TISP4145M3AJR-S

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Thyristors are electronic components made from a three-layer semiconductor material. They are mostly used in industrial and commercial applications, such as motor controls, dimmers, motor starters, and lighting controls. The TISP4145M3AJR-S is a four-pin Silicon Triac Thyristor (alternatively known as a Light Activated SCR or LASCR). The device is designed to provide an efficient system protection in demanding AC applications, especially those susceptible to the generation of over-voltages from inductive transients.

TISP4145M3AJR-S Application Field

The TISP4145M3AJR-S is typically used in motor control circuits and other circuit applications that require high current control. It is suitable for such applications as critical load protection, remote control, power switching, thermal overload protection, lighting control, and AC dimming. It can also be used in automotive and industrial electronics where a reliable load control circuit is needed.

Working Principle

The TISP4145M3AJR-S works by providing a gate drive to a Silicon Triac. The Triac is a three-terminal switch capable of controlling AC current in both directions. The base terminal of the Triac is connected to the gate pin of the device and is used to turn the Triac on and off. The device uses a SCR-triggered gate drive to turn the Triac on and off and will control the current flow across its two main junctions. This is done by sensing the voltage on the gate terminal and applying a voltage to the gate. The Triac will turn on when a certain voltage is applied to its gate and will remain on until the current drops or when the gate voltage is removed.

The device can be used in a variety of applications with different voltage and current ratings. The peak repetitive off-state voltage rating is between 400V to 750V, depending on the application, while the holding current is typically between 1mA to 3.5mA. The device is also highly resistant to surge current, with peak current ratings of up to 1200A.

The TISP4145M3AJR-S also features built-in thermal protection, which ensures the device is not damaged during normal operation. This protection works by monitoring the junction temperature of the device and cutting off the power supply to the device at a certain temperature. This helps prevent possible damage to the device due to excessive heat.

Conclusion

The TISP4145M3AJR-S is a four-pin Silicon Triac Thyristor designed for use in AC applications that require high current control. It has a peak repetitive off-state voltage rating of 400V to 750V and a holding current of 1mA to 3.5mA, making it suitable for use in various AC circuits. The device also features built-in thermal protection which helps prevent over-heating and damage to the device.

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