SMBJ440CE3/TR13 Circuit Protection

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TVS diodes, also known as avalanche diodes, are specialized diodes designed to protect against voltage transients in electronic circuits. The SMBJ440CE3/TR13 is a unidirectional Transient Voltage Suppressor Diode specifically designed to protect components from transient over voltage conditions associated with inductive switching loads. In this article, we will discuss the application field and working principle of the SMBJ440CE3/TR13.

The SMBJ440CE3/TR13 has a wide range of applications, particularly in the automotive and industrial industry. It is suitable for powering automotive and industrial switches and relays, providing robust protection against current surges and voltage overshoots. For instance, it can be used for suppressing high voltage transients generated by inductive switching of motors or solenoid actuators for automotive, industrial and other similar applications. It can also be used to provide protection against voltage transients caused by lightning strikes.

The SMBJ440CE3/TR13 is designed to perform under a wide range of environmental conditions, including low-temperature environments. It is able to operate at temperatures ranging from -65°C to +175°C, making it ideal for applications in the automotive and industrial industry. It is also resistant to dust and water, meaning it can be used in outdoor applications such as railway, street lighting, and mining.

The working principle of the SMBJ440CE3/TR13 involves two different elements. One element is the diode itself, which is made from silicon and behaves like a typical diode when a voltage is applied across it. The second element is a resistance element, which helps to reduce the voltage or current across the diode. This enables it to respond quickly to transient over voltage conditions, protecting the components in the circuit from damage.

The SMBJ440CE3/TR13 can protect against voltage transients of up to 40V, with a peak pulse power rating of 1450W at 10/1000μs and an energy rating of 20J. It features a low clamping voltage of 12.5V at a maximum surge current of 300A, an outstanding level of protection for a wide range of applications.

In conclusion, the SMBJ440CE3/TR13 is a unidirectional Transient Voltage Suppressor Diode specifically designed to provide protection against voltage transients caused by lightning strikes, inductive switching of motors or solenoid actuators and other similar overvoltage conditions. It is suitable for a wide range of applications in the automotive and industrial industries, featuring a low clamping voltage and high energy rating. It is also suitable for low-temperature applications and resistant to dust and water, making it suitable for outdoor applications as well.

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