To achieve the given maximum performance rating of this power resistor, it is designed to be directly mounted on an appropriately matched heatsink and mounted using a thermal compound. 15W Aluminium housed wirewound power resistor, HS Series. 15Watt Aluminium housed power resistors which are manufactured to be compliant with the requirements of a MIL 18546, IEC 115 and are RoHS compliant. Compact size for Power rating Winding construction maximises High Pulse Capability