CMA2490

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Solid State Relays (SSRs) are an integral part of industrial automation applications. They enable the reliable switching of DC loads at high power levels without relying on mechanical contactors or physical relays. The CMA2490 is a powerful SSR offering a DC input voltage range of 24-90V, with a current rating of up to 20A. This SSR is designed with an isolation voltage of 6 kV and with a wide operating temperature range from -40 to +85°C, making it ideal for harsh environments.

One of the most important advantages of the CMA2490 is its low on-resistance of 0.35 mΩ. This feature helps to reduce power dissipation when the SSR is in use, resulting in less heat when the unit is in operation. The device also features a high isolation voltage of 6 kV as well as a high surge current of 60A.

CMA2490 SSRs can be used in a variety of applications in both industrial and consumer markets. In the industrial market, the CMA2490 is commonly used to switch DC loads in automated industrial processes. The SSR’s low on-resistance allows it to reliably switch high-power DC loads without requiring the higher power dissipation of mechanical contactors or physical relays. It can also be used in hot-swapping operations, allowing for safe, reliable switching between DC loads.

In the consumer market, the CMA2490 is often used to switch DC loads in lighting systems, home automation, audio systems, and DC motor control systems. It can be used to safely switch high-powered DC loads with no mechanical contact, protecting against shock hazards from exposed metal contacts. The SSR’s 6 kV isolation voltage allows it to be used in environments where high voltages may exist.

The CMA2490 works on a very simple principle. When the DC input voltage is present, it flows through the MOSFETs inside the SSR, producing a small current. This current is converted to a voltage by the EVU, which is then applied to the TRIACs inside the SSR. This voltage causes the TRIACs to turn on, allowing high current to flow through the attached load.

When the input voltage is removed, the TRIACs remain off, preventing any current from flowing through the attached load. This is an important feature for applications where safety is a primary concern, as it helps to prevent electrocution or other hazardous conditions due to exposed metal contacts.

In summary, the CMA2490 is a powerful SSR with a wide range of potential applications in both industrial and consumer markets. Its low on-resistance helps to reduce power dissipation while its high isolation voltage enables it to be used in environments where high voltages may exist. Its simple switching principle makes it easy to understand and use, making it a valuable tool for reliable and safe switching of high-powered DC loads.

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