TVS & ESD Protection Semtech TVS (Transient Voltage Suppression) and ESD (Electrostatic Discharge) Suppressors are state-of-the-art devices designed to protect sensitive circuitry from electrical stress. These TVS Diodes and ESD Suppressors safeguard against damage or latch-up caused by Electrostatic Discharge, Electromagnetic Interference (EMI), Electrical Fast Transients (EFT), lightning, Cable Discharge Events (CDE), and other destructive voltage transients.