ASSR-601JT-500E

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Solid State Relays (SSRs) have been extensively used for years as element-level controls, enabling to bi-directionally transfer electrical signals and power on-demand in a wide range of applications. SSRs are also widely accepted as an energy-saving electronic switch controlled with a low-level voltage, eliminating the need for equivalent mechanical components and operator intervention. In this article, we discuss application field and working principle of one particular Solid State Relay, ASSR-601JT-500E.

ASSR-601JT-500E is a type of zero-crossing optically coupled thyristor Solid State Relay (SSR). It has been designed for applications ranging from motor drive, heating, lighting control, industrial process control, and general switching. This SSR features a short-on-time of about 0.4 seconds, and a wide control voltage range of 3-32V DC, making it suitable for a wider range of microcontroller applications. The total off-state leak currect of this SSR is less than 3mA, ensuring that the switch will not stay on permanently and cause harm to the load or reduced energy efficiency. Additionally, this SSR has trip-off time of about 31ms, making it ideal for applications where fast responses are needed to quickly cut off an overloaded electrical load.

ASSR-601JT-500E\'s working principle revolves around the use of an optically coupled thyristor. This device is designed with an emission LED source and a detector in an isolated housing to prevent contact between them. The purpose of the emission LED is to emit visible and infrared light when it is powered with an AC input voltage through the connected terminals. This high intensity light passes through the optically cavity enclosed by the SSR and is received by the detector. The light then triggers the detector to pass current through the connected load. For zero- crossing applications, as the input voltage passes through the zero volts point, the current drops to zero to ensure instant turning off of the load and preventing from any damage.

Other features in ASSR-601JT-500E include a terminal blocking arrangement type PBT, rated insulation voltage of 500V AC, operating ambient temperature range of -25 to +85 degrees Celsius and a dielectric strength up to 4KV AC. This device is conformally coated and is equally suitable in hostile industrial environments or more benign consumer or commercial applications. It is widely accepted for applications requiring reliable and cost-effective switching solution with low off-state leakage current (2mA maximum) and low on-state resistance (1.45R maximum). Additionally, this device can also be used in a physically compact footprints with a minimal amount of heat generated during operation.

In conclusion, the ASSR-601JT-500E is a type of Solid State Relay which is widely accepted for a wide range of applications. It is designed with an optically coupled thyristor and other key features such as a short on-time of 0.4 seconds, wide control voltage range of 3-32V DC, total off-state leak currect of less than 3mA, and trip-off time of 31ms. This device is conformally coated and is equally suitable in hostile industrial environments or more benign consumer or commercial applications. Therefore it is a cost-effective and reliable switching solution for many applications.

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