AQV254H is a PhotoMOS solid-state relay featuring a 1 Form A (normally open) output configuration designed for AC/DC dual-use applications with reinforced insulation. It offers a load voltage rating of 400V (peak AC/DC) and a continuous load current of 150mA (A connection), with a peak load current capability of 0.5A. The device provides 5,000Vrms I/O isolation voltage for enhanced safety in high-voltage applications, housed in a compact DIP6-pin through-hole package with dimensions of 8.8 x 6.4 x 3.9mm. Key input specifications include an LED forward current maximum of 50mA and LED operate current of 3.0mA maximum. Typical applications include measuring instruments, data communication equipment, telephone equipment, and automatic meter reading devices where reliable signal switching with high isolation is required.