1KSMB12A Circuit Protection

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TVS-Diodes provide enhanced protection from electrostatic discharges (ESD), transients, and high-voltage spikes resulting from lightning, AC line-induced surges, and DC power cross. The 1KSMB12A is an example of such a diode, which combines the required voltage clamping, and on-state resistance with a uniquely low capacitance. This makes it ideal for applications such as USB protection, automotive, Ethernet / Industrial Protocols (CAN, RS-232).

The 1KSMB12A is a 12 Volts bi-directional transient voltage suppression diode. It features an ultra-low capacitance of 8pF typical, which enables it to protect devices from very high-frequency transient events that can interfere with a device\'s normal function. Additionally, it features a significantly low leakage current of 0.1mA.

A key feature of the 1KSMB12A is its very low dynamic resistance, which is 0.1Ω. This means that during normal operation it offers virtually no capacitance, meaning that signal integrity and performance will not be degraded by the protection device itself. The 1KSMB12A can also handle up to 120A peak pulse current, reducing the likelihood of ESD or other voltage transients damaging connected devices such as in USB/Ethernet applications.

The 1KSMB12A voltage suppression diode is designed to provide reliable protection of up to 12 Volts for industrial applications, including robotic process automation and similar mission-critical applications. Its low capacitance makes it ideal for non-invasive ESD protection. Also, its high peak pulse current capability ensures that any fast electrical transients will be dissipated by the diode itself without damaging the connected device.

The working principle of the 1KSMB12A is relatively straightforward. It is a uni-directional device, meaning that it is designed to be used in series with the electrical signal, and during normal operation it blocks any current flow. When a voltage spike or transient occurs, the device conducts current away from the protected equipment, thus providing transient voltage suppression. This makes it ideal for a wide range of applications where protection against electrical transients or ESD is required.

In summary, the 1KSMB12A is a 12 Volts bi-directional transient voltage suppression diode that is designed to protect electronics from electrostatic discharges, transients, and high-voltage spikes. It features a very low dynamic resistance and capacitance, as well as a high peak pulse current capability, making it ideal for applications such as USB protection, automotive, and industrial protocols. Its simple design principle ensures reliable protection while preserving signal integrity and performance.

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