SMLJ45CE3/TR13

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TVS - Diodes

A transient voltage suppressor (TVS) diode is an electronic component that is very similar to a regular diode in that it allows current to flow in one direction only; however, unlike a regular diode, a TVS diode can withstand extremely high voltages and is designed to absorb excess energy in order to protect sensitive components from voltage spikes. One such component is the SMLJ45CE3/TR13.

Application field

The SMLJ45CE3/TR13 is a low capacitance uni-directional TVS diode with a low stand-off voltage. It is used in many applications: in automotive, computer, consumer, lighting, and industrial fields. More specifically, it is used to protect sensitive components from high voltage transient pulses, such as those from switching power supplies, temporary faults on power grids, and electrostatic discharge (ESD). For instance, in automobile electronics, it can protect circuits from the high voltage transients generated by ignition systems.

Working Principle

The SMLJ45CE3/TR13 works by providing a path for current to flow away from vulnerable components when a voltage spike occurs. It is essentially a diode with a very high breakdown voltage and reverse current leakage. When the voltage increases above a certain level, the diode becomes “forward biased” and conducts current to protect the circuit. As the voltage decreases again, the diode returns to its non-conducting (reverse-biased) state.

The SMLJ45CE3/TR13 is designed to provide a very low clamping voltage, meaning it has a low forward voltage drop when conducting current. This ensures that no additional power is wasted when the voltage spike occurs.

Since the SMLJ45CE3/TR13 is uni-directional, it is not suited for use in applications where the direction of the voltage spike changes. It has an operating temperature range of -55°C to 150°C, and is optimized for use in low-noise, high-frequency applications.

Conclusion

The SMLJ45CE3/TR13 is a low capacitance uni-directional TVS diode with a low stand-off voltage. It is designed to protect sensitive components from high voltage transient pulses, such as those from switching power supplies, temporary faults on power grids, and electrostatic discharge (ESD). It works by providing a path for current to flow away from vulnerable components when a voltage spike occurs, and has a low forward voltage drop when conducting current to ensure no additional power is wasted. The SMLJ45CE3/TR13 is widely used in the automotive, computer, consumer, lighting, and industrial fields.

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