📄 电子基础电阻.htm
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<P align=center><A
href="http://league.ysu.edu.cn/wuxie/dzjc/dz.asp#top">返回顶部</A></P>
<P class=style1>2． 主要性能指标<A name=2></A></P>
<P><SPAN
style="COLOR: green; FONT-FAMILY: 宋体; Times: ">额定功率</SPAN><SPAN>：在规定的环境温度和湿度下，假定周围空气不流通，在长期连续负载而不损坏或基本不改变性能的情况下，电阻器上允许消耗的最大功率。为保证安全使用，一般选其额定功率比它在电路中消耗的功率高</SPAN><SPAN>1-2</SPAN><SPAN>倍。额定功率分</SPAN><SPAN>19</SPAN><SPAN
style="FONT-FAMILY: 宋体">个等级，常用的有</SPAN><SPAN>0.05W</SPAN><SPAN>、</SPAN><SPAN>0.125W</SPAN><SPAN>、</SPAN><SPAN>0.25
W</SPAN><SPAN>、</SPAN><SPAN>0.5 W</SPAN><SPAN>、</SPAN><SPAN>1
W</SPAN><SPAN>、</SPAN><SPAN>2 W</SPAN><SPAN>、</SPAN><SPAN>3
W</SPAN><SPAN>、</SPAN><SPAN>5 W</SPAN><SPAN>、</SPAN><SPAN>7
W</SPAN><SPAN>、</SPAN><SPAN>10
W</SPAN><SPAN>，在电路图中非线绕电阻器额定功率的符号表示如下图：</SPAN><SPAN> </SPAN></P>
<P><SPAN><IMG height=97 src="电子基础电阻.files/resist7.gif" width=554
align=middle border=0 v:shapes="_x0000_i1031"> </SPAN></P>
<P><SPAN
style="COLOR: green; FONT-FAMILY: 宋体; Times: ">标称阻值</SPAN><SPAN>：产品上标示的阻值，其单位为欧，千欧、兆欧，标称阻值都应符合下表所列数值乘以</SPAN><SPAN>10<SUP>N</SUP></SPAN><SPAN>欧，其中</SPAN><SPAN>N</SPAN><SPAN>为整数。</SPAN><SPAN>
</SPAN></P>
<P><SPAN style="COLOR: fuchsia; FONT-FAMILY: 宋体; Times: ">表</SPAN><SPAN
style="COLOR: fuchsia">2</SPAN><SPAN
style="COLOR: fuchsia; FONT-FAMILY: 宋体; Times: "> 标称阻值系列</SPAN><SPAN
style="COLOR: fuchsia"> </SPAN></P>
<TABLE class=MsoNormalTable borderColor=#ff9900 cellSpacing=0
cellPadding=0 width=497 align=center border=1>
<TBODY>
<TR>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-FAMILY: 楷体_GB2312">允许误差</SPAN><SPAN
style="COLOR: #3366ff"> </SPAN></P></TD>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-FAMILY: 楷体_GB2312">系列代号</SPAN><SPAN
style="COLOR: #3366ff"> </SPAN></P></TD>
<TD vAlign=top width=402>
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-FAMILY: 楷体_GB2312">标称阻值系列</SPAN><SPAN
style="COLOR: #3366ff"> </SPAN></P></TD></TR>
<TR>
<TD vAlign=top width=72 height=34>
<P style="TEXT-ALIGN: center" align=center><SPAN>5% </SPAN></P></TD>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN>E24 </SPAN></P></TD>
<TD vAlign=top width=402>
<P><SPAN>1.0<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><SPAN>1.1</SPAN><SPAN
style="FONT-FAMILY: 宋体"> </SPAN><SPAN>1.2</SPAN><SPAN> </SPAN><SPAN>1.3</SPAN><SPAN> </SPAN><SPAN>1.5</SPAN><SPAN> </SPAN><SPAN>1.6</SPAN><SPAN> </SPAN><SPAN>1.8</SPAN><SPAN> </SPAN><SPAN>2.0</SPAN><SPAN> </SPAN><SPAN>2.2</SPAN><SPAN> </SPAN><SPAN>2.4</SPAN><SPAN> </SPAN><SPAN>2.7</SPAN><SPAN> </SPAN><SPAN>3.0</SPAN><BR><SPAN></SPAN><SPAN>3.3</SPAN><SPAN> </SPAN><SPAN>3.6</SPAN><SPAN> </SPAN><SPAN>3.9</SPAN><SPAN> </SPAN><SPAN>4.3</SPAN><SPAN> </SPAN><SPAN>4.7</SPAN><SPAN> </SPAN><SPAN>5.1</SPAN><SPAN> </SPAN><SPAN>5.6</SPAN><SPAN> </SPAN><SPAN>6.2</SPAN><SPAN> </SPAN><SPAN>6.8</SPAN><SPAN> </SPAN><SPAN>7.5</SPAN><SPAN> </SPAN><SPAN>8.2</SPAN><SPAN> </SPAN><SPAN>9.1</SPAN></P></TD></TR>
