SZMMSZ5251BT1G

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The SZMMSZ5251BT1G is a single Zener diode, which is commonly used in both analog and digital circuit applications. This diode is a silicon PN junction device with a zener breakdown voltage range of 3.3 V to 200V.

This diode has a power dissipation rating of 750 mW, a reverse current of 5.0 mA, and a maximum reverse voltage rating of 200 V. It has a voltage regulation of 3.0 V, which makes it suitable for voltage reference applications.

The SZMMSZ5251BT1G diode has many applications with its wide range of voltage options and its low voltage regulation. It is used in digital logic systems for voltage clamping, voltage regulation, EMI protection, and surge protection. Furthermore, this diode is widely used in analogue circuits for temperature compensation, current limiting and overvoltage protection.

In addition to the listed applications, the SZMMSZ5251BT1G is often used in switching power supplies, particularly to regulate the output voltage. This type of power supply provides a constant output voltage, so the SZMMSZ5251BT1G diode can be used to prevent any voltage surges or overvoltages. It is also used in battery chargers and DC-DC converters.

The working principle of the SZMMSZ5251BT1G is based on the PN-junction characteristics of the diode when operated under its reverse bias. In a reverse bias mode the diode’s voltage drop rises sharply when the reverse voltage reaches the diode’s breakdown voltage. This voltage drop is known as the ‘Zener effect’ and maintains the reverse current at a very low level. The voltage regulation of the diode is implemented by this Zener effect.

At temperatures higher than the temperature at which the diode was tested, it will present a higher breakdown voltage and larger reverse current can flow. Therefore, the output voltage of the diode will have to be adjusted accordingly. One way to compensate for this temperature drift is to increase the Zener voltage or diode current.

The SZMMSZ5251BT1G is a cost-effective, reliable solution for applications in both analog and digital circuit designs, that require an extended range of supply voltages. Its ability to regulate the output voltage, coupled with its wide voltage range and low voltage regulation, makes it a popular choice in many applications.

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