SMBJ26CA

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SMBJ26CA is a type of transient voltage suppressor (TVS) diode. TVS diodes are electronic devices used for protecting components and circuits from over-voltage transients and other forms of electrical stress. The SMBJ26CA is designed to protect against transients up to 26 volts. It is an uni-directional device, with a maximum peak pulse current of 11.5A (8/20μs pulses).

The TVS diode is a form of a zener diode. Zener diodes are made of two pieces of semiconductor material joined together at one end, forming a PN junction. When a current passes through the junction, it causes a voltage drop – known as the ‘Zener voltage’ – across the diode. The Zener voltage is a function of the materials used in the diode and is typically in the range of 5 to 40 volts. The SMBJ26CA TVS diode is designed to operate at 26 volts.

The main difference between a TVS diode and a Zener diode is that a TVS diode is designed to handle much higher levels of power. TVS diodes are made with multiple PN-junctions connected in series and/or parallel, which can handle much higher overflows of current. The SMBJ26CA is designed to provide protection from transients up to 26 volts and 11.5A peak pulse current.

The working principle of a SMBJ26CA is relatively simple; when a voltage pulse or transient voltage occurs above the breakdown voltage, the diode switches from a low resistance state to a high-resistance state, allowing the excess voltage to be diverted away from the protected circuit. The diode then breaks down at its maximum voltage rating, resulting in a greatly reduced current flow through the diode. Once the voltage transient has dissipated, the diode will reset itself to its low resistance state.

The SMBJ26CA is commonly used in automotive, industrial, and consumer electronics applications to protect components and circuits from over-voltage transients which can cause damage or erratic operation of the equipment. Some common applications include protecting car radios, airbag ECUs, computers, LCD displays, and many other electronic devices. This diode is particularly suited for protecting electronic circuits against automotive transients which are often caused by voltage spikes from reverse inductance or the electromagnetic interference from nearby electrical or electronic equipment.

In conclusion, the SMBJ26CA is an effective component for protecting components and circuits from over-voltage transients. This diode is designed to provide protection from transients up to 26 volts and 11.5A peak pulse current. It is commonly used in automotive, industrial, and consumer electronics applications to protect components and circuits from over-voltage transients which can cause damage or erratic operation of the equipment. The working principle of a SMBJ26CA is relatively simple; when a voltage pulse or transient voltage occurs above the breakdown voltage, the diode switches from a low resistance state to a high-resistance state, allowing the excess voltage to be diverted away from the protected circuit.

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