TPSI2072-Q1 2-Channel Isolated Solid State Relay Texas Instruments TPSI2072-Q1 2-Channel Isolated Solid State Relay (SSR) is designed for high-voltage automotive and industrial applications. The TPSI2072-Q1 uses TI’s high-reliability capacitive isolation technology in combination with internal back-to-back MOSFETs to form a completely integrated solution requiring no secondary side power supply. The TPSI2072-Q1 improves system reliability as TI’s capacitive isolation technology does not suffer from mechanical wear-out or photodegradation failure modes common in mechanical relay and photo relay components.