SMCJ40CA-E3/9AT

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TVS diodes are a form of electrical protection, specifically designed to safeguard sensitive electronic equipment from damage caused by transient voltage spikes. The SMCJ40CA-E3/9AT is a type of unidirectional TVS diode designed to protect against effects of electrostatic discharge (ESD) on systems. In this article we will discuss the application field of the SMCJ40CA-E3/9AT, as well as its operating principle.

TVS diodes, including the SMCJ40CA-E3/9AT, are well-suited to industrial, automotive, telecom, and consumer electronics applications. For instance, in the industrial field, these components are commonly used to protect circuits or devices susceptible to ESD or voltage surge transient damage. In automotive systems, TVS diodes protect the ECM, body systems, and telematics from voltage transients caused by lightning strikes or nearby high-voltage arcing. Another practical application for these components is found within telecom equipment installations and on instruments used in communication systems.

The SMCJ40CA-E3/9AT is a unidirectional TVS diode with bi-directional peak pulse pulse power dissipation of 400 watts and rated breakdown voltage of 38 volts. It is designed to protect against six-kilo-volt ESD pulses and fifteen-kilo-volt surge pulsed, due to a high-clamping voltage rating of 75 volts.

The component is widely used in telecom and IT systems because of its high-power capability, standard-level package size, and low-profile height profile – the fact that the SMCJ40CA-E3/9AT is only 2 mm tall allows for installation in cramped system bays or between awkward layouts. Furthermore, it has an ultra-broadband performance and small junction capacitance which makes it ideal for high-frequency applications.

The SMCJ40CA-E3/9AT operates on the principal of a Zener effect diode. When a voltage surge or ESD pulse is input, the component’s junction capacitance causes a rapid breakdown and the excess voltage veers off into the diode’s reverse bias region. When the initial surge is dissipated, the diode returns to its non-conductive stationary position and the system is left unharmed.

Thus, the SMCJ40CA-E3/9AT is a type of unidirectional TVS diode designed for use in industrial, telecom, automotive, and consumer electronics applications. It offers robust protection against six-kilo-volt ESD pulses and fifteen-kilo-volt surge pulses, due to its 500/400 watt peak pulse power and 75-volt clamping voltage. Operating by the Zener effect diode principle, it is suitable for use in cramped or complicated system layouts, because of its small overall size and low profile height.

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