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阻值及阻值误差

Resistance and Resistance tolerance

阻值允许误差

Resistance tolerance

±5% (J)

阻值将根据如下表格中所施加的电压值后进行测量。Resistance shall be measured using the applied voltage values of the following table.

温度系数

Temperature coefficient

±300ppm

在常温及常温+100℃时分别测量电阻并计算每度的阻值变化率。Test the resistance value at normal temperature and normal temperature added 100℃,calculate per℃ resistance value change rate .

额定功率

Power rating load

△R/R≦± (1%＋0.05Ω)

表面温升(temperature) 350℃Max.

在受试电阻上加30分钟的额定电压the power rating is applied to the resistor kept horizontally for 30 min.

短时间过负荷

Short-time overload

△R/R≦± (2%+0.05Ω)

10倍额定电压测试5秒。At 10× rated voltage for 5 seconds.

绝缘阻值

Insulation resistance

≥100MΩ

DC500V

绝缘电压

Dielectric withstanding voltage

无火花、烧损或绝缘破坏等异常现象。

Without damage by

flash-over, fire. or

breakdown, etc.

≥AC2000V，60秒（sec.）

端子强度

Terminal strength

无机械损伤

no evidence of mechanical damage

张力(Pull)：196N ， 30± 5 秒seconds

电阻体强度

Resistor strength

无机械损伤

no evidence of mechanical damage

294N，30± 5秒seconds

特性

Characteristics

规格值

Standards

测试方法

Test methods

耐热性

Heat resistance

△R/R≦± (1%+0.05Ω)

在375±10℃锡炉中浸2~3秒

Immerge into 375±10℃ tin stove for 2~3 seconds.

热冲击

Thermal shock

△R/R≦± (2%+0.05Ω)

-55℃/30分钟（min.）→+25℃/15分钟（min.）→+125℃/30分钟（min.）→+2515分钟（min.

共5个循环 total 5 cycles.

耐温负荷寿命

Power rating load

△R/R≦± (5%+0.05Ω)

在温度为40±2℃，相对湿度为90~95%的恒温恒湿箱中，施加额定电压或比较大工作电压（取较小者）共1000小时（通1.5小时，断0.5小时）。Overload rated voltage or Max.working voltage (get the lower) for 1000 hours (1.5 hours on and half-hour off ) at the 40±2℃ and 90~95% relative humidity.

耐温负荷寿命

Load life in heat

△R/R≦± (5%+0.05Ω)

在70±2℃恒温恒湿箱中施加额定电压或比较大工作电压（取较小者）1000小时（通1.5小时，断0.5小时）。Overload rated voltage or Max.working voltage (get the lower ) for 1000 hours (1.5 hours on and half-hour off) at the 70±2℃.