They are specifically suited for high endurance applications because they are better at surge and overload handling, higher voltage and power rating and are also more stable at higher temperatures. However, metal oxide resistors are not very good in low resistance and tolerance applications. These resistors also have a higher temperature coefficient of resistance than metal and carbon film resistors.

Tin oxide mixed with antimony oxide is the most popular material used in these resistors. The resistance value depends on the amount of oxide material, the thickness of the metal oxide coated and also the dimensions (length and width) of the metal-oxide film cut. The oxide films are cut accurately using laser beams.

Manufacture of metal oxide resistors are more complicated than either carbon or metal film resistors.

Metal oxide resistors find application in:

• Telecommunication
• Medical Equipment

KWK has a partnership with KRAH group, Germany and the Widap Group, Switzerland who are market leaders in the automotive and industry segment respectively.

KWK offers resistors with diverse construction and mounting options to suit customer specific requirements.

All our products are ROHS (Restriction of the Use of certain Hazardous Substances in Electrical and Electronic Equipment) compliant.