SMF85A-T13

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TVS - Diodes (Transient Voltage Suppressor - Diodes) are over-voltage protection devices commonly used in electronic circuits to protect against voltage spikes, surges, ESD, and lightning/power surges. In this article, we’ll discuss the application field and working principle of the SMF85A-T13 TVS diode. The SMF85A-T13 is a unidirectional, low-power, transient voltage suppressor diode. It is designed for protecting sensitive electronic equipment against voltage spikes, ESD, and transient surges. The device features a wide operating temperature range (from -55°C to 150°C), with a maximum forward surge current of 1A. Its maximum peak pulse voltage rating is 5V, with a breakdown voltage rating of 4.7V.

The SMF85A-T13 is used in consumer electronic systems, such as phones, computers, and TVs, as well as automotive and industrial applications. The device can also be used in applications where the operating voltage range is less than 4.7V, such as in battery-powered circuits. It is also used to protect sensitive logic ICs, such as flip-flops and logic gates, from voltage spikes and transient waveforms.

How does the SMF85A-T13 work? The device is composed of two main components: the anode and the cathode. When the anode is subjected to a positive voltage, it creates a current flow between the two terminals, causing the diode to conduct and a clamp voltage appears across it. The voltage across the diode is then limited to the breakdown voltage rating (4.7V) of the device. The reverse breakdown voltage rating is also important, as it limits the amount of current that can flow through the device.

The SMF85A-T13 has a low leakage current, which helps to reduce power consumption and heat generation. It is also designed with a low capacitance, which helps to reduce the ringing and FM mismatch of high-speed data lines. Finally, the device has a low thermal resistance, which helps to improve the reliability of the system by allowing for increased power dissipation.

In conclusion, the SMF85A-T13 is a unidirectional low-power transient voltage suppressor diode. It is designed for protecting sensitive electronic equipment against voltage spikes, ESD, and transient surges. The device has a wide operating temperature range, a high peak pulse voltage rating, a low leakage current, and a low capacitance, which makes it suitable for use in consumer electronic systems, automotive and industrial applications, as well as battery-powered circuits.

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