<TR>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN>10% </SPAN></P></TD>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN>E12 </SPAN></P></TD>
<TD vAlign=top width=402>
<P><SPAN>1.0</SPAN><SPAN> </SPAN><SPAN>1.2</SPAN><SPAN> </SPAN><SPAN>1.5</SPAN><SPAN> </SPAN><SPAN>1.8</SPAN><SPAN> </SPAN><SPAN>2.2</SPAN><SPAN> </SPAN><SPAN>2.7</SPAN><SPAN> </SPAN><SPAN>3.3</SPAN><SPAN> </SPAN><SPAN>3.9</SPAN><SPAN> </SPAN><SPAN>4.7</SPAN><SPAN> </SPAN><SPAN>5.6</SPAN><SPAN> </SPAN><SPAN>6.8</SPAN><SPAN> </SPAN><SPAN>8.2</SPAN><SPAN> </SPAN></P></TD></TR>
<TR>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN>20% </SPAN></P></TD>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN>E6 </SPAN></P></TD>
<TD vAlign=top width=402>
<P><SPAN>1.0</SPAN><SPAN> </SPAN><SPAN>1.5</SPAN><SPAN> </SPAN><SPAN>2.2</SPAN><SPAN> </SPAN><SPAN>3.3</SPAN><SPAN> </SPAN><SPAN>4.7</SPAN><SPAN> </SPAN><SPAN>6.8
</SPAN></P></TD></TR></TBODY></TABLE>
<P><SPAN
style="COLOR: green; FONT-FAMILY: 宋体; Times: ">允许误差</SPAN><SPAN>：电阻器和电位器实际阻值对于标称阻值的最大允许偏差范围，它表示产品的精度，允许误差的等级如下表所示。</SPAN></P>
<P><SPAN style="COLOR: fuchsia; FONT-FAMILY: 宋体; Times: ">表</SPAN><SPAN
style="COLOR: fuchsia">3</SPAN><SPAN
style="COLOR: fuchsia; FONT-FAMILY: 宋体; Times: "> 允许误差等级</SPAN><SPAN
style="COLOR: fuchsia"> </SPAN></P>
<TABLE class=MsoNormalTable borderColor=#ff9900 cellSpacing=0
cellPadding=0 width=564 align=center border=1>
<TBODY>
<TR>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-FAMILY: 楷体_GB2312">级别</SPAN><SPAN
style="COLOR: #3366ff"> </SPAN></P></TD>
<TD vAlign=top width=73>
<P style="TEXT-ALIGN: center" align=center><SPAN>005 </SPAN></P></TD>
<TD vAlign=top width=75>
<P style="TEXT-ALIGN: center" align=center><SPAN>01 </SPAN></P></TD>
<TD vAlign=top width=85>
<P style="TEXT-ALIGN: center" align=center><SPAN>02 </SPAN></P></TD>
<TD vAlign=top width=74>
<P style="TEXT-ALIGN: center" align=center><SPAN>Ⅰ</SPAN></P></TD>
<TD vAlign=top width=86>
<P style="TEXT-ALIGN: center" align=center><SPAN>Ⅱ</SPAN></P></TD>
<TD vAlign=top width=95>
<P style="TEXT-ALIGN: center" align=center><SPAN>Ⅲ</SPAN></P></TD></TR>
<TR>
<TD vAlign=top width=72>
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-FAMILY: 楷体_GB2312">允许误差</SPAN><SPAN
style="COLOR: #3366ff"> </SPAN></P></TD>
<TD vAlign=top width=73>
<P style="TEXT-ALIGN: center" align=center><SPAN>0.5% </SPAN></P></TD>
<TD vAlign=top width=75>
<P style="TEXT-ALIGN: center" align=center><SPAN>1% </SPAN></P></TD>
<TD vAlign=top width=85>
<P style="TEXT-ALIGN: center" align=center><SPAN>2% </SPAN></P></TD>
<TD vAlign=top width=74>
