The RFB300-24S28-R5Y from Artesyn Embedded Power is an isolated 300 W board-mount DC-DC converter with 1 output of 16.8 to 29.4 V at 11 A and an 18 to 36 V input.
The RFB300-24S12-R5Y from Artesyn Embedded Power is an isolated DC-DC converter module with 1 output at 7.2 to 13.2 V rated 25 A, accepting an 18 to 36 V input.