Metal Film SMD Resistor

Metal Film SMD Resistor Production name MELF Resistor Rated power 0.25W-2W Resistance value 1R 10M Resistance tolerance ±0.1%,±0.25%,±0.5%,±1%,±5% Features 1.Low temperature coefficient ,high precision,good high frequency performance. 2.Operating ambient temperature:-55°C +155°C 3.Film the metal in Vacuum,the surface coats blue resin with the good waterproof. performanceTest item Test condition performance Temperature coefficient Test the resistance value at normal temperature and normal temperature added 100°C,calculate per °C resistance value change rate ±5 50ppm/°C Short time overload 2.5 x rated voltage or max.overload voltage(get the lower) for 5 seconds R≤ ±(0.5%+0.05Ω) Pulse overload At 4 x rated voltage or Max. Pulse overload voltage(get the lower)cycle 10000±200 times (1 second on,25 seconds off). R≤±(1%+0.05Ω) Resistance to solderling heat Immerge into the 350±10°C tin stove for 2 3seconds R≤ ±(0.5%+0.05Ω) Solderability Immerge into the 245±3°C tin stove for 2 3seconds The solderling area is over 95% Temperature cycling At -55°C for 30min,then at +25°C for 10-15min,then at +155°C for 30min,then at +25°C for 10-15min,total 5cycles R≤ ±(0.5%+0.05Ω) Load life in humidity Overload rated voltage or Max.working voltage(get the lower )for 1000 hours(1.5hours on and half-hour off)at the 40±2°C and 90 95% relative humidity R≤ ±(2%+0.05Ω) Load life in heat Overload rated voltage or Max.working voltage(get the lower )for 1000 hours(1.5hours on and half-hour off)at the 70±2°C. R≤ ±(2%+0.05Ω) Note More details,please feel free to contact us.