Wurth Elektronik 177920531, 1-Channel, Isolated, Un-Regulated DC-DC Converter, 0mA 4-Pin, SIP

Simplest design (no transformer design know how required)
Leaded through-hole package for easy manufacturing and prototyping
Stand alone solution (CIN and COUT integrated, no external components)
Simple functional isolation for overvoltage protection, avoiding ground loops, ground shift and noise in signal path or sensor systems
Industrial standard package and pin configuration
Low conducted and radiated EMI (compliant to EN55022 class B)
UL60950 certified