84137911

Series:	GNA5
Packaging:	Bulk
Part Status:	Active
Mounting Type:	Chassis Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC
Voltage - Input:	90 ~ 280VAC
Voltage - Load:	24V ~ 280V
Load Current:	25A
Termination Style:	Screw Terminal
Package / Case:	Hockey Puck
Supplier Device Package:	--

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Introduction

Solid State Relays (SSRs) are electronic switches designed to be used where electrical and/or optical isolation is required in order to control the power of an electrical circuit. They are able to switch between open or closed states at a predetermined set point and the output from the relay is either set for ON or OFF state. While the majority of SSRs provide an ON/OFF type of switching, some versions are available that offer adjustable current ranges, timing features for delayed activation and other more specific functions. SSRs are commonly used in a variety of applications and can be used for manual or remote control of high power devices.

Application Fields of 84137911 SSRs

SSRs can be found in many different applications and can be used to provide an efficient method of controlling and providing power to various devices. Common application fields for SSRs includes process control, temperature control, alarm systems, motor control and automation systems.

• Process control: SSRs are used in many process control applications due to their ability to quickly switch between ON/OFF states. Process control applications may include controlling pumps, motors, fans, valves, compressors and many other process related items.
• Temperature control: In addition to process control, SSRs can be used in temperature control applications. SSRs are usually used to switch on/off heating elements and other temperature control components, such as resistors or actuators. Temperature-sensitive SSRs are also available that can be used to switch on/off the heating elements when a certain temperature is reached.
• Alarm systems: SSRs can also be used in alarm systems where they are used to switch on/off alarm systems such as sprinklers, fire alarms, smoke detectors and other security equipment.
• Motor control: SSRs can be used to switch on/off motors and other large power consuming devices, such as air conditioning units, fans, pumps, printing presses and other high-power equipment.
• Automation systems: SSRs can be used in a wide variety of automation systems due to the fact that they can be used to switch on/off electrical circuits in a repeatable and almost instantaneous manner.

Working Principle of 84137911 SSRs

The basic working principle of SSRs is quite simple – they use an electronic switch to control the power of an electrical circuit. This switch is usually a thyristor, triac, or an opto-isolator.Thyristors are the most commonly used electronic switches for SSRs. A thyristor is a four-layer semiconductor device that is designed to switch on when a predetermined voltage level is exceeded. When the voltage is no longer present, then the device switches off. Thyristors have a relatively low on state resistance and are fast to switch on and off.Triacs are another type of electronic switch that can be used in SSRs. Triacs are composed of two thyristors operating in reverse mode and can be used to control the power to large AC devices.Opto-isolators are optically isolated components used in SSRs that provide electrical isolation, while still offering the convenience of switching. Opto-isolated SSRs provide the same level of electrical isolation as standard optical isolators but offer the convenience of switching with an electrical signal.

Conclusion

The 84137911 SSR is a versatile and self-contained electronic switch designed to be used where electrical and/or optical isolation is required. The switch consists of a thyristor, triac, or an opto-isolator and can provide an efficient method of controlling and providing power to various devices in a wide range of applications, including process control, temperature control, alarm systems, motor control and automation systems.

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