SZESD5Z12T1G Circuit Protection

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TVS-Diodes: SZESD5Z12T1G Application Field and Working Principle

Transient Voltage Suppressor (TVS) diodes are typically used to protect electronic circuits from destructive voltage transients. Like other types of diodes, they act as a barrier between two circuit nodes, allowing current to flow in one direction. However, compared to normal diodes, they are more robust against high-voltage and high-current surges.

The SZESD5Z12T1G is a device of this type, manufactured by the Japanese company LS. It can protect circuits from up to 12kV (12,000 volts) of transient voltage. The device is a multi-way component, with 5 terminals, each of which is connected to the PN junction that makes up the internal diode. The PN junction is designed to rapidly turn on and off, providing a high-speed protection to the circuit. The device also includes a built-in resistor and diode parasitic capacitance.

The SZESD5Z12T1G is designed for applications such as power supplies, PC boards, LCD and Plasma displays, solid-state and standby power supplies, and numerous other commercial and industrial applications.

The working principle of the SZESD5Z12T1G is relatively straightforward. When a voltage surge of greater than 12kV occurs, the device’s PN junction rapidly turns on, creating a low voltage drop across the terminals and allowing current to pass through the device. This reduces the voltage on the downstream side of the device, preventing damage to the protected circuit.

In addition, the built-in resistor and diode parasitic capacitance limit inductive transient energy and reduce the amplitude of the voltage pulses that pass through the device. This ensures that the device will effectively protect delicate electronic components from destructive voltage transients, while allowing normal signals and low-level streams to continue their course unaffected.

The SZESD5Z12T1G is an effective and reliable TVS diode that can protect a variety of circuits from high-voltage transient events. It features a built-in resistor and diode parasitic capacitance to reduce the amplitude of transient pulses and limit inductive transient energy, ensuring that the device will quickly and reliably protect the connected circuit from high-voltage surges.

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