MMBZ5256B-7-F

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MMBZ5256B-7-F Application Field and Working Principle

MMBZ5256B-7-F, classified as a diode from the Zener single family, is a medium power voltage regulator diode that works with a 3.2 V minimum breakdown voltage. This device is available in SOT23 surface mount packages, providing thousands of volts of surge protection for each of the pins in the package, mainly used in telecommunication applications. Its design enables it to be used in a larger number of applications, including radio and TV, cellular phones, computers, and other applicable fields.

Description

MMBZ5256B-7-F, with a maximum power dissipation rating of 500mW (T A =25°C), is an ultra-small surface mount package that includes numerous features. It is available in both DO-213AC (SMD) and SOT23-6L form factors and in a variety of breakdown voltages ranging from 2.5V to 8V. These voltage regulators can be used as a series of protective diodes in order to avoid voltage abnormalities, such as overvoltage, under-voltage or any other abrupt or erratic change in voltage in the circuit.

Applications

This voltage regulator diode’s surge protection capabilities and small form factor make it suitable for a variety of applications. It is a very common choice in radio and television applications where it provides steady voltages. It can be used to minimize voltage irregularities caused by environmental disturbances, like electrostatic discharge (ESD), in computer networks, Internet of Things (IoT) systems, consumer audio and video electronics and more. MMBZ5256B-7-F is also an ideal choice for applications where power consumption needs to be kept to a minimum.

Working principle

MMBZ5256B-7-F, as with any other Zener diode, works in two modes based on the value of the applied voltage: forward (when V applied > V zener ) or reverse bias (when V applied < V zener ). When forward bias is applied to the diode, the diode behaves as a traditional diode and the current flow is unaffected by the Zener breakdown voltage that is applied to the diode during reverse bias. When reverse bias is applied to the diode, if the voltage is greater than the Zener breakdown voltage, the diode will operating in its Zener mode, at which point the current will not exceed the breakover Joule heating due to the reverse breakdown.

When in Zener mode, the diode will dissipate power in order to keep the reverse breakdown voltage steady. As the power is dissipated, the voltage will eventually drop below the Zener breakdown voltage and the device will begin to operate in its recovery mode. In this mode, the device will act as a traditional diode and will allow the current to flow through to its circuit.

Conclusion

MMBZ5256B-7-F is an excellent choice for a wide range of applications where surge protection and low power consumption are needed. Its small form factor and easy installation processes make it a great choice for engineers who need to quickly and reliably build their projects. With its lower priced alternative, it can be a cost-effective alternative to other Zener diodes. This particular device serves to provide steady voltages to radio and TV, cellular phones, computers, and other applicable fields.

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