5x NTV0505MC 3kVDC Isolated 1W Dual Output SM DC-DC Converters https://www.murata.com/en-eu/products/productdetail?partno=NTV0505MC
4x RBM-0505D Recom RBM DC/DC-Wandler 1W 5 V dc IN, ±5V dc OUT / ±100mA 3kV dc isoliert https://de.rs-online.com/web/p/dcdc-wandler/4943787
Stück 2 Euro
Alles unbenutzt, OVP, von Farnell/RS.