LRMAP3920 Metal Alloy Power Resistors IRC / TT Electronics LRMAP3920 Low Resistance Metal Alloy Power Resistors feature a 0.2mΩ to 2mΩ resistance range and high power up to 5W. LRMAP3920 resistors provide excellent long-term stability and current sensing for power electronics. These IRC / TT Electronics devices are AEC-Q200 qualified.