SMAJ18A-13-F

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TVS diodes, also known as Transient Voltage Suppressors (TVSs), are a type of semiconductor diode that provides protection against voltage spikes. The SMAJ18A-13-F is a unidirectional TVS diode designed specifically for protection against overvoltage transients. This device offers excellent performance characteristics, including low leakage under high reverse voltage, fast response time, and low capacitance for high-speed data transmission.

Application Field

The SMAJ18A-13-F is most commonly used in automotive applications, including power supplies, touch screens, and control units. Its primary function is to provide protection against electrostatic discharge (ESD) events, which are transients with very fast rise and fall times. This device is also used in electrical and communication systems to protect against transient overvoltage events. Some additional applications include residential and commercial lighting systems, as well as medical and industrial equipment.

Working Principle

The SMAJ18A-13-F works by clamping the voltage spike, limiting any overvoltage events that might otherwise damage sensitive components. This device has a breakdown voltage between 14 volts and 17 volts, with a maximum clamping voltage of approximately 30 volts. When an overvoltage transient is detected, the diode’s extremely fast response time limits the potential damage to electrical components. During this process, the SMAJ18A-13-F acts as a shunt, diverting the voltage to ground while absorbing the energy of the transient.

The SMAJ18A-13-F is designed to provide protection against ESD events with rise and fall times of up to 5 nanoseconds. It has a low capacitance of 15 pF, which makes it ideal for high-speed data transmission applications. This device also has a low reverse leakage of 0.001 μA, making it suitable for use in high reverse voltage systems, such as automotive electronic control units (ECUs).

The SMAJ18A-13-F is a robust and reliable device that can protect against voltage transients and ESD events, ensuring that sensitive components remain unharmed and functioning properly. It has an extended power dissipation up to 500 mW, making it suitable for a wide range of applications. Additionally, the SMAJ18A-13-F is RoHS compliant, making it an ideal choice for environmentally conscious designs.

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