SMB8J16CA-M3/5B Circuit Protection

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TVS diodes are protective components designed to protect vulnerable circuits from electrical overstress, such as lightning, electrostatic discharge, or power surges resulting from normal circuit operation. They are used in all kinds of industry applications, including communications, automotive, industrial, consumer, medical, and aerospace/defense, as well as in AC adapters for powering many electronic devices. The SMB8J16CA-M3/5B, in particular, is a 600W unimodal UniDir low capacitance Transient Voltage Suppressor (TVS) Diode designed to protect sensitive electronics from destructive voltage transients. This TVS diode is optimized for overvoltage protection in electronic applications and is particularly suitable for protecting equipment in telecoms central offices.

The SMB8J16CA-M3/5B can typically clamp transient voltage in excess of 8.1V, and handle up to 600W peak pulse power when specified pulse conditions are met. It is also lead (Pb) free, complying with Restriction of Hazardous Substances (RoHS) requirements. This TVS diode features low capacitance and low leakage current, which makes it suitable for applications that require protection against high ESD spikes, such as the Ethernet ports on PCs. The SMB8J16CA-M3/5B, being surface mounted, is equally suitable for automated assembly equipment.

The SMB8J16CA-M3/5B is available in multiple package styles, including SOT-23 and SMA. The device features fast response time and a temperature coefficient of less than 50 ppm/°C, making it suitable for use in applications with temperature swings. The typical maximum reverse stand-off voltage of the device is 16V.

The working principle of the SMB8J16CA-M3/5B involves a junction between two separate semiconductor elements, p-type and n-type silicon. During normal operation, electricity passes through the diode from the anode to the cathode, but the voltage across the diode never exceeds a certain voltage limit. When this limit is exceeded, the junction breaks down and diverts the current away from the protected load.

In the case of overvoltage protection, the TVS diode helps to limit the voltage from passing into a connected electronic device, thus preventing damage from overvoltage or an ESD surge. The diode’s fast response time works to divert the overvoltage current away from the device before any damage can be done. During normal operation, the device limits the voltage to a safe level and then quickly restores the voltage back to its nominal level.

The SMB8J16CA-M3/5B has many application fields, including Ethernet ports on PCs, telecom central offices, routers, switches, and the protection of sensitive ICs from overvoltage and ESD surges in industrial applications. As the device is highly reliable and easy to use in automated assembly, it is also suitable for many other electronics protection applications.

The SMB8J16CA-M3/5B is a fast-responding and reliable device designed to protect electronic systems from high levels of overvoltage and ESD surges. Its low leakage current and low capacitance make it suitable for a wide variety of electronic applications, while its fast response time ensures effective protection against overvoltage and ESD events.

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