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Diodes - Zener - Single

A Zener diode is a type of diode that, unlike a normal one, allows current to flow not only from its anode to its cathode, but also in the reverse direction, when the voltage is larger than the breakdown voltage known as ‘Zener knee voltage’ or simply ‘Zener voltage’. In other words, it behaves like a normal diode when operating in the forward mode, but also like a variable resistor connected in reverse when the voltage exceeds the breakdown voltage. The SZMMSZ15T1G is a 15V Zener diode that highlights a wide variety of uses.

SZMMSZ15T1G Application Field

The SZMMSZ15T1G is designed for use in applications that require up to 15V in order to provide a constant voltage source, as well as in low voltage voltage-clamped solutions. As such, it can be used in a wide range of products including televisions, radio receivers, power supplies, computers and even automotive uses such as voltage regulation.

SZMMSZ15T1G Working Principle

The main principles behind the SZMMSZ15T1G Zener diode are similar to those of a normal diode. It is made of a junction between n-type and p-type semiconductor materials, which creates a depletion zone and allows electric current to flow in one direction. The reverse breakdown voltage, or the ‘Zener voltage’, is the voltage at which the current starts to flow in the opposite direction. In order to obtain precise control over the Zener voltage for the SZMMSZ15T1G, a manufacturing process known as Zener diode trimming is used. It consists of using a laser to trim the junction and thus adjust the current/voltage characteristic of the diode, ensuring that the desired voltage is precisely reached.

Conclusion

The SZMMSZ15T1G Zener diode is a 15V diode developed by Rohm Semiconductor that can be used in a wide range of electronics. It is based on the same principles as normal diodes but offers a degree of control over its breakdown voltage, which makes it perfect for situations when precise voltage sources are required. Trimming techniques are used to precisely adjust the voltage so that the desired voltage is always reached, allowing it to be used in a variety of applications.

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