PGSMAJ22AHR3G Circuit Protection

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A Transient Voltage Suppression (TVS) diode is a semiconductor device used to limit voltage transients in a circuit. It is a type of diode designed specifically to protect against electrical overstress (EOS) caused by spikes and other transients. The PGSMAJ22AHR3G TVS diode is a dual-channel component, with two axial channels, and is designed to protect sensitive electronics from high voltage transients. It is ideal for applications such as automotive, factory automation, and medical/industrial systems.

Features

The PGSMAJ22AHR3G TVS diode has a bipolar construction for high clamping voltage, low leakage current, fast response time, and low operating power for extended battery life. It is made of a thermally conductive substrate for improved heat dissipation, reducing its effective resistance and extending its dynamic range. The bipolar construction also ensures the device can withstand short-term over-voltage transients. The device has a low stand-off voltage and higher surge power capability for better protection.

Applications

The PGSMAJ22AHR3G TVS diode is an ideal choice for protecting automotive systems including ABS (anti-lock braking systems) and airbag inflate systems. It is also suitable for protecting power supplies, telecommunications, and factory automation systems from voltage transients. The device can be used in medical/industrial systems such as patient monitoring systems and vital signs monitoring devices.

Working Principle

When a high voltage transient occurs, the base-to-emitter junction of the diode is forward biased. This forward bias causes the diode to start conducting current, and the voltage across the diode is quickly clamped to the breakdown voltage (VBR) of the diode. This clamps the transient voltage and diverts the current away from the circuit. Once the transient has passed, the forward bias is removed, and the diode returns to its non-conduction state.

Conclusion

The PGSMAJ22AHR3G TVS diode is an ideal choice for protecting automotive systems and industrial/medical systems from over-voltage transients. It provides fast response time and high surge power capability for added protection. The device is made of a thermally conductive substrate for improved heat dissipation and low operating power for extended battery life. Its dual-channel construction ensures the device can withstand short-term over-voltage transients.

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