Specifications: The APV278G1EH is a very high-voltage, medium-current Silicon Carbide (SiC) PhotoMOS SSR in an SMD-5 package. It is a 1 Form A (SPST-NO) relay capable of switching up to 1800V AC/DC with a 450mA current rating. It features a relatively low 1.8Ω on-state resistance (for its voltage), provides 5000Vrms isolation, and switches with 750μs (on) and 50μs (off) times. It operates from -40°C to 85℃ and is controlled by 1.33-1.5VDC. Application Scenarios: Targeting specialized applications requiring high voltage, medium current, and SiC reliability in a compact SMD package. Ideal for advanced medical imaging (CT, PET), industrial high-power RF amplifiers, particle accelerator subsystems, high-voltage pulse generators, and next-generation power conversion systems in aerospace and defense.