1SMA20CAT3G

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Transient Voltage Suppressors (TVS) diode, also known as a transient voltage clamp, is used to protect sensitive electrical and electronic components and devices from voltage transients caused by phenomena such as inductive switching, lightning, equipment connection and disconnection, and electrostatic discharge (ESD). The 1SMA20CAT3G is a type of TVS diode designed to protect components and devices from transient overvoltages that can reach up to 20 volts.

This diode is constructed with two terminals and composed of a series of metal oxide varistors (MOVs) connected in parallel. Its MOVs possess an intrinsic voltage dependent nonlinear impedance that limits current flow if the applied voltage exceeds the rated clamping voltage. In addition, the 1SMA20CAT3G has a glass-passivated junction that expands its protection range, thereby providing enhanced ESD protection and improved reliability.

1SMA20CAT3G are designed with dual ceramic encapsulation, which makes them highly resistant to shock, vibration, and temperature and humidity variations. As such, they are particularly suitable for applications in harsh environments, like autonomous motor vehicles, medical equipment and consumer electronics. The diode also offers low leakage current and fast response time, making them ideal for a wide range of applications including computers, routers, set-top boxes, and automotive engine control units.

The working principle of the 1SMA20CAT3G is simple. When a voltage transient occurs, the device limits the overvoltage and turns on, reducing the current to safe levels to protect the connected components or systems from damage. It does this by clamping the voltage to a safe threshold level to protect the connected components. Upon removal of the transient voltage, the device rapidly responds and returns back to the original state.

The 1SMA20CAT3G meets the highest level of IEC61000 4-2 ESD standard requirements and offers high surge capability for up to 1 second. Moreover, it has noise immunity in the range 100kHz–1GHz, making it the perfect solution for power line noise protection requirements. In addition, the diode is RoHS compliant, meaning it is free of hazardous substances, making it an ideal choice for environmentally sensitive applications.

In conclusion, the 1SMA20CAT3G Transient Voltage Suppressor (TVS) diode is a cost-effective solution for protecting sensitive electrical and electronic components and devices from voltage transients. It has fast response time, low leakage current, dual ceramic encapsulation, and meets ESD and RoHS standards. Applications range from medical equipment and autonomous motor vehicles to routers, set-top boxes and automotive engine control units.

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