SP0402U-ULC-02ETG Circuit Protection

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TVS (transient voltage suppressor) diodes are semiconductor devices designed to protect sensitive equipment from high-voltage transients caused by electrostatic discharge (ESD), electrical overstress (EOS) and other sources. The SP0402U-ULC-02ETG is a TVS diode designed to limit transient voltage. It is a unidirectional device, meaning it only allows electric current to flow in one direction, and it is designed for surface mounting on printed circuit boards.

Application field and working principle

The SP0402U-ULC-02ETG is designed for use in all types of communications systems such as data networks, telephone equipment, wireless systems, base station equipment, and consumer electronics. It is an ideal protection solution for protecting sensitive ICs, as well as TVS diodes for low voltage applications.

The device works by using a combination of two technologies. The first is a series of Zener diode devices connected in parallel. Zener diodes have a breakdown voltage, which is the voltage at which electric current begins to flow through them when exposed to a higher voltage. When voltage over the breakdown threshold is reached, the Zener diodes become activated and allow current to flow.

The second technology used is a non-linear circuit element known as an integrated cliff device. The integrated cliff device is designed to quickly reduce the voltage over the breakdown threshold by presenting a high resistance impedance when voltage rises above the threshold. When the voltage exceeds the threshold, the impedance of the cliff device immediately becomes low, providing protection against fast rise times.

The SP0402U-ULC-02ETG is a bi-directional TVS diode, meaning it can be used to protect two different circuits from transients, allowing current to flow both directions. The diode can handle up to 5A of peak pulse current and an outstanding surge current rating of 22.5A. The device also has an excellent clamping voltage of 26V and a low capacitance of 0.22pF, allowing for quicker response time to transients. The device has an operating voltage range of 5.5V to 40V, making it suitable for a wide range of applications.

The SP0402U-ULC-02ETG is an ideal solution for protecting sensitive ICs from transients produced by ESD and EOS events, allowing system designers to reduce system cost by eliminating the need for multiple separate components. The small package size of this device also makes it a good choice for space-constrained boards. Additionally, the device comes with an RoHS-compliant lead-free package, making it suitable for use in environmentally-sensitive applications.

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