P4KE400CA-G Circuit Protection

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TVS-diodes are specialized diodes that are designed mainly for the purpose of protecting electronic circuits from electrical surges. In particular, the P4KE400CA-G TVS-diode is designed to protect circuits from overvoltage conditions caused by transient voltage surges, and is suitable for various applications in the industries of automotive, CCTV, and telecommunication. This diode is specifically designed to divert and dissipate damage-causing voltage surge.

The P4KE400CA-G is a unidirectional diode with a working voltage of 400V. According to the datasheet, it has the typical capacitance of 15pF at 1MHz, a maximum power dissipation of 450mW, and the typical junction temperature range of -55 to 125°C. It is available in the package of an SMAJ with do-214AA footprint. Additionally, this diode has a low clamping voltage with an impressive surge rating of 20A (8/20μs).

As a member of the TVS-diode family, the P4KE400CA-G offers excellent protection for sensitive electronic equipment from damage due to transient voltage surges, also known as transient voltage suppression (TVS). Voltage is reduced below a certain level—called the clamping voltage, which is reached when the diode becomes active—in order to protect sensitive electronic circuits. The P4KE400CA-G has a low clamping voltage of 28V, and its surge rating enables it to withstand voltage peaks of up to 20A (8/20μs).

The working principle of the P4KE400CA-G is based on the concept of capacitive behavior during overvoltage. When an overvoltage condition is applied, such as a lightning strike or an ESD event, the P4KE400CA-G will start to conduct in the reverse direction. This will cause the TVS-diode to charge up to the immediate clamping voltage level, which is dependent on the applied voltage magnitude and waveform, and then dissipate the excess energy through the internal dissipation element (known as a surge element). The surge element will work to divert the excess surge energy away from the equipment and into the ground.

The P4KE400CA-G is particularly suitable for a wide range of applications, such as automotive, as its low clamping voltage of 28V enables the TVS-diode to protect sensitive microprocessors against such voltage transients. Also, this diode can be used in the CCTV industry due to its low capacitance and fast response time of only 8/20μs. Furthermore, the P4KE400CA-G is also advantageous for protecting telecommunication equipment, as it has an impressive surge rating of 20A and a maximum power dissipation of 450mW, which makes it suitable for higher surges as well.

In conclusion, the P4KE400CA-G TVS-diode provides reliable surge protection for various applications due to its excellent design and features. With its low capacitance, fast response time, low clamping voltage, and impressive surge rating, it is a great choice for protecting sensitive electronic components and equipment from voltage transients.

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