SMPC75AN-M3/I Circuit Protection

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A TVS diode or Transient Voltage Suppression diode is an electronic component used to protect sensitive circuits from voltage spikes or even power surges. The SMPC75AN-M3/I is a type of TVS diode and its application fields and working principles are explained below.

Applications

The primary application of the SMPC75AN-M3/I is to protect against ESD (electrostatic discharge) events, which can be caused by components being damaged due to static electricity buildup. It is also suitable for protecting DC input lines, such as from USB cables, against surges. In this capacity, it is especially suitable for automotive applications.

Working Principle

The SMPC75AN-M3/I utilizes a special construction that enables it to clamp a voltage at a specified level. This occurs when the voltage reaches the clamping voltage of the diode, which causes the diode to conduct a low resistance current that diverts the voltage away from the sensitive parts of the circuit. This will protect the sensitive components and will keep the voltage within a specified range.

Once the voltage has risen above the clamping voltage, the SMPC75AN-M3/I will become reverse-biased. This will cause the current flow to stop and the voltage to return to its original level. During this time, the SMPC75AN-M3/I will act as a voltage regulator, since it will be diverting the current away from the sensitive parts of the circuit and keep the voltage within the specified range.

The SMPC75AN-M3/I is equipped with a reverse stand-off voltage that is set at 7.5 VDC. This means that when the voltage exceeds the reverse stand-off voltage it will be shut down. This is to protect the sensitive components from an overvoltage situation. Additionally, the SMPC75AN-M3/I is designed with transient protection that will protect against multiple spikes, such as from lightning.

The SMPC75AN-M3/I is designed to work in temperatures ranging from -55 to +125°C, making it suitable for automotive applications that may occur in diverse temperatures. Furthermore, it is UL recognized with 7000 A peak pulse current and 700 W peak pulse power ratings so that it can handle maximum surge conditions.

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