MXLSMBJ85CAE3 Circuit Protection

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A Transient Voltage Suppressor Diode, more commonly known as a TVS Diode, is a semiconductor device used for the protection of other sensitive electronic components against overvoltage transients. The MXLSMBJ85CAE3 is a three-terminal unidirectional Transient Voltage Suppression (TVS) diode with flame-retardant resin possessing excellent clamping capability, and fast response time. It has an operating temperature range of -55C to + 150C.

When an undesirable overvoltage transient is applied to the MXLSMBJ85CAE3, it is activated and begins to conduct to reduce the magnitude of the transient to levels that are not harmful to subsequent components. The maximum peak pulse power dissipation capability of the device is 650 Watts, and its typical clamping voltage is 15.9V at 1A.

This device is typically used in AC line surge current clamping circuits, lighting protection, RF protection, telecommunication protection and other similar applications. It is also used to protect personal equipment such as refrigerators and washing machines from extremely high or low-voltage surges or dips during power outages. Additionally, it can be used as a voltage regulator to ensure that the right level of supply voltage is passed to the sensitive components. In automotive applications, it is mostly used in order to protect the electronics against the high voltage transients created by the ignition system or other associated components, such as those related to alternators or electric fans.

The MXLSMBJ85CAE3 TVS Diode utilizes a 3-terminal configuration: a line cathode, an earth cathode and an anode. When voltage exceeding the breakdown voltage is applied between the line and the earth cathodes, the device becomes conductive and starts to act as a short path for the transient. This causes the supply voltage for the equipment or appliance to reduce, thereby preventing any dangerous overvoltage from damaging the delicate components connected to the circuit.

In order to better protect the device itself from the massive surge of power, it should always be connected in parallel with some kind of protective element, such as a fuse or a resistor. This will limit the current that can flow through the diode, protecting it from destruction due to excessive heat or power dissipation.

The MXLSMBJ85CAE3 has a wide working range, and its highly efficient clamping action makes it ideal for most applications, such as automotive, industrial and consumer electronics. Its excellent performance characteristics, wide operating range and fast response time make it one of the most widely used TVS diodes available. Its robust design ensures that it will provide reliable protection to the circuit it is connected to, and it is very straightforward and easy to install.

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