The AQV258H5A is a PhotoMOS HE 1 Form A surface mount relay designed for industrial applications including battery monitoring systems (BMS), isolation detection, and voltage monitoring. It features a peak AC load voltage rating of 1,500 V with a continuous load current of 20 mA, and supports both AC and DC loads. The device incorporates an LED input with typical operating current of 1.4 mA and maximum of 3.0 mA, combined with a MOS output stage offering on-resistance of 315 O (typical) and turn-on time of 0.35 ms. With an I/O isolation voltage of 5,000 Vrms and operating temperature range of -40°C to +85°C, this relay is ideal for high-voltage isolation and signal control applications requiring reliable switching performance in industrial environments.