Installation
Doc. # 177/52705
Rev. 1.0
approximately 420 mm x 270 mm x 9.5 mm will give approximately the same thermal performance
(0.3°C/W).
In Sevcon’s experience, the thermal resistance of the stand-alone Dragon8 packages and achievable
thermal resistances to ambient using conductive heatsinking are as shown in the table below. These are
given as a guide: actual performance in an application must be verified.
Thermal resistance
without additional
heatsinking (°C/W)
Thermal resistance
achievable with finned
heatsink (°C/W)
Dimension of finned heatsink
(W x L)
Table 1 - Thermal resistance with/without heatsink
Cooling performance is affected by mounting surface flatness and the thermal transfer between mounting
surface and Dragon8. Ensure your application of thermal grease is effective and your mounting surface
meets the flatness figures as described in the ‘Mounting’ section above.
Dragon8– Air Cooling
• Optimum performance will be achieved when mounted in a ventilated location with a minimum of
1m/s airflow.
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