SMDA12C-4-2TR

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TVS (Transient Voltage Suppressor) diodes are used to protect electronic equipment from voltage transients induced by electrostatic discharge (ESD), lightning, and other power disturbances. The SMDA12C-4-2TR is a 12V TVS diode designed to suppress transients up to 1000W (10⁻¹² s) while providing overvoltage protection for sensitive electronic components.

The SMDA12C-4-2TR has a peak pulse power rating of 1000W with an associated clamping voltage of 17.6V (@ 10⁻¹² s). It is capable of suppressing transients up to 1000W meaning it can protect not only unidirectional but also bidirectional surge currents with a lower clamping voltage. The SMDA12C-4-2TR is available in an SOD-882 package with a lead spacing of 2.54mm.

The SMDA12C-4-2TR is ideal for use in automotive applications where overvoltage protection is needed for circuits exposed to power surges and high voltage transients. Additionally, it can be used in other applications such as battery protection, hybrid electric vehicles, and solar cells.

The working principle of the SMDA12C-4-2TR is very simple yet effective. During normal operation, the TVS diode is in a low-impedance open circuit state, allowing current to flow freely. However, when an overvoltage transient occurs, the diode is subjected to a large current which causes the diode to enter its breakdown region where the capacitance of the junction turns the diode into a low-impedance closed circuit, suppressing the transient to a safe level.

When the transient voltage reaches a certain level, the diode starts to conduct and the current flowing through it is limited to its rated reverse current, which allows it to effectively absorb the surge. The reverse current flows in the opposite direction to the normal current, which allows the charge that was stored in the device to dissipate through the diode, effectively reducing the voltage and preventing the device from being damaged.

The SMDA12C-4-2TR’s maximum reverse leakage current is 2mA at the rated voltage and its operating temperature range is -55°C to +125°C. Its reverse stand-off voltage is 12V and its peak pulse power rating is 1000W (10⁻¹² s).

In conclusion, the SMDA12C-4-2TR is a 12V TVS diode designed to protect against overvoltage transients. It is ideal for use in automotive applications where it provides overvoltage protection for circuits exposed to power surges and high voltage transients. Additionally, its simple yet effective working principle makes it suitable for many other applications such as battery protection, hybrid electric vehicles, and solar cells.

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