage to other parts;
• RF electronic circuits: it can be used to match the voltage requirements of different parts in the circuit to prevent burnout.

When using the 1N4744CPE3/TR12, best results will be achieved when the protective resistor is used in junction with it. This ensures no more than 5 mA of current flows through it at any given time, and therefore keeps the diode operating within the normal parameters.

The 1N4744CPE3/TR12 operates best in a temperature range of – 65°C to 150°C. At temperatures lower than – 65°C, the diode’s avalanche region may become narrower. At very high temperatures exceeding 150°C, the diode’s zener voltage will decrease.

In most cases, the 1N4744CPE3/TR12 works on the basis of a three-layer reverse-biased PN junction. It begins to conduct after the avalanche voltage is reached, usually somewhere between 20V and 1000V depending on the size of the intrinsic depletion layer. At this point, the junction works as a controlled rectifier, allowing enough current to flow in one direction.

The 1N4744CPE3/TR12 can also work as a voltage limiter. It is designed to clamp voltages above its breakdown voltage. When the voltage exceeds its breakdown voltage, the diode will begin to conduct in both directions, allowing current to flow from anode to cathode until the excess voltage is reduced. In this application, the 1N4744CPE3/TR12 acts as a shunt, limiting the voltage increase to the breakdown voltage.

The 1N4744CPE3/TR12 is highly reliable and cost-effective diode, perfect for the given applications. It is designed to be used in a variety of electronic devices, including power supplies, RF equipment and TV sets, providing a stable voltage for sensitive components. Its wide breakdown voltage ensures reliable operation and its compact size makes it a suitable component for various applications.

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