ASSR-601J-000E is a high-voltage solid-state relay that is designed for high-voltage industrial applications. It consists of an AlGaAs infrared light-emitting diode (LED) input stage optically coupled to a high-voltage output detector circuit. The detector consists of a high-speed photovoltaic diode array and driver circuitry to switch on/off two discrete high-voltage MOSFETs. The relay turns on (contact closes) with a minimum input current of 10mA through the input LED. The relay turns off (contact opens) with an input voltage of 0.4V or less. This solid-state relay provides reinforced insulation and reliability that delivers safe signal isolation critical in automotive and high-temperature industrial applications. It is used in applications such as battery/motor/solar panel insulation resistance measurement/leakage detection, BMS flying capacitor topology for sensing batteries, electro-mechanical relay replacement, and inrush current limiter protection.