C155D

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Thyristors - SCRs are semiconductor devices that act as a switch for large currents and power levels. In particular, C155D is an SCR of a specific type. This article explains the application field and detailed working principle of C155D.

Application Field of C155D SCR

C155D is an SCR specially designed for capacitive AC load. It can also be used for controlling inductive AC loads such as motors, transformers and pumps. It is also suitable for both linear and non-linear AC loads such as heaters and lamps. Moreover, C155D can be used in single-phase AC motor speed control systems for controlling the speed of AC motors.

C155D can also be used in single-phase AC power control systems to regulate the power consumed by the load while keeping it at a constant level. It is also used in power switching applications and is often used as a surge protector in power lines.

Working Principle of C155D SCR

SCRs are unidirectional devices that conduct current when a suitable trigger voltage is applied across their anode and cathode terminals. This helps them to act as efficient switches for heavy AC loads.

C155D SCR works on the principle of conduction. It is normally in the off-state and the current flowing through it is zero. When the voltage applied to its anode and cathode terminals exceeds the trigger voltage, the device starts to conduct and hence the current flowing through it increases linearly. This increases the power of the load being controlled.

The reverse blocking of C155D SCR is also very high and hence it can be used for AC power control applications. It is also used as an over-voltage protector as it can withstand high voltages. The turn-off time of C155D SCR is also very low and hence it can be used to control high power-consuming loads without any hassles.

Conclusion

In conclusion, the C155D SCR is a very useful device for controlling AC loads. The application fields and working principle of C155D SCR have been discussed in detail in this article. It is evident that the device is highly useful in controlling heavy AC loads and can be used as an over-voltage protector as well.

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