SMBJ70A-13

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TVS - diodes are components used in electrical circuits for the purpose of protecting against electrical transients, often referred to as "spikes". These transient events can cause considerable damage to sensitive electronics and the TVS - diodes are a critical component in protecting against these events. The SMBJ70A-13 is a particular type of device in this category, and understanding its operation and applications is essential for designing and constructing robust circuits.

The SMBJ70A-13 is an uni-directional device, designed to protect downstream components from transient voltages. It is a two terminal device and when operating correctly, the flow of current occurs in only one direction. The device features a maximum breakdown voltage of 70 V, ensuring it is suitable for a wide range of circuits. It is also capable of handling transients of up to 1500 watts per line, enough to protect most component types.

The working principle of the SMBJ70A-13 is based on the Avalanche breakdown of a semiconductor material – specifically the silicon dioxide used in the fabrication of the device. When the threshold breakdown voltage is exceeded, the device will rapidly switch from its high impedance state to its low impedance state, providing a clamping action which limits the voltage at downstream components. The device can also absorb energy of up to 1500 watts for the duration of the transient event without permanent damage, provided it does not exceed its Peak Power rating.

The SMBJ70A-13 device is particularly suitable for protecting components in high reliability and/or high temperature applications, as it can both withstand a broad range of voltages and temperatures. This makes it a very popular choice for applications in Energy Storage Systems, data networks, LED lighting and IoT systems, with these components all vulnerable to voltage transients. It can also be employed in Power conversion circuits to protect against high voltage, high power transients.

It is important to note that the presence of the SMBJ70A-13 does not guarantee complete protection against voltage transients – it is reliant upon correct design and construction practices being followed to ensure effective protection. This includes the use of appropriate components and grounding techniques. When correctly employed, however, the SMBJ70A-13 can provide a reliable and robust means of limiting voltage transients and protecting downstream components in a variety of applications.

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