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How to choose the right heatsink ?

April 26, 2017heatsink right

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How to choose the right heatsink ?

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5) Mounting without heatsink or mounting on back plate of cabinet A curve without heatsink is given for the SO/SC or SG type of solid state relays. When mounted on the back plate of a cabinet, the relay/plate contact must be correct. An aluminium back plate of 150mm x 150mm x 3 mm corresponds to approximately 4°/W An aluminium back plate of 300mm x 300mm x 3 mm corresponds to approximately 2°/W In all cases, it is recommended to perform a test and measure the heat dissipation. A steel plate will have greater thermal resistance.