SMLJ64E3/TR13

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TVS diodes, also called transient voltage suppressors (TVSs) are specialized semiconductor devices designed to protect circuits from externally induced electrical transients, which are short surge current pulses of high amplitude. They provide a fast response time in the nanosecond range to clamp high-voltage transients and prevent catastrophic failures to downstream electronic circuits.

SMLJ64E3/TR13 is a unidirectional, high-voltage rated, low-capacitance TVS diode series designed to protect telecommunication, network interface, data, and power circuits from high voltage transients.

Application Field

The low-capacitance SMLJ64E3/TR13 TVS diodes are ideal for protecting digital lines against ESD, EFT, and lightning events. The low capacitance rating of .04pF helps to minimize signal degradation and provides robust surge protection for bus lines, twisted-pair cables, and other high-speed data signals. It also protects Ethernet, USB, and other communication systems, and power applications from external surges. Moreover, SMLJ64E3/TR13 components are designed to dissipate power over 8/20μs waveforms and are AEC-Q101 qualified, making them suitable to use in automotive applications.

Working Principle

TVS diodes are characterized as silicon avalanche diodes, which provide a high peak pulse current rating. These diodes are able to conduct current at a clamped voltage level for short periods of time. In normal operation, the TVS diode passes no current other than the reverse leakages current. When a transient is present, the reverse breakdown voltage is exceeded, and a heavy avalanche current is passed to ground clamps the voltage. The SMLJ64E3/TR13 devices are designed to protect against catastrophic failures, withstanding an 8/20μs waveform discharge of up to +26kV for air and +15kV for contact discharge. The TVS diodes help to reduce electrostatic discharge (ESD) or electro-magnetic interference race-through, which is unacceptable in the telecommunication industry.

SMLJ64E3/TR13 is an unidirectional TVS diode that usually conducts current in one direction and opens in the other direction to reduce the risk of ground loop and short circuit. The SMLJ64E3/TR13 has a breakdown voltage range of 91.0 to 100.0 V and a peak pulse power of 2500 W. The maximum junction capacitance is 4.0 pF and the maximum peak reverse surge current is 4.5 A.

The SMLJ64E3/TR13 also includes clamper diodes, which protect multiple points in the system from voltage spikes. A clamper diode is a pair of diodes that is connected in parallel between the signal source and the ground line of a circuit. It helps to stop the level of the voltage pulsing from exceeding a certain level when current is being passed through it. It also helps to minimize the amplitude of a switching spike and noise signals.

To sum up, the SMLJ64E3/TR13 TVS diode is an excellent option for providing surge protection for telecommunication, network interface, data, and power applications. It provides robust surge protection for bus lines, twisted-pair cables, and other high-speed data signals. Moreover, its low capacitance rating helps to minimize signal degradation and its AEC-Q101 qualification makes it suitable for automotive applications.

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