MQ1N8167 Circuit Protection

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TVS (Transient Voltage Suppressor) diodes, also known as transient voltage suppressor (TVS) diodes, are an important part of transient voltage surge suppressor (TVSS) products. They provide transient protection for applications including automotive and industrial electronics, and are typically found in car audio systems, outdoor lighting, even DVD players. The MQ1N8167 diode is a small form-factor TVS developed for automotive applications.

In terms of electrical performance, the MQ1N8167 features a wide operating voltage range of 5V to 18V, a fast response time of less than 50ns, and a low capacitance of less than 1pF. The diode is designed to protect against ESD and surge events with breakover voltage range from 15V to 32V. It also features low leakage current and a high surge current capability of 45A. The diode is RoHS compliant, halogen free, and has an UL flammability rating of 94-V2.

The application field of the MQ1N8167 is primarily automotive electronics, but it is also widely used in industry for protection against overvoltage, power surge, and ESD events. It can also be used in any application where protection from transient surge events is needed. It is ideal for automotive applications that require fast response, low capacitance, and low breakdown voltage.

The working principle of the MQ1N8167 TVS diode is based on the voltage-controlled breakdown of the diode. When a signal voltage exceeds the breakdown voltage, the diode\'s voltage-controlled resistance abruptly drops to a very low level. This allows the voltage flow from the signal source to the ground, which is what provides protection from overvoltage by limiting the amount of current available to the device.

The MQ1N8167 is typically used in a configuration called a crowbar. This is where two TVS diodes are connected in series to provide fast response in the event of an overvoltage. When the signal voltage exceeds the breakover voltage of the diode, the diode conducts and the current flows through the diode, causing a voltage drop and limiting the voltage across the device.

In addition to its use in crowbar configurations, the MQ1N8167 can also be used to provide ESD protection. The diode is designed to have a very fast response time, which is critical for efficient ESD protection. ESD protection is typically accomplished by adding another diode, called a Zener diode, in parallel with the TVS diode. When an ESD voltage is applied to the system, the Zener diode breaks down faster than the TVS diode allowing the current to be discharged to ground.

The MQ1N8167 TVS diode is an ideal solution for automotive and industrial applications that require protection from transient surge events. Its wide operating voltage range, fast response time, and high surge current capability make it a highly versatile component for protection against ESD, power surge, and overvoltage events.

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