Providing reinforced insulation power supply compatible with MAXIM™ MAX253 to power RS-485/RS-232 transceivers, PH9185 series operates in fixed duty cycle push-pull topology that delivers up to 3 W from low-voltage source and working voltage up to 4,000 V with 5,000 V isolation and 8 mm creepage. Products meet standard EIA481 requirements and may be used in industrial control systems, building automation, smart grid, surveillance, automotive, renewable energy, and aeronautics applications.