MXLSMLG75CAE3 Circuit Protection

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The MXLSMLG75CAE3 device – or transient voltage suppression diode – is widely used to protect sensitive electronic equipment and components from destructive overvoltage events. Developed by EPCOS, it belongs to the TVS – Diodes product series and makes use of Zener type action for clamping overvoltages at a set safe working level. This type of diode is capable of providing protection by absorbing voltage spikes and other transients that may be generated by lightning strikes, power grid instabilities, and induction from other equipment nearby. This device is an example of a unidirectional device – meaning it will only conduct current when the voltage is above its breakdown voltage and in the same direction as the arrow on the symbol markings, otherwise known as the anode. To protect against bidirectional transients, a dual type is available with two diodes placed in series back-to-back. This type of diode consists of a junction that is reversely biased until a particular voltage is exceeded. When the voltage reaches or exceeds this point – or breakdown voltage – current will flow through the junction of the diode and continue until the voltage reduces again. This is often referred to as the avalanche effect. The MXLSMLG75CAE3 is encapsulated in a SOD-323 plastic surface-mounted package – meaning it can be easily soldered for use in a range of compact electronic assemblies and PCBs. Voltage ratings for this device range from 5.0 to 75.0V. The main application area for this device is for EN certified and FCC approved overvoltage installations. This means it is suitable for use where telecommunications and control circuits that require a very low-letthrough voltage or clamp current is employed. Being a failed-safe rated device, the MXLSMLG75CAE3 is well suited to high reliability applications such as protective panels, surveillance systems, military and aerospace electronics, and ICT testers. Typically, the working principle of a transient voltage suppression diode provides protection in two ways – impedance and capacitance. This means it functions as an open circuit when maximum rated voltage is applied. The Zener type action then takes over, and the diode clamps the voltage to a safe working level. In addition, the capacitance of the device effectively becomes a short circuit when a voltage surge is present, allowing the voltage to pass through without increasing in magnitude. This reduces the possibility of damage or destruction to the protected equipment by supplying an alternate current path for the surge.The MXLSMLG75CAE3 diode offers excellent ESD protection with an IEC61000-4-2 (level 4) rating and wire-to-wire protections of ±8kV (air/contact). The device also provides enhanced current handling to 16.0A peak, with a low dynamic resistance and fast response time of just 1.1ns (I/O), making it ideal for pulse applications. In conclusion, this device is an example of a transient voltage suppression diode that is capable of providing protection against bidirectional transients. With a range of voltage ratings from 5.0 to 75.0V, this device offers exceptional ESD protection and fast response times making it suitable for various high reliability applications.

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