What internal fuses are inside the IRM series? Internally, IRM series has the following AC fuses, which are implemented on AC/L input: IRM-01/02/03 T1A/L300V IRM-05/10/15/20/30 T2A/L300V IRM-45/60 T2.5A/L300V IRM-90 T3.15A/L300V