SMCJ18C

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The SMCJ18C is a unidirectional Transient Voltage Suppressor diode (TVS), designed to protect sensitive electronics from over-voltage or surge conditions. It is a key component of a circuit\'s protection system and is available in various package sizes, such as DO-13, SOT-23 and SMA. This diode can not only suppress ESD transients, it can also suppress lightning, switch-mode power supply transients, and inductive kick-back transients.

The SMCJ18C is the most common TVS diode, used to protect against transient over-voltages. This diode is fabricated on a Zener based circuit in two-lead SMA, DO-220 or surface mount packages and is available in a wide range of breakdown voltages, from 5V to 400V. It has an excellent clamping and surge-handling capability, as well as low dynamic resistance. The diode can be used in various applications such as smart-phone, medical, industrial, power supply, computers, communications, automotive, consumer and more.

The main function of a TVS diode is to protect a circuit by clamping high-voltage transients to a safe level, while allowing normal DC operating voltage. When a transient exceeding the breakdown voltage of the diode occurs, it will turn on instantaneously and shunts the transient away from the protected circuit. The diode will remain on until the transient dissipates and then the diode will turn off.

The SMCJ18C is specially designed to handle low and medium-to-high voltage transients, with a peak surge capability up to 5KA (820V peak). It offers excellent protection for components and can help protect against voltage conditions from 65V to 400V depending on the breakdown voltage of the diode. It has a wide operating temperature range of -55°C to +150°C, a response time of less than 1ns and a high surge current rating of 5KA (8/20μs).

The SMCJ18C diode is an extremely rugged and reliable device and is suitable for harsh environment applications. It features an extremely low dynamic resistance and is ideal for applications where sustained over-voltage protection is needed. It is widely used in automotive, consumer electronics, medical and commercial applications, where robust and reliable ESD protection is required.

SMCJ18C diodes can be used to protect a variety of electrical devices from over-voltages or surges. They are a popular choice due to their robust design, wide range of operating temperatures, and excellent surge-handling capability. For these reasons, the SMCJ18C diodes are becoming increasingly popular for applications requiring reliable, protective circuitry.

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