SMP18A-E3/85A

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TVS – diodes are commonly used to protect sensitive electronics and to suppress transient surges from lightning strikes, automotive and industrial inductive loads, etc. The SMP18A-E3/85A is the ultimate protection device for these types of applications due to its low capacitance and low leakage current characteristics. The SMP18A-E3/85A is a subminiature thick-film Transient Voltage Suppression (TVS) diode designed to protect sensitive electronic components from high energy transients caused by lightning strikes, industrial and automotive inductive loads, etc. The device features a unique design that minimizes capacitance and leakage current for superior protection in high frequency applications. The SMP18A-E3/85A is a subminiature surface mount diode package designed to provide excellent performance and ruggedness for a diverse range of applications. It is rated at 250W peak pulse power (t=8/20 us) and has a maximum peak pulse current of 18A (t=8/20 us). Its low on-state impedance and fast response time make it ideal for applications such as data lines, automotive power lines, and sensitive electronics.

The working principle of the SMP18A-E3/85A is based on the so-called “avalanche” or “zener” effect. When the anode is more positive than the cathode, electrons are suddenly released and they move toward the anode and create an avalanche of electrons. This creates a rapid increase in current and voltage across the diode, which quickly dissipates the applied voltage. This results in a “clamping” action, which reduces the voltage to a safe level.

The SMP18A-E3/85A is ideal for a wide range of applications, such as: automotive and industrial inductive loads; lightning protection; telecommunications; data line protection; LVDS; and sensitive electronics. It is also an excellent choice for circuit protection against high energy surges such as transients, ESD, EFT, etc. The device has a low capacitance and low leakage current characteristics, making it suitable for use in high frequency applications. Furthermore, its small size makes it ideal for applications with space limitations.

In conclusion, the SMP18A-E3/85A is a subminiature surface mount diode designed to provide excellent performance and ruggedness for a diverse range of applications. Its low on-state impedance and fast response time, coupled with its low capacitance and leakage current characteristics, make it an ideal choice for automotive power line, data line, telecom, and lightning protection applications requiring superior protection from high energy transients.

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