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1N5949PE3/TR12 - Diodes - Zener - Single

The 1N5949PE3/TR12 is a diode, or two-terminal electronic component, and belongs to the Zener -Single class. In electrical engineering, a Zener diode is a type of diode that is designed to have an extremely low forward voltage drop and can be used to regulate a low voltage. These types of diodes are especially useful when performing voltage regulation in switching voltage regulators and as voltage references. The 1N5949PE3/TR12 Zener diode is manufactured with a voltage regulating element ranging from 3.2V to 68V.

Features

• Low profile surface mount
• Pb free, RoHs compliant
• Maximum rating from 3.2V to 68V
• Current Leakage down to 0.2uA
• High power dissipation of 100mW

Applications

The 1N5949PE3/TR12 Zener diode can be used in many different applications. Some of the common uses include:

• Regulating the voltage output in switching power supplies.
• Voltage reference circuit.
• Clamping overvoltage spikes.
• Voltage controlled switching.

Working Principle

Zener diodes operate under the principle of reverse current breakdown in a semiconductor diode. This is when a semiconductor such as a diode is operated in the reverse direction, current will start to flow from anode to cathode and the voltage across the diode falls until it reaches the Zener breakdown voltage. At this point the current through the diode increases rapidly and the voltage across the diode rises to a constant level. This constant voltage level then remains irrespective of the applied voltage and current through the diode.

When the diode is operated in its forward bias, the voltage drop across the diode is small because the majority of current passes through the chip. However, when the diode is operated in its reverse bias, the majority of current is blocked by the chip and instead flows through the more resistive depletion layer, causing the voltage drop across the diode to increase until it reaches the Zener breakdown voltage. At this point the diodes current begins to increase and the voltage across the diode becomes constant.

Packaging Options

The 1N5949PE3/TR12 Zener diode is available in surface mounting packages, such as the SOT-23, SOD-123, SOT-563, SOT-883 and other similar packages. The range of packages available allows for the diode to be used in a wide variety of applications.

When selecting a Zener diode for your application, you should consider the various features and characteristics such as the operating temperature range, power dissipation and current leakage. Additionally, you should consider the various packaging options available to determine if that particular package will fit into your circuit.

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