SMBG6.5CAHE3/5B

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TVS diodes are an important part of power-supply architectures in computing, communication, industrial, and home electronic systems. Specifically, TVS diodes are typically used in conjunction with polymeric positive temperature coefficient (PPTC) resettable fuses to protect against both over-voltage and over-current conditions. The SMBG6.5CAHE3/5B is a key example of a TVS diode that is commonly found in various electronic applications. This article will provide a detailed description of the application field and working principle of the SMBG6.5CAHE3/5B.

The SMBG6.5CAHE3/5B device is a silver-sinter, high current overvoltage protection diode. It is designed to provide reliable protection against overvoltage transients, providing the following features:

• Low capacitance for fast signal speed;
• Low dynamic resistance for minimum noise impact on signal;
• Protects up to 6.5A continuous current;
• Stable and repeatable clamping voltage performance.

In terms of application fields, the SMBG6.5CAHE3/5B diode finds usage in many modern and legacy electronics systems, such as computer systems, telecommunications and industrial automation devices, as well as static RAM, microprocessors, and so on. It is applicable to a wide voltage operating range from 7V to 32V and various operating temperature ranges from -65°C to 150°C, and can withstand ESD pulses up to 6kV as well as short duration over voltage transients up to 8kV.

The SMBG6.5CAHE3/5B is a form of Transient Voltage Suppressor (TVS) diode, which is specially designed to offer overvoltage protection from large voltage spikes while still offering low-capacitance protection. It works on the same principle as many other TVS diodes by utilizing a Zener diode\'s capacity to maintain a specific voltage across its terminals when reverse biased. When the voltage exceeds the breakdown voltage of the Zener diode, the TVS diode will quickly activate and clamp the voltage, thereby preventing damage to the connected circuit. In the case of the SMBG6.5CAHE3/5B, this breakdown voltage is typically between 8V and 10V.

The SMBG6.5CAHE3/5B can be used in two common configurations, either symmetrical or asymmetrical. The symmetrical configuration offers symmetric ESD protection on both sides of the part. Alternatively, the asymmetrical configuration utilizes the diode\'s low capacitance to provide faster response time and greater protection than traditional ESD protection devices. In both cases, the diode will connect at two points within the circuit, and serves as a protective barrier against damaging overvoltage events.

The SMBG6.5CAHE3/5B is typically employed in devices or circuits with high surge or ESD sensitivity. When designed into a system, it is important to ensure that the voltage applied to the part does not exceed the maximum ratings. This is done by adding series or parallel resistors to limit the current or provide an additional voltage drop. The figure below provides a graphical representation of typical SMBG6.5CAHE3/5B applications.

In summary, the SMBG6.5CAHE3/5B is a high current over-voltage protection diode designed for use in various electronic applications. It provides reliable over-voltage protection by utilizing a Zener diode to return a precise breakdown voltage. Additionally, the diode can be used in either symmetrical or asymmetrical configurations, depending on the application requirements. As such, the SMBG6.5CAHE3/5B is an effective solution for a variety of modern and legacy electronics systems.

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