SMF40A-T13

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The SMF40A-T13 is a transient voltage suppressor diode (TVS) that is used to protect sensitive electronic devices from transient voltage events and has a wide range of compatible application fields and working principles. The SMF40A-T13 is available in both leaded and surface mount packages and is suitable for power supplies and automotive applications.

The SMF40A-T13 is designed to protect electronic components from damages due to transient (surge) occurrences in a circuit. Transient voltage suppressors provide an ideal protection solution against the effects of overvoltage caused by lightning strikes, surges, inductive switching and other voltage spikes. The device helps to protect sensitive integrated circuits (ICs) and other related electronics from voltage events which can range from 90 V to 300 V, making it suited to both AC applications as well as DC applications.

The SMF40A-T13 is a trisilicon protector diode with a low-capacitance design so as to reduce system switching noise. It provides surge protection up to 40 A (withstand voltage of 75 V) and boasts an excellent voltage-clamping capability. This makes it suitable for power supplies and automotive environments where it can protect automotive ECUs from voltage transients.

The working principle of the SMF40A-T13 involves the use of a silicon diode junction to absorb excess energy and quickly clamp voltage upon an overload condition. The device is ideally suited to provide protection from line transients as well as transients generated by internal switching of power on/off devices. Upon detecting a voltage transient, the device starts to conduct resulting in the suppression or transfer of energy which then travels to the device’s internal resistor. The internal resistor then dissipates the absorbed energy and ensures that the voltage spike is clamped at the most voltage possible.

In addition to its excellent protection capabilities, the SMF40A-T13 offers a wide range of compatibility and mechanical features. The device comes with a wide operating temperature range of -55 degrees Celsius to 150 degrees Celsius, making it suitable for most industrial applications where environmental operations can vary. It also features a bidirectional path with a positive temperature coefficient, allowing the device to protect against overvoltage in both directions without requiring additional external components.

In summary, the SMF40A-T13 is a transient voltage suppressor diode and is available in leaded and surface mount packages. It provides surge protection up to 40 A and boasts an excellent voltage-clamping capability. The device has a wide operating temperature range and is suitable for power supplies, automotive environments and other industrial applications where protection from voltage transients is needed.

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