Ceramic Resistor Heat Sink
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Ohmite now carries a line of heatsink solutions that are specifically designed for your bga and pbga applications.
Ceramic resistor heat sink. Simple metal heat sinks. Additionally you may want to ensure that the resistor is mounted with an air gap below it as well not touching the pcb to promote air circulation on all sides. Large wirewound resistors may be rated for 1 000 watts or more. Nowadays the resistance wire itself may be replaced by a moulded spiral of metal oxide compound.
The aluminum cased types are designed to be attached to a heat sink to dissipate the heat. They are most often wire wound resistors. However even this description is out of date. Headquarters 27501 bella vista parkway warrenville il 60555 usa 1 866 9 ohmite 1 866 964 6483.
The rated power is dependent on being used with a suitable heat sink e g a 50 w power rated resistor overheats at a fraction of the power dissipation if not used with a heat sink. A surface mount power resistor with a pad for heatsink may require a copper pour heatsink or a physical heat sink of some kind attached see the datasheet for the component in question. It is a nickname for the heat resistant ceramic case in which a coil of resistance wire is potted.