SA90AHR0G Circuit Protection

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TVS - Diodes, also known as voltage-dependent suppressors or transient suppressors, are 2 terminal voltage-sensitive bi-directional devices used for protection against electrical transients generated due to ESD, EFT, Lightning, etc. The SA90AHR0G is one of the TVS - Diode series in production and is designed especially for high-speed and high-current transient overvoltage applications.

The SA90AHR0G series of TVS - Diodes provide high ESD protection for data lines, such as HDMI, and other high-speed interfaces. The device has an integrated protection circuit with four protection channels and is capable of handling high-frequency transients. This device series provides transient surge compliance up to IEC61000-4-5 level 4 for multi-strike protection.

The SA90AHR0G device’s operating voltage range is 4.7V-10V and it provides a ± 15kV ESD HBM performance with low clamping voltage (Vc=13.2V@IP=2A). The device also provides a fast response time of 1.6ns, low leakage current, and excellent surge and EFT robustness. The device is designed with an avalanche breakdown process to ensure ultra-low dynamic resistance (Rdyn = 0.4 to 0.5 Ohms). The operating temperature range of the device is -40°C to 125°C.

The SA90AHR0G is widely used in various applications due to its compact size, wide temperatures range, and surge robustness. The device is ideal for protecting circuits with high-frequency transients, such as networking and telecom systems. It is also suitable for mobile device protection due to its ultra-low dynamic resistance and fast clamping response. Other applications include automotive systems, computers, industrial control systems, power supply systems, and consumer electronics.

The SA90AHR0G device is based on the principle of avalanche breakdown. When the device is subject to transient overvoltages, the built-in protection circuit begins working to protect the device and its associated circuitry. At an applied voltage exceeding the breakdown voltage, a very large electric current will flow through the device, resulting in a fast response time and high peak surge current clamping. This process ensures the protection of the device’s connected circuits against transient overvoltages.

The use of the SA90AHR0G series of TVS - Diodes ensures reliable and robust protection against transient overvoltages from ESD, EFT, lightning, and other sources. The device’s small size, low price, and wide operating temperature range make it suitable for use in many applications. The device’s integrated protection technology, low dynamic resistance, and fast response time guarantee the device’s high surge robustness and EMC performance.

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