DFLT40A-7 Circuit Protection

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The DFLT40A-7 is a high-current TVS Diode in the SMA package. It is designed to protect sensitive electronic equipment from transients produced by lightning and other heavy duty electrical equipment. Its outstanding performance characteristics allow the device to be used in a variety of applications such as mobile base stations, cellular phones, industrial control systems, and medical electrical equipment.

The DFLT40A-7 is manufactured utilizing a three-pin SMA-type package. It is composed of two terminal colocating PN-type series connected diodes placed inside a ceramic case. The ceramic case provides a high degree of isolation from external electrical disturbances. The top two terminals are connected to the case by lead wires and the bottom two terminals are connected to the diode’s collector-emitter-base. The diode can be used in circuits with up to 900V.

The working principle of the DFLT40A-7 depends on the electrostatic charge method used to reduce the excess localized energy on board. The diode works when a positive ion bombards the anode and the positive potential attracts electrons from the emitter resulting in a current flow from the emitter to the anode. Under normal conditions, no current passes through the diode. When a surge of higher voltage travels through the diode, the voltage will cause an avalanche breakdown, quickly discharging the transient voltage.

The DFLT40A-7 has various qualities that make it suitable for protecting against a variety of transient voltages. It features an operating voltage range of 5V to 900V and a maximum peak pulse power of 100W. The diode also has a low capacitance of 1pF and a low total capacitance of 6pF. It has a low breakdown voltage of 2.5V and a fast response time of less than 1ns, making it suitable for both high-speed and low-speed digital applications.

The DFLT40A-7 is a versatile TVS diode suitable for a wide range of application fields. It can be used in industrial control systems, medical electrical equipment, mobile base stations, and cellular phones to protect these vulnerable systems from the potentially damaging effects of transients. Its low capacitance and fast response time make it a perfect fit for both digital and analog applications.

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