Specifications: The APV278AEH is the surface-mount SMD-5 version of the SiC ultra-high-voltage PhotoMOS SSR. It shares the 30mA, 1800V rating, 88Ω on-resistance, 5000Vrms isolation, and 80μs/50μs switching. It operates from -40°C to 85°C with 1.33-1.5VDC control. Application Scenarios: Brings SiC performance to automated, high-density PCB assembly. Critical for cutting-edge, compact medical systems (portable X-ray, advanced diagnostics), aerospace and defense electronics, and high-power-density RF and pulse power modules where SiC reliability and extreme voltage are needed in a minimal footprint.