The GDH4048ZD3 is a single-phase solid-state relay (SSR) from Greegoo's GDH series, designed for a 40A load current and 480V AC output, with a control voltage range of 4-32V DC. It utilizes SCR output for reliable AC switching, featuring 2500Vrms optical isolation, zero-voltage or random switching options, and LED status indication. Engineered for efficient power control, it offers low power consumption and a long operational lifespan.