1SMC48AT3G

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TVS - diodes are electronic components which provide an economical protection against transient overvoltage events. They are widely used in circuit protection applications. This article will discuss the application field and working principle of 1SMC48AT3G, a type of TVS (Transient Voltage Suppression) diode.

1SMC48AT3G is suitable for a variety of applications that need protection against transient overvoltage conditions. It has a low stand-off voltage of 3.3V, which means it is well-suited for the protection of sensitive devices such as general-purpose I/O lines or CPU cores which should not be exposed to the high voltage surge. The enhanced diode configuration allows the 1SMC48AT3G to achieve a high peak pulse current, making it suitable for the protection of devices connected to power grids or long lines with high surge current. It also features a low capacitance, which makes it suitable for radio frequency applications.

1SMC48AT3G is an uni-directional transient voltage suppression (TVS) diode. It is made up of two parts: an integrated junction diode and a series electrode diode. The junction diode is a device which has electrodes that are connected through an intrinsic region called the depletion region. It can be used to protect circuits from both ESD (electrostatic discharge) and EFT (electrical fast transients) events. The series electrode diode is connected in series to the junction diode and provides the clamp voltage. This allows the TVS diode to limit voltages to a designated safe level.

1SMC48AT3G works in conjunction with an avalanche breakdown mechanism. When excess current passes through the device, it causes an electric field which exceeds the breakdown voltage of the device. The electric field causes an avalanche breakdown in the depletion (intrinsic) region of the diode. This avalanche breakdown will cause a voltage drop across the diode, clamping the voltage. This will limit the peak voltage to a safe level.

In summary, 1SMC48AT3G is a TVS (Transient Voltage Suppression) diode able to provide excellent protection against transient overvoltage events. It is suitable for a variety of applications, especially those involving high surge current and radio frequency protection. It works on the principle of avalanche breakdown, achieving voltage clamping by limiting the peak voltage to a safe level.

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