IRC The (International Resistive) TT electronics are industry leaders in resistors, optoelektronic equipment, and semiconductor devices, and are members of AB Electronics, AB Connectors, BI Technologies, IRC, Optek, Semelab and Welwyn Components. Our design engineers collaborate with customers to tackle challenging problems, from invention through comprehensive product design through manufacturing, testing and assembly across the whole product cycle. Our clients receive constant assistance and our engineers are glad to give advice on product and application-related difficulties.