CQ48-25M

CQ48-25M Application Field and Working Principle

The CQ48-25M is a type of thyristor designed to control electric current. Also known as a TRIAC (Triode for Alternating Current), it is a three-terminal semiconductor device that can be used to control either AC or DC current. The CQ48-25M is mainly used in industrial applications or as a switch or regulator in home or office electronics.

The most common applications of TRIACs are for motor speed control, light dimming, and heat control. They are also used as a switch for solid-state relays, motor starters, heaters, dimmers, blowers, AC motor drives, and motion control. Some other applications include computers, audio and video power amplifiers, camera shutters, automotive components, digital thermometers, and medical imaging systems.

The CQ48-25M is a two-terminal thyristor device with a third drift and a fourth gate terminal. It has two turn-on and two turn-off junctions and is designed to be driven by a three-phase power system. The turn-on and turn-off junctions are triggered by the ten electromotive forces (EMFs) provided by the three-phase system. A positive voltage applied to the main gate terminal triggers the turn-on junction and a negative voltage applied to the main gate terminal triggers the turn-off junction.

When the CQ48-25M is in the active conduction state, it is said to be on. When no voltage is applied to either its turn-on or turn-off junction, it remains in its off state. This ability to hold the off state for one or more half cycles is called “Latching”. When the CQ48-25M is turned off, no EMFs are generated by the three-phase system and it remains off until the EMFs from the three-phase system cross its turn-on voltage (DCL) and turn-on junction. When this happens, the CQ48-25M transitions back to its on state.

The CQ48-25M is also used as a switch or regulator to control current flow in a circuit. When a positive voltage is applied to the gate terminal, it turns on the device. This turns on the circuit and current flows through it. If the voltage applied is above a predetermined level (DCL), the CQ48-25M will stay on regardless of the signal from the gate terminal. In this way, it can be used as a switch to control the flow of current without the need for any external components.

The CQ48-25M can also be used as a regulator to control the speed of a motor. By varying the applied voltage, the speed of the motor can be increased or decreased without the need for any external components. In this way, it is possible to control the speed and direction of a motor using the CQ48-25M.

The CQ48-25M is a long-life, low-power thyristor device that is suitable for a wide range of applications. Its ability to provide precise control of current makes it ideal for use in variable speed motor control, lighting and heat control, and other automation applications. When used for motor speed control, its high switching capability allows for smooth and precise operation.

Overall, the CQ48-25M is a highly versatile thyristor device that can be used for a wide range of applications. Its low power and long life make it ideal for industrial, home, and office electronic applications. Its capability to provide precise control and its latching feature make it an excellent choice for applications such as variable speed motor control, lighting and heat control, and other automation applications.

The CQ48-25M is manufactured by several leading semiconductor suppliers, including Novo Electronics and Vishay. All parts are tested and certified to meet the highest standards of quality assurance.