LRMA Low Resistance Metal Alloy Resistors Welwyn / TT Electronics LRMA Low Resistance Metal Alloy Resistors offer metal element construction, good surge performance, and low TCR down to 50ppm/°C. These resistors are halogen free, RoHS compliant, and AEC-Q200 certified for automotive applications. Specific applications for Welwyn / TT Electronics LRMA Low Resistance Metal Alloy Resistors include power supplies, small motor control, medical PSU, and battery chargers.