SA26AHA0G Circuit Protection

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Transient Voltage Suppressor diodes (TVS) are important elements in power and data line protection. In applications where electrical fields are subject to transient events, such as ESD or spiked voltages, they act as a "clamping" device which diverts the fault current to ground/energy reset. Among the various variants available, the SA26AHA0G stands out due to its ultra-wide capacitance range (0.44-4700pF), high peak pulse current (Ipp=200A), and the lowest operating voltage in its class (Vbr=27.34V). This TVS diode is ideal for protecting high-speed communications lines and other sensitive electronic devices.

A breakdown occurs when the voltage across a diode exceeds the value of its breakdown voltage (Vbr). SA26AHA0G has a Vbr value of 27.34V, which means that when the voltage across the device\'s p-n junction exceeds this value, an avalanche breakdown is triggered, allowing current to flow. This current is then spread over the device\'s surface rather than localizing at a single point, thus preventing damage to the underlying structure.

When the breakdown has occurred, a large amount of current flows through the diode. The current limit of the SA26AHA0G is determined by its Ipp (peak pulse current) rating of 200A. It is important to note that the voltage, once breakdown has occurred, will remain stable even as the current increases. This is because the on-state voltage drop (Vf) of the diode is quite low, and any increased current will merely further reduce this voltage drop.

The SA26AHA0G is suitable for a wide range of applications due to its ultra-wide capacitance range (0.44-4700pF). This range of capacitance allows for a wide range of use cases, such as ESD suppression, EMI filtering, spike suppression, and over-voltage protection. It is also suitable for high-speed data line protection, as its low Vf ensures good signal integrity. The device also features an excellent thermal response, with a thermal resistance of 4°C/W.

To sum up, the SA26AHA0G is an excellent choice for a wide range of protection applications. Its ultra-wide capacitance range, high peak pulse current rating, and low Vbr make it ideal for ESD suppression, EMI filtering, and high-speed data line protection. Its low thermal resistance also helps to ensure that it will be able to handle any transient event without overheating.

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