Ceramic Resistor 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.

Ceramic resistor heat sink.

The aluminum cased types are designed to be attached to a heat sink to dissipate the heat. Headquarters 27501 bella vista parkway warrenville il 60555 usa 1 866 9 ohmite 1 866 964 6483. Nowadays the resistance wire itself may be replaced by a moulded spiral of metal oxide compound. However even this description is out of date.

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. 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. Ohmite now carries a line of heatsink solutions that are specifically designed for your bga and pbga applications. They are most often wire wound resistors.

It is a nickname for the heat resistant ceramic case in which a coil of resistance wire is potted. Large wirewound resistors may be rated for 1 000 watts or more. Ohmite s heatsinks provide a low cost thermal solution for these specific packages in multiple sizes.