172-B-1975

Fixed Composition Resistors (***BEST AVAILABLE COPY***)


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标准号
172-B-1975
发布日期
1975年01月01日
实施日期
1975年01月01日
废止日期
中国标准分类号
/
国际标准分类号
/
发布单位
ECIA - Electronic Components Industry Association
引用标准
24
适用范围
"This standard covers insulated@ fixed resistors having a composition resistance element and capable offull load operation at an ambient temperature of 70?? This standard describes minimum *limits of performance commonly observed in commercially available products@ There are products available with higher levels of performance for some characteristics. CLASSIFICATION Type Designation - The type designation shall be in the following form and as specified in 2.18: Style - The style shall be identified by a three letter symbol ""RRC"" followed by a two-digit number; the letters identify insulated@ composition@ fixed resistors@ and the number identifies the she and power rating of the resistor. See Table II. Resistance - The nominal resistance value expressed in ohms shall be identified by a three-digit number; the first two digits represent significant figures and the last digit specifies the number of zeros to follow. When values less than 10 ohms are required@ the letter ""R"" shall be substituted for one of the significant digits to represent the decimal point."




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