P4KE9.1A R1G Circuit Protection

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TVS diodes are a type of solid state protection device, designed specifically to protect sensitive electronic components from damage due to overvoltage events such as transient electromagnetic interference, electrostatic discharge, or lightning strikes. They are often used in automotive and industrial applications, where high-power and/or high-frequency switching is required.

The P4KE9.1A R1G is a bidirectional uni-directional Thyristor Surge Protection Device (TSPD) designed to provide overvoltage protection for sensitive electronics and components. The device offers superior performance ideally suited for protection against transient voltage surges on AC and DC power inputs. Thanks to its uni-directional design, it offers 800W of peak power handling capacity.

The P4KE9.1A R1G features an operating voltage range of 5V to 200V, with a breakdown voltage rating of 400V and an operating junction temperature range of -40℃ to +125℃. The device is characterized by a very low reverse leakage current of less than 500uA, and a fast charge recovery time of less than 1.2ns. Moreover, the device features a high surge resistance up to 40A for 10×1000 μs, making it an excellent choice for transient voltage protection.

In terms of its application field, the P4KE9.1A R1G is commonly used in DC and AC power input protection, lightning protection, and ESD protection circuits. It is used to protect against high voltage transients caused by load switch-off transients or line disturbances. The device can also be used as a general-purpose protection device in consumer electronics, industrial and home automation products, telecommunication equipment, and automotive applications.

The working principle of the P4KE9.1A R1G is based on a high-density thyristor structure. The device works by providing a low internal resistance path to ground which allows a high current to flow, thus diverting the overvoltage away from sensitive electronic components. The device supports both DC and AC power inputs, and the overvoltage protection is triggered by an external 10V clamps signal.

In conclusion, the P4KE9.1A R1G is an excellent choice for high-power and/or high-frequency switching applications due to its superior performance, high surge resistance, and fast charge recovery time. The device is widely used in transient voltage protection circuits and for protecting against overvoltage events such as ESD, lightning strikes, and load switch-off transients. Thanks to its low reverse leakage current and wide operating temperature range, it is a reliable and cost-efficient protection solution for a wide array of applications.

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