While ISA, ISE, ISH, and ISK series offer unregulated outputs, ISR and ISW have regulated outputs. ISE and ISA ranges provide 1 W output power with respective single and dual unregulated outputs, and ISH is 2 W version of ISE range. ISK offers 0.25 W single output, ISW is 1 W single-output converter, and ISR range provides 3 W single output. Accordingly there are various combinations of single-output models from 3.3–24 Vdc and dual-output models with outputs of ±5, ±9, ±12, ±15, and ±24 Vdc.