MAPLAD18KP40CAE3

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TVS (Transient Voltage Suppressor) diodes are highly engineered, modern semiconductor devices designed to protect electrical or electronic systems from voltage surges or spikes. The MAPLAD18KP40CAE3 is a specific TVS diode manufactured by STMicroelectronics, and is designed to protect against both ESD (electrostatic discharge) and EFT (electric fast transients).

Application Field

The MAPLAD18KP40CAE3 is designed for application in low-power, low-voltage bi-directional ESD protection of 12V signal lines. It is appropriate for industrial environments where ESD pulses may vary in amplitude (due to the random discharge strength of static electricity). Typical applications for the MAPLAD18KP40CAE3 include ESD protection for 12V DC signals such as bus lines and I/O lines in computers, servers, networking equipment, telecommunications, and automotive applications. This TVS diode is also suitable for consumer devices that require ESD protection.

Working Principle

In principle, TVS diodes can be thought of a form of voltage-controlled switch, as they ‘turn on’ or ‘clamp’ the voltage when it reaches a specified level. The MAPLAD18KP40CAE3, for instance, has a reverse stand-off voltage of 40V and a peak pulse power of 1800 Watts. In operation, an ESD event or transient will cause the MAPLAD18KP40CAE3 to reduce the voltage until it reaches the stand-off voltage, after which it will begin to conduct a small amount of current. This allows the voltage on the lines to remain below the specified level, protecting the device.

The MAPLAD18KP40CAE3 is also designed for use in both uni-directional and bi-directional applications and can handle both positive and negative ESD transients. This is something to keep in mind when choosing a TVS diode for an application. The diode should be able to handle any ESD event in either direction, regardless of the magnitude or duration. The MAPLAD18KP40CAE3 is engineered specifically for this type of situation, and can handle pulses up to 10A without failure for up to 8/20μs.

In addition to the protection offered by the MAPLAD18KP40CAE3, extra features make it a great choice for a wide range of applications. The device is designed to be RoHS compliant, meaning it will not emit any hazardous materials. It also has very low clamping voltage, as low as 5.9V, so it will not affect the operation of the system in which it is used. Finally, like all TVS diodes, the MAPLAD18KP40CAE3 is designed to conform to the IEC 61000-4-2 international standard for ESD protection.

Conclusion

The MAPLAD18KP40CAE3 is a versatile and reliable TVS diode with a wide range of applications. It is designed to provide bi-directional ESD protection for low-voltage and low-power 12V signal lines in various industrial, telecommunications, and automotive applications. The device is RoHS compliant and conforms to the IEC 61000-4-2 international standard for ESD protection. It also has very low clamping voltage, making it suitable for a variety of applications. With all these features, the MAPLAD18KP40CAE3 is a great choice for protecting electronic and electrical equipment from voltage surges or spikes.

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