The SM8 Series from Bourns are Precision Wirewound Resistors. They have a resistance ranging from 1 ohm to 500 kilo-ohms and a resistance tolerance of ±0.005 % to ±1 %. These resistors have a power rating of up to 0.3 W. They have a temperature coefficient of up to ±2 PPM/°C and can operate over a temperature range of -55°C to +145°C. These RoHS-compliant non-inductive multi-Pi core resistors offer long-term stability of 100 ppm/year and have matched resistance sets to ±0.001 % and ±0.5 ppm/°C. They are available in surface-mount packages.