SM6T39A

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SM6T39A is a unidirectional Transient Voltage Suppressor (TVS) diode, which limits the voltage on its input to a safe limit by mostly suppressing the transient voltage spikes on its input. This diode is mainly used in automotive, consumer, industrial and communication applications. It is also found in protection schemes based on vehicles, computers, and consumer portable electronics.

The SM6T39A has a maximum power rating of 250 mW and a voltage breakdown of 12V. Its reverse voltage is 5.0 V and its peak pulse power is up to 1150 W. The device has an operating temperature range of -55 °C to 150 °C and a thermal resistance between -40 to 85°C of 440 K/W. As far as the body size of the SM6T39A diode is concerned, it is packaged in a SOT-23-3 configuration.

The SM6T39A diode works on the principle of avalanche breakdown. When a transient voltage spike increases the input voltage beyond the breakdown voltage of the device, the thin layer between P and N type materials of the diode gets broken and a high electric field is created by the electric charge, which results in a heavy current flow through the diode. This current flow is responsible for clamping the applied voltage to a safe voltage level.

The SM6T39A diode is mainly used in automotive load dump protection applications, where a properly designed circuit is required to limit the peak output voltage to a safe level. The device is also used in other automotive applications including battery transient protection, negative voltage transients, load dump protection, and power line transient protection. Moreover, it is also used in consumer and communication applications such as personal computing protection, line Protector Modules (LPMs), Fax/Modem and DSL protection, and Audio Amplifier Protection Circuitry (APC).

The SM6T39A TVS diode provides efficient reverse and transient voltage protection, low on-state resistance and low operating power loss. Its low operating voltage and small size make it suitable for a wide range of automotive, consumer and communication applications, where a properly designed protection circuitry is required to limit the peak output voltage to a safe level.

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