SMP22A-E3/85A

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Thyristor surge protection devices, more commonly known as transient voltage suppressors (TVSs), are designed to protect electronic circuit components from transients and voltage spikes. The SMP22A-E3/85A is a TVS that provides reliable protection from electrical interference. It forms an integral part of power system designs and provides superior protection from overvoltage transients in a variety of applications. This article will discuss the application field and working principle of the SMP22A-E3/85A.

The SMP22A-E3/85A is a low capacitance, bi-directional TVS that provides bidirectional overvoltage protection over a wide operating range. It is designed for automotive applications such as instrumentation, communications, industrial, and automotive power supplies. It can also be used in circuit protection applications, such as power supplies, solar technology, data line protection, communication lines, and medical equipment. The device is designed to protect against transient voltages by clamping the applied voltage to a specified maximum.

The SMP22A-E3/85A includes an integrated Zener diode and two MOS transistors. The device is designed to clamp the input voltage to a predetermined level by providing a low-impedance path to ground once the voltage exceeds the rated value. The device operates by creating a short circuit, thus allowing a rapid transfer of energy from the external voltage source to a low-impedance path to ground. When used in an industrial setting, the SMP22A-E3/85A can provide superior protection for a variety of applications including motor drives, controllers, and power supplies.

The device is RoHS compliant and offers an integrated thermal shutdown function for thermal overload protection. This ensures the protection of the circuit from prolonged overvoltage conditions. The device also has an integrated ESD protection diode which minimizes pre-breakdown events. In addition, the device has integrated high-level electrostatic discharge immunity that can withstand up to 8.0kV.

The SMP22A-E3/85A device also has an integrated current limiting circuit which helps to protect the components at the input stage from overcurrent conditions. This is designed to reduce the power dissipation of the device and prolong its life. The device is also designed with an enhanced surge protection capability which helps to clamp the maximum operating voltage at 2.5V. This helps to reduce overvoltage transients that could potentially damage the circuit.

In conclusion, the SMP22A-E3/85A device is a transient voltage suppressor (TVS) that provides reliable overvoltage protection for electrical interference. It has an integrated Zener diode, two MOS transistors, and an integrated current limiting circuit for overload protection. The device also features enhanced surge protection capability and an integrated thermal shutdown function to protect the circuit from prolonged overvoltage conditions. The device is RoHS compliant and is suitable for use in a variety of applications such as motor drives, controllers, and power supplies. It is designed to clamp the maximum operating voltage to 2.5V in order to reduce overvoltage transients.

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