SMCJ13C

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The SMCJ13C is a silicon avalanche breakdown diode from Littelfuse® that is designed to protect a nearby circuit from high-voltage transients. It is a low-capacitance uni-directional device that is used to protect signal lines from destructive electrostatic discharges (ESD). The breakdown voltage is typically 13V, and the surge current rating is 200A. It also features a low leakage current of less than 100nA at 25°C.

The SMCJ13C is part of the TVS-Diode family of protection components. These components are designed to clamp voltage spikes in the signal lines to a safe level before they reach the protected component or circuit. The clamping voltage is often referred to as the “clamping voltage”, and this is typically several volts less than the breakdown voltage. The clamping voltage for the SMCJ13C is typically 9V.

The SMCJ13C is a low profile component, making it ideal for applications with limited space. It is also highly resistant to transient thermal stress and humidity, making it a reliable choice for applications in harsh environments. As a result, the SMCJ13C is frequently used in a variety of commercial and industrial applications, including servers, routers, computers, and other electronic devices.

The SMCJ13C works by allowing current to flow when the voltage on the signal line meets or exceeds the breakdown voltage. This causes a breakdown of the PN junction and creates an avalanche of electrons, which effectively clamps the voltage on the signal line to the clamping voltage. The clamping voltage is much lower than the breakdown voltage, which prevents high-voltage transients from damaging the protected component.

Once the transient has passed, the diode automatically resets and the current flow is interrupted. This allows the protected component to recover from the transient without being subjected to any permanent damage. The SMCJ13C also helps to improve ESD immunity by offering a low clamping voltage and increased surge current protection.

In summary, the SMCJ13C is a reliable and low-profile uni-directional breakdown diode that is designed to protect signal lines from dangerous electrostatic discharge transients. It has a low leakage current and excellent high temperature and humidity tolerance, making it an attractive choice for a variety of commercial and industrial applications. The SMCJ13C works by allowing current to flow when the voltage on the signal line exceeds the breakdown voltage, and this current flow effectively clamps the voltage on the signal line to the clamping voltage and prevents high-voltage transients from damaging the protected component.

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