STTH2R02AY 200V, 2A Automotive Ultrafast Diode STMicroelectronics STTH2R02AY 200V, 2A Automotive Ultrafast Diode is based on ST's 200V planar Pt doping technology. The Pt technology allows the STTH2R02AY to achieve excellent VF/QRR performances, especially in a high-temperature environment.