●特点Features：1、耐热性好、温度系数小、噪声低、负荷功率大、不燃性；Good heat-durability, low temperature coefficient, low noise, highloadpower,monflammability;2、使用环境温度：-55℃~ 275℃ Operating ambienttemperature:-55℃~ 275℃3、本体表面涂漆颜色为灰白灰，精度色环后增加绿色环表示； Theresistor coats gray white and indicate a green ring at the back of theprecision color ring4、阻值误差在：±0.1%、±0.25%、±0.5%、±1%●额定功率递减图Rated Power Derating Curve： 项目Item性能要求 Performance requirement依据标准 Standard温度系数Temperature coefficient-300ppm/℃≤α≤ 300ppm/℃JIS5202-5.2短时间过负荷Short time overloadΔR≤±（2%R0 0.05Ω）JIS5202-5.5耐焊接热Resistance to soldering heatΔR≤±（1%R0 0.05Ω）JIS5202-6.4可焊性Solderability焊锡面积覆盖95%以上The area of soldering is over 95%JIS5202-6.5耐湿负荷寿命Load life in humidityΔR≤±（5%R0 0.05Ω）JIS5202-7.9耐温负荷寿命Load life in heatΔR≤±（5%R0 0.05Ω）JIS5202-7.10不燃性Nonflammability不可有明显火焰No visible flameSj3272-4.2