I'm using 3 MOSFETS in a circuit due to the large currents flowing through these MOSFETS. I want to use one big single heatsink for all instead of 3 separate heat sinks. This is because at one time only one MOSFET is conducting. I believe that this will reduce the overall heatsink size and reduce temperature cycling .
Is there any problem using this type of heat sink? Can any one please share some links related to this type of heatsink.