MRA4003T3 Discrete Semiconductor Products

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The MRA4003T3 is a single rectifier diode manufactured by PanJit Electronics. It has a forward voltage drop of 1.2V @ 100mA, a forward current of 4A, and a reverse voltage of 400V. It has a low thermal resistance and low forward voltage drop, making it ideal for a wide range of applications such as switching power supplies, synchronous rectification, general purpose rectification, and freewheeling protection. It also has a high breakdown voltage, which makes it suitable for use in high voltage circuits.

The MRA4003T3 is composed of two terminals, an anode and a cathode. It works by allowing current to flow in one direction (from anode to cathode) while blocking current in the other direction (from cathode to anode). When current flows through the anode-cathode pair, an electric field is developed across the junction of the two terminals, forcing current through the junction in the forward direction and blocking it in the reverse direction. This phenomenon is known as rectification and is the essential principle behind diodes.

The MRA4003T3 is commonly used in switching power supplies. In this application, it is used in place of an ordinary transistor switch to control the flow of current. When a voltage is applied to the anode, the diode will conduct current, allowing it to flow through the circuit. When no voltage is applied, the diode blocks the current and prevents it from flowing. This allows the switch to turn on and off, depending on the voltage applied.

The MRA4003T3 can also be used in synchronous rectification. In this application, it is used to rectify alternating current. When an AC voltage is applied, the diode will conduct current in one direction during the positive half cycle and block current during the negative cycle. This allows for efficient conversion of AC to DC power.

The MRA4003T3 can also be used for general rectification and for freewheeling protection. When a positive voltage is applied, it will conduct current in the forward direction and when a negative voltage is applied, it will block current. This can be used to regulate power to different circuits in a circuit board. It is also used for protection against inductive kickback, ensuring that current doesn’t flow back into the circuit and overload components.

In conclusion, the MRA4003T3 is a single rectifier diode that is commonly used in switching power supplies, AC-DC conversion, and freewheeling protection. It has a low forward voltage drop, a high breakdown voltage, and a low thermal resistance, making it suitable for a wide range of applications.

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