SA75A A0G Circuit Protection

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TVS (Transient Voltage Suppressor) diodes are passive electronic components specifically designed to protect sensitive circuits from overvoltage transients, such as those generated by lightning strikes, electrostatic discharge, and cross-talk that can cause destructive voltage spikes. In order for a TVS diode to perform its function and safeguard electronic circuits, it needs to be characterized by a number of high parameters such as: fast response time, low clamping voltage, high surge capability, and low dynamic resistance.

The SA75A A0G is a small signal TVS diode with bidirectional overvoltage protection capabilities. This device from Diodes Incorporated is the ideal choice for protecting sensitive equipment from potential damage due to overvoltage transients. It is a surface-mount package built with low on-state resistance, allowing for very low operating load voltages in addition to fast response time, up to >10KV/µs.

In order to explain the application fields and working principles of the SA75A A0G, let us first consider the internal structure of a TVS diode. Inside the package there are two diodes connected in opposite directions: one is the avalanche diode, the second is the Zener diode. The Zener diode is connected in reverse connection and is controlled by a certain breakdown voltage, protecting the device from passing exactly the voltage below which it is connected. The value of this breakdown voltage is chosen according to the load power limitation. On the other hand the avalanche diode is connected in forward bias, controlling the peak voltage (clamping voltage) in which the device should operate in order to protect the load from too high voltages.

The SA75A A0G TVS diode from Diodes Incorporated is ideal for protecting load circuits from transient overvoltage and Electrostatic Discharge (ESD) in cellular telecommunication systems and audio/video applications, as well as a replacement for Fusible Resistors, MOVs, or inductors. Moreover, its low reverse leakage capability makes it also suitable for protecting nodes subject to high Electrostatic Discharge (ESD) or false wake-up events which could damage external gate drive circuits.

Its low dynamic resistance and its fast response time make it a perfect choice for applications where low voltage power supplies are required. Also its small form factor allows for greater design flexibility and requires minimal PCB space which makes it ideal for space-constrained applications.

The SA75A A0G can protect both power and signal lines in Automotive, Industrial, Military, Medical and Telecommunications applications. Given its wide range of application fields and capabilities, this device can protect bi-directional voltage bays up to 5V peak and up to 10KV/µs at 50Ohms due to its high capacitance.

In conclusion, the SA75A A0G TVS diode from Diodes Incorporated is an extremely versatile and reliable protection device that provides advanced protection for a broad range of applications. Its low on-state resistance, fast response time and low clamping voltage make it ideal for applications such as cellular telecommunication systems, audio/video applications, and Automotive, Industrial, Military, Medical and Telecommunications applications.

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