CDLL4903 Encyclopedia Entry

Product Overview

CDLL4903 is a semiconductor device belonging to the category of diode rectifiers. It is commonly used in electronic circuits for its ability to convert alternating current (AC) into direct current (DC). The diode exhibits characteristics such as low forward voltage drop, high surge current capability, and fast switching speed. It is typically packaged in a small, cylindrical form with a glass or plastic encapsulation. The essence of CDLL4903 lies in its efficient conversion of AC to DC, making it an essential component in various electronic devices. Each package contains a specific quantity of diodes, typically ranging from 50 to 100 units.

Specifications

• Forward Voltage Drop: 0.7V
• Maximum Reverse Voltage: 1000V
• Maximum Forward Current: 1A
• Package Type: DO-41
• Quantity per Package: 100 units

Detailed Pin Configuration

The CDLL4903 diode has two pins, an anode, and a cathode. The anode is denoted by a longer lead or a positive sign on the diode body, while the cathode is marked with a shorter lead or a negative sign.

Functional Features

The primary function of CDLL4903 is to allow current flow in one direction while blocking it in the opposite direction. This unidirectional conduction property makes it suitable for rectification purposes in electronic circuits.

Advantages and Disadvantages

Advantages

• Low forward voltage drop reduces power loss.
• High surge current capability ensures reliability in demanding conditions.
• Fast switching speed enables efficient rectification.

Disadvantages

• Limited maximum forward current compared to higher-rated diodes.
• Higher reverse recovery time may impact switching performance in certain applications.

Working Principles

When a positive voltage is applied to the anode and a negative voltage to the cathode, the diode conducts current. Conversely, when the polarity is reversed, the diode blocks the current flow. This behavior allows the diode to convert AC to DC by only allowing the positive half-cycles to pass through.

Detailed Application Field Plans

CDLL4903 finds extensive use in power supply circuits, battery chargers, inverters, and other electronic systems requiring rectification of AC voltage to DC. Its fast switching speed also makes it suitable for high-frequency applications such as switch-mode power supplies.

Detailed and Complete Alternative Models

• 1N4001: Similar specifications with a slightly higher forward voltage drop.
• 1N5408: Higher maximum forward current and reverse voltage ratings.

In conclusion, CDLL4903 serves as a crucial component in electronic circuits, providing efficient rectification and reliable performance in various applications.

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