One of several protein complexes involved in nucleotide-excision repair; possesses endodeoxynuclease and DNA helicase activities. In S. cerevisiae, it is composed of Rad2p and the core TFIIH-Ssl2p complex (Core TFIIH is composed of Rad3p, Tfb1p, Tfb2p, Ssl1p, and Tfb4p. Note that Ssl2p is also called Rad25p).