CT474

Series:	COTOMOS™
Packaging:	Tube
Part Status:	Active
Mounting Type:	Through Hole
Circuit:	SPST-NC (1 Form B)
Output Type:	AC, DC
Voltage - Input:	1.37VDC
Voltage - Load:	0V ~ 400V
Load Current:	90mA
On-State Resistance (Max):	50 Ohms
Termination Style:	PC Pin
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-DIP

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Introduction

The CT474 series of solid state relays (SSRs) are specifically designed for applications that require a high level of reliability and a long life expectancy, such as industrial and commercial automation controls. These SSRs are designed to provide an output of precise control with an enhanced level of protection from electrical disturbances.The CT474 series is capable of operating with very low power dissipation and is suitable for a wide variety of switching applications, ranging from the control of machine tools and robots to the control of home appliances.

Application Field

The CT474 series of SSRs can be used for any applications requiring a reliable electrical control with precise output and a high degree of protection from electrical disturbances. These relays have been widely used in many industries, such as industrial automation, automotive, agriculture and aerospace.Since SSRs are designed to switch either AC or DC voltage, they can be used to switch a wide variety of loads. These include resistive, inductive, and capacitive loads. They can also be used as an on/off switch for air conditioners, pumps, compressors, and other motor driven devices. They are also commonly used to control lighting and HVAC systems.

Working Principle

The CT474 series of SSRs uses a zero-crossing detection circuitry to control its switching operations. When the current passing through the SSR exceeds a pre-determined level, the SSR will trigger a thyristor which will quickly transfer the power from the input terminals to the output terminals, completing the switching operation. This switching process is known as solid state switching.The zero-crossing detection ensures that the power will not be transferred until the voltage across the input and output terminals are at an equal level. This eliminates any potential for arcing or sparking and will effectively minimize the risk of device damage.The CT474 series is also designed with a number of protective features. These include built-in over-current protection, thermal protection, and reverse polarity protection. All of these features are designed to minimize device failure and extend the device’s life expectancy.

Conclusion

The CT474 series of SSRs is an ideal solution for any application requiring a reliable electrical control with precise output and a high degree of protection from electrical disturbances. They are capable of operating with very low power dissipation and can be used for switching a wide variety of loads. These SSRs also offer a number of built-in features designed to minimize device failure and extend the device’s life expectancy.

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