SMLJ58CE3/TR13

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TVS (Transient Voltage Suppressor) Diodes are specially designed devices used to protect electrical equipment from transient voltage surges that exceed the normal operating voltage range. The SMLJ58CE3/TR13 is an unidirectional transient voltage suppressor diode designed to absorb transient energy pulses with amplitudes between 8.3 and 23.8 Volts, and can be used to limit the surge current. This device is designed for use in low-power applications such as consumer electronic, telecommunication, and other low-voltage industrial applications.

The SMLJ58CE3/TR13 is a discrete voltage protection device with an operating voltage range of 8.3 to 23.8 Volts in a small SOT-23 package. It consists of a diode housing within a foam-filled plastic enclosure, with a ceramic-filled mechanical spring contact for the diode gas discharge tube (GDT) element. The GDT element is a voltage-dependent device which triggers an avalanche breakdown when a predetermined voltage level is exceeded.

The SMLJ58CE3/TR13 has a low clamping voltage which allows it to absorb spikes up to 23.8 Volts without any significant changes in parameters like capacitance, current leakage, and resistance. Additionally, it can operate at high temperatures, up to 125 degrees Celsius, and offers good surge-handling capabilities. As a result, the SMLJ58CE3/TR13 is an excellent choice for low-power consumer electronics applications where transient voltage protection is required.

The working principle of the SMLJ58CE3/TR13 is simple. When the voltage at the diode’s anode exceeds its maximum specified level, the diode triggers an avalanche breakdown due to the avalanche multiplication of carriers. This breakdown triggers an electron-hole pair avalanche that generates a large current, which clamps the voltage to a predetermined level. The current generated is limited by the device’s on-state resistance. The device then enters a breakdown state, and remains in this state until the voltage at the anode has been reduced below the specified level. The SMLJ58CE3/TR13 will then switch back to its blocked state and resume normal operation.

The SMLJ58CE3/TR13 has several application uses; these include DC-to-DC converters, over-voltage protection, and low voltage DC power supplies. Additionally, it can be used in low-impedance circuits to provide protection against electrostatic discharges (ESD) and other transient voltage surges. The small size of the SMLJ58CE3/TR13 makes it particularly suitable for use in tight, space-constrained designs, while its good surge-handling capability and low clamping voltage make it an ideal choice for consumer electronics applications, where over-voltage and ESD protection are required.

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