1PMT5949BE3/TR7

Diodes - Zener - Single

The 1PMT5949BE3/TR7 is a simple single Zener diode, best suited for applications where a low voltage, low current diode is required. These diodes are often used in analog and RF signal applications, and have been developed to be both reliable and efficient.

Application Field

A single Zener diode, such as the 1PMT5949BE3/TR7, is usually used as a voltage reference, or to provide a constant voltage across a circuit. These diodes typically have a low voltage rating, and can be used in low power applications, as they require only a low current to operate. They are also frequently used as a clamping device, which can protect sensitive electronics from overvoltage damage, such as static electricity, spikes in the power line, or transient overvoltage.

Working Principle

Single Zener diodes operate on the principle of reverse breakdown, which is an electrical breakdown of the junction in the diode when a certain level of reverse voltage is applied. When the voltage applied exceeds the Zener voltage, current begins to flow through the diode due to the electric field generated. The breakdown voltage for the 1PMT5949BE3/TR7 is 5.9V.

When the diode is used as a voltage reference, the junction voltage is maintained in a circuit at the Zener breakdown voltage. This is done by having a current flowing through the diode when the applied voltage is greater than the Zener voltage. This current is then limited by a resistor placed in series with the diode, thus maintaining the voltage across the diode at the Zener breakdown voltage.

Similarly, when the diode is used as a clamping device, the same reverse breakdown principle applies. When the voltage applied to the circuit becomes too high, the diode will begin to conduct, allowing current to flow until the voltage is reduced below the Zener voltage. This protects sensitive electronic components from damage due to overvoltage.