BZD27B91P-E3-18

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The BZD27B91P-E3-18 is a high power single Zener diode that combines high cost-effectiveness and stability for a wide array of applications. Produced by Vishay, this diode is a part of Vishay\'s extended portfolio of Zener diodes. It is a Zener Diode with a maximum current rating of 6.6mA, operable range of 1.8V and a rated voltage of 18V. The total power dissipation is 33mW, and the diode has a nominal thermals on resistance of 250°C/W.

The BZD27B91P-E3-18 covers a wide range of application fields. It can be used in circuit protection as Zener clamps, voltage regulators, surge protection and voltage clamping circuits. It finds regular use in DC power supplies, local batteries, microwave circuits and pulse circuits.

This diode works in accordance to the Zener effect. Zener effect allows a diode to operate in the opposite direction of its normal operation. When the junction of an N-type semiconductor and a P-type semiconductor is exposed to a voltage, electrons from the N-type semiconductor diffuse into the P-type. This results in a depletion layer, which is a region of high resistance. In the reverse direction, the electric field at the junction boosts the minority carrier concentrations and restricts the current flow. This allows for a steady reverse current.

In the case of BZD27B91P-E3-18, the reverse voltage should be kept between the rated value and the maximum rating beyond which the device might get damaged. This reverse voltage creates the Zener voltage, which enables its use as a voltage regulator. The voltage has to be during normal operations, otherwise the Zener voltage will be higher.

To summarise, the BZD27B91P-E3-18 is a high power single Zener diode that combines cost-effectiveness and stability. It is used in circuit protection as Zener clamps, voltage regulators and surge protection circuits, and can find application in DC power supplies, local batteries, microwave circuits and pulse circuits. The diode operates in accordance to the Zener effect, which allows for a steady reverse current. The reverse voltage should be kept within the specified limits, otherwise the Zener voltage will be higher.

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