Tepro specializes in a wide range of resistors, including wirewound, metal film, carbon film, and network resistors. Known for manufacturing precision and power resistors for military and commercial use, Tepro's history dates back to 1959. They gained a reputation for producing resistors with tight tolerances. In 1980, Tepro was acquired by Electro Technik Industries, Inc., which expanded their capabilities. They later diversified into metal film and network resistors adding carbon film resistors.

Isotek is a wholly owned subsidiary of Isabellenhütte Heusler GmbH KG, located in Dillenburg, Germany. Formed in 1989, Isotek is a leading supplier of precision current sensing and high power resistors, thermo electric and resistance alloys, and precision measurement systems. Located in Swansea MA, Isotek has developed an industry wide reputation for providing high quality products and unparalleled customer support. Backed by hundreds of decades of manufacturing and engineering expertise and a representative network that spans all of North America, Mexico and Brazil our mission is to provide superior resistive solutions into the automotive, industrial and aerospace industries.

A leading manufacturer of low ohmic resistors using power metal strip technology. Resistors as low as 100 micro ohms with power rating to 6,000 watts.

RCD offers one of the widest ranges of passive components! Worldwide mfg ensures lowest price from smallest to highest volume. 2billion piece inventory assures immed. delivery on all std resis, caps & inductors. RCD’s unique SWIFT™ dept can mfr almost any non-stk passive component within a few days (Mil-spec items & custom networks in 2wks) ~All resistive technologies: thin& thick film, wirewound, foil, composition. Ultra-precision & Hi-Rel to .001% 0.25ppm. Power resis to 1300W, 300KV, 150Kjoules. Hi-volt, surge, jumpers, fusible, microwave & temp-sensitive. 5W–300W heat sink, ceramic & steel substrate planar resistors. Thick & thin film arrays, networks, hybrids, IPC’s. Shunts to 15KA ~Capacitors, ceramic & tantalum,6.3V-30KV ~Inductors&Transformers ~ Delay Lines, Active/Passiv