SMA5J20CHE3/5A

Transient Voltage Suppressors (TVS) are diodes designed to protect sensitive electronic components from damage caused by electrical transients and surges, such as lightning or electrostatic discharge.

The SMA5J20CHE3/5A TVS diode is a unidirectional device designed to protect low voltage, highly sensitive electronic circuits from transients caused by electrical overstresses.

Application Field

This device is recommended for the protection of sensitive IC inputs as found in computer peripherals, power supplies, interface buses and communications equipment. Its low clamping voltage, low dynamic impedance, small size and low cost make it an ideal solution for protecting sensitive electronics from power surges.

In applications such as battery powered devices, the low clamping voltage and low dynamic impedance ensure that the TVS will not draw too much current from the power source.

The TVS diode\'s small size also means that it can be mounted in tight spaces, while its low cost makes it an attractive choice for budget-conscious consumers.

Working Principle

The SMA5J20CHE3/5A TVS diode is a special type of metal oxide varistor (MOV) with two distinct regions of conductivity. The anode is normally connected to the negative side of the power source, and the cathode is normally connected to the positive side. When the voltage between the two terminals exceeds the breakdown voltage of the TVS diode, the MOV begins to conduct. This provides a low impedance path to ground, which effectively dissipates any surge or transient current.

When the transient dissipates, the MOV returns to its high-resistance state, preventing any further current conduction. This ensures that the protected circuit is not damaged by surges or transients.

The TVS diode can be used in a variety of applications, including cell phone charging ports, USB ports, thermocouples, and line drivers. It is an ideal solution for providing protection for sensitive circuits from power surges.