Santo Angelo is a Brazilian manufacturer of cables, connectors, and audio accessories based in Guarulhos, São Paulo. The brand is the musical-instrument arm of SMA Cabos e Sistemas Ltda., a cable and connector manufacturer founded in 1979. Its catalog spans instrument and microphone cables, XLR and speaker cables, direct boxes, pedalboards, power conditioners, wireless systems, and microphones, with distribution across Brazil and exports to international markets through retailers like Reverb and Amazon.

The company is best known in Brazil for its assembled instrument cables, including the Kill Switch line, which integrates an on-cable mute switch aimed at guitarists and bassists. Santo Angelo also produces a range of signature cables developed with Brazilian players and markets its products as being assembled in-house at its Guarulhos facility.

The brand has an active endorsement program with Brazilian musicians, including guitarists Marcelo Barbosa, Nelson Faria, and Andre Nieri, as well as rock vocalist Frejat.

Santo Angelo has 10 products cataloged on Equipboard, including Instrument Cables, Dynamic Microphones, and Miscellaneous Guitar Parts. Their gear is featured by 2 artists, with the strongest followings in Rock, Jazz, and Latin. Notable users include Rafael "Rafa" Barbosa and André Nieri.