SMF45A-HE3-18

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TVS - Diodes

TVS (Transient Voltage Suppressor) diodes are special types of diodes used in circuit protection in order to protect sensitive components from electrical overstress (EOS). TVS diodes are created by connecting two diodes in series with an oxide layer between them. When the voltage across the diode increases above the breakdown voltage, the oxide layer between the two diodes breaks down forming a conductive path between the two diodes allowing higher voltages to conduct. TVS diodes are used for a variety of applications such as ESD (Electrostatic Discharge) protection, surge protection, and voltage snubbering.

SMF45A-HE3-18 application field and working principle

The SMF45A-HE3-18 is a TVS diode specifically designed to protect against electrical overstress (EOS). It is a unidirectional device and works by providing a high-speed avalanche breakdown when the voltage it is exposed to exceeds its breakdown voltage. The diode is often used in Li-Ion battery protection, automotive electronics, and industrial applications. When the SMF45A-HE3-18 diode is subjected to voltage that exceeds the breakdown voltage, the device provides a low capacitance path to ground, limiting the voltage and protecting against EOS.

The SMF45A-HE3-18\'s breakdown voltage is 18V and it has a peak pulse power rating of 600W. It also has a typical reverse current surge rating of 4A and offers good static and dynamic clamping characteristics. The device also has a low clamping voltage and high-efficiency reverse leakage current.

The SMF45A-HE3-18 has a variety of applications such as ESD protection, surge protection, voltage snubbering, and automotive electronics. The low clamping voltage of the diode allows it to provide protection against ESD pulses up to 25A, and it also offers good surge protection characteristics which make it a good choice for automotive applications. The device is also suitable for applications where minimal performance degradation or no permanent damage is required.

In conclusion, the SMF45A-HE3-18 is a TVS diode designed to protect against EOS. It has a wide range of applications such as ESD protection, surge protection, voltage snubbering, and automotive electronics. It has a breakdown voltage of 18V and offers good static and dynamic clamping characteristics. The device is also suitable for applications where minimal performance degradation or no permanent damage is required.

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