SMAJ110AHE3/5A

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TVS - Diodes, or Transient Voltage Suppressors, are essential components in circuit designs to protect sensitive devices from sudden voltage spikes, commonly experienced in short duration surges. SMAJ110AHE3/5A is a popular TVS-Diode that is widely used in many applications today. This article will discuss the application field and working principles of the SMAJ110AHE3/5A.

Application Field

The SMAJ110AHE3/5A is a unidirectional TVS-Diode used for board level ESD protection. It is a low-cost, entry-level diode, which makes it popular in applications such as DSM-IV systems or consumer electronics. With a 1500W surge capability and breakdown voltage of 13V and 5A, it is ideal for protecting a wide range of devices such as SMPS, TV, AC, and etc. from transceivers, fax machines, and blades. In addition, it is also suitable for environments that experience high-transient suppression requirements, such as industrial and medical applications.

Working Principle

The SMAJ110AHE3/5A is a two-electrode diode. When the diode is in its OFF state, no current will flow through it, and when it turns on the anode connected to the device is positively charged while the cathode connected to the ground is negatively charged. The diode works by clamping the voltage applied to the device and dissipating the overshoot voltage into the ground. This helps to protect the device from the voltage spikes and to maintain the supply voltage at the required level.

When the voltage on the anode goes beyond the breakdown voltage of 13V, the diode will clamp and the current will flow from cathode to anode. The current will then travel through the negative terminal to the diode, while the positive terminal will be connected to the ground. As long as the voltage stays below the breakdown voltage, only a small amount of current will flow through the diode and the device will be relatively protected. It is important to note that the diode\'s clamping voltage is also dependent on the surge energy rating of the diode.

To ensure that the SMAJ110AHE3/5A is properly functioning, it is essential to ensure that the diode is connected correctly. The diode should always be connected with the anode connected to the device and the cathode connected to ground. It is also important to use a diode that is rated for the application, as using one with a higher rating than necessary may result in an increased power dissipation and could lead to damage to the device.

Conclusion

The SMAJ110AHE3/5A is a popular TVS-diode, ideal for board level ESD protection. With a 1500W surge capability and breakdown voltage of 13V and 5A, it is suitable for a wide range of applications. The diode works by clamping and dissipating the overshoot voltage into the ground, and is essential in protecting sensitive devices from voltage spikes. It is important to ensure that the diode is connected correctly, and always use a diode rated for the application.

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