Ceramic Resistor Heat Sink

Ohmite now carries a line of heatsink solutions that are specifically designed for your bga and pbga applications.

Ceramic resistor heat sink.

It is a nickname for the heat resistant ceramic case in which a coil of resistance wire is potted. The aluminum cased types are designed to be attached to a heat sink to dissipate the heat. 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. Headquarters 27501 bella vista parkway warrenville il 60555 usa 1 866 9 ohmite 1 866 964 6483.

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. Simple metal heat sinks. 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.

Ohmite s heatsinks provide a low cost thermal solution for these specific packages in multiple sizes. Nowadays the resistance wire itself may be replaced by a moulded spiral of metal oxide compound. When a resistor is attached directly to the heat sink the heat generated by the resistor conducts to the metal plate and then into the air as a result of convection.