DFLT51A-7 Circuit Protection

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TVS (Transient Voltage Suppression) diodes are electronic components that protect sensitive electronics components or applications from voltage spikes. The DFLT51A-7 is one such diode, which provides a cost-effective and reliable way to protect vulnerable systems from potential voltage transients. This document outlines the applications and working principles of DFLT51A-7.

Application Field

The DFLT51A-7 is a voltage suppressor diode specifically designed for very low power systems. It is particularly suitable for applications where short duration voltage transients are likely to occur. These transients may be due to lightning strikes, induced power surges, driver errors, and electrostatic discharge. The DFLT51A-7 can also be used to safeguard larger power systems against sudden overloads.

The DFLT51A-7 can be found in a wide range of applications, such as medical implants, aerospace components, robots, microcontrollers, and telecommunication systems. In each of these systems, the DFLT51A-7 plays a crucial role in protecting the device from damage caused by voltage spikes.

In addition, the DFLT51A-7 is also suitable for automotive applications, as it can withstand transient battery voltages of up to 42 volts. The device is also capable of handling currents up to 100mA, making it ideally suited for load shedding applications.

Working Principle

The DFLT51A-7 is designed to automatically disconnect an open circuit when the voltage reaches a specified threshold. This is done by combining a fast switching FET, Schottky diode, and a Zener diode. When the voltage exceeds the Zener diode\'s breakdown voltage, the device is disconnected. This effectively reduces the amount of voltage that is allowed to flow into the system, thus protecting it from being damaged.

The DFLT51A-7 also features an on-chip metal oxide varistor (MOV) which is triggered by a voltage surge above its clamping voltage. This is designed to reduce any high-amplitude transients that may have been generated from the source. The MOV also helps to reduce the cumulative energy dissipated by the device, thus further minimizing the chances of damage.

In addition, the DFLT51A-7 also exhibits low clamping losses and low capacitance. This helps to reduce the effects of long-term transients on the system, and also ensures that the device is less susceptible to EMI.

Finally, the DFLT51A-7 is also designed to dissipate a minimal amount of power. This helps to ensure that the device does not interfere with the operation of the system, and also helps to reduce operating costs.

In summary, the DFLT51A-7 is a reliable and cost-effective voltage suppressor diode that is designed for very low power systems. It is capable of protecting these systems from sudden overloads and short duration voltage transients, and is suitable for a wide range of applications. The device also features an on-chip MOV, low clamping losses and low capacitance, and minimal power dissipation, making it an ideal choice for protecting sensitive electronics components or applications.

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