SMDA05C-5/TR7

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TVS diodes are devices used to protect electrical components and systems from transient voltage surges. The SMDA05C-5/TR7 is a popular 5VDC bidirectional TVS diode widely used in many applications. This article explores the applications and working principles of the SMDA05C-5/TR7.

Applications

As a 5V bidirectional TVS diode, the SMDA05C-5/TR7 offers electrostatic discharge (ESD) and electrical fast transient (EFT) protection, helping to defend against harmful electrical surges. The device is widely used in automotive, consumer and industrial applications, such as cars, computers, industrial control systems, medical devices, and more. The SMDA05C-5/TR7 also offers over-voltage protection for a broad range of electronic components, including voltage-sensitive semiconductor devices, resistors, capacitors, and other circuit components.

Automotive applications benefit particularly from the SMDA05C-5/TR7, as it can block up to 5A of electrostatic discharge and 15A of electrical fast transient for extremely short pulses. In the event of an electrical surge, the diode quickly short circuits, preventing damage to sensitive electronic components. The low leakage current rating of 0.1uA makes this diode especially suitable for applications that require low power consumption, such as automotive powertrain control modules. Additionally, it has a relatively low capacitance of 4.5pF, which allows it to protect signals of a wide range of frequencies.

Working Principle

The SMDA05C-5/TR7 is a bidirectional TVS diode, meaning it can protect against both positive and negative surges. This device uses bidirectional structures that direct the surge current along two paths. This provides a more effective protection that cannot be achieved with single unidirectional diodes. The device consists of two series-connected semiconductor elements, each with its own anode and cathode. When a transient voltage is applied, the anode-cathode junction of one element quickly breaks down, allowing a current to flow through the PN junction and dissipate the surge energy. At the same time, the other element is designed to make sure the peak current stays below the device’s designed current ratings.

In addition to the surge protection offered by the SMDA05C-5/TR7, the device also features a working voltage of 5V and a clamping voltage of 6.4V. The low working voltage ensures that the device is not overloaded, while the high clamping voltage helps to protect sensitive electronic components from over-voltage. The device also has a low reverse leakage current rating of 0.1uA, making it suitable for applications that require low power consumption. Finally, the device also offers temperature compensation, ensuring that it will provide reliable and consistent protection even at extreme temperatures.

Conclusion

The SMDA05C-5/TR7 is a 5VDC bidirectional TVS Diode used for protecting sensitive electrical and electronic components from transient voltage surges. Its bidirectional structure, low leakage current rating, low working voltage, high clamping voltage, and temperature compensation make this device ideal for applications that require protection from electrical surges. The SMDA05C-5/TR7 can be used in automotive, consumer, and industrial applications, including cars, computers, and industrial control systems.

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