The RA4890HA12 is an industrial solid state relay designed for zero switching operation with antiparallel thyristor output, rated for 90 AACrms at 480 VACrms operational voltage. It features a blocking voltage of 1200 Vp, control voltage range of 90 to 280 VAC/DC, and direct copper bonding technology for enhanced thermal performance. The relay incorporates OPTO isolation (input-output) rated at 4000 VACrms, an on-state voltage drop of 1.6 Vrms at rated current, and a thermal resistance (junction to case) of 0.3 K/W. Operating temperature range is -20 to +70°C with a maximum junction temperature of 125°C, and it is suitable for resistive, inductive, and capacitive loads in industrial applications requiring high current switching with minimal heat generation.