<P style="TEXT-ALIGN: center" align=center><SPAN>5% </SPAN></P></TD>
<TD vAlign=top width=86>
<P style="TEXT-ALIGN: center" align=center><SPAN>10% </SPAN></P></TD>
<TD vAlign=top width=95>
<P style="TEXT-ALIGN: center" align=center><SPAN>20%
</SPAN></P></TD></TR></TBODY></TABLE>
<P><SPAN
style="COLOR: green; FONT-FAMILY: 宋体; Times: ">标称阻值与误差允许范围的标识方法</SPAN><SPAN
style="COLOR: green"> </SPAN></P>
<P><SPAN style="COLOR: fuchsia; FONT-FAMILY: 宋体; Times: ">表</SPAN><SPAN
style="COLOR: fuchsia">4 </SPAN><SPAN
style="COLOR: fuchsia; FONT-FAMILY: 宋体; Times: ">色环颜色所代表的数字或意义</SPAN><SPAN
style="COLOR: fuchsia"> </SPAN></P>
<TABLE class=MsoNormalTable borderColor=#ff9900 cellSpacing=0
cellPadding=0 width=542 align=center border=1>
<TBODY>
<TR>
<TD vAlign=top width="13%">
<P style="TEXT-ALIGN: center" align=center>色 别</SPAN><SPAN
style="FONT-SIZE: 12pt"> </SPAN></P></TD>
<TD vAlign=top width="20%">
<P style="TEXT-ALIGN: center"
align=center>第一色环<SPAN><BR>最大一位数字</SPAN><SPAN
style="FONT-SIZE: 12pt"> </SPAN></P></TD>
<TD vAlign=top width="19%">
<P style="TEXT-ALIGN: center"
align=center>第二色环<SPAN><BR>第二位数字</SPAN><SPAN
style="FONT-SIZE: 12pt"> </SPAN></P></TD>
<TD vAlign=top width="22%">
<P style="TEXT-ALIGN: center"
align=center>第三色环<SPAN><BR>应乘的数</SPAN><SPAN style="FONT-SIZE: 12pt">
</SPAN></P></TD>
<TD vAlign=top width="26%">
<P style="TEXT-ALIGN: center" align=center>第四色环<SPAN><BR>误
差</SPAN><SPAN style="FONT-SIZE: 12pt"> </SPAN></P></TD></TR>
<TR>
<TD vAlign=top width="13%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: #993300">棕</SPAN></P></TD>
<TD vAlign=top width="20%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">1 </SPAN></P></TD>
<TD vAlign=top width="19%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">1 </SPAN></P></TD>
<TD vAlign=top width="22%">
<P><SPAN style="FONT-SIZE: 12pt; COLOR: black">10 </SPAN></P></TD>
<TD vAlign=top width="26%"> </TD></TR>
<TR>
<TD vAlign=top width="13%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: red">红</SPAN><SPAN
style="FONT-SIZE: 12pt"> </SPAN></P></TD>
<TD vAlign=top width="20%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">2 </SPAN></P></TD>
<TD vAlign=top width="19%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">2 </SPAN></P></TD>
<TD vAlign=top width="22%">
<P><SPAN style="FONT-SIZE: 12pt; COLOR: black">100 </SPAN></P></TD>
<TD vAlign=top width="26%"> </TD></TR>
<TR>
<TD vAlign=top width="13%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: #ff8000">橙</SPAN><SPAN
style="FONT-SIZE: 12pt"> </SPAN></P></TD>
<TD vAlign=top width="20%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">3 </SPAN></P></TD>
<TD vAlign=top width="19%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">3 </SPAN></P></TD>
<TD vAlign=top width="22%">
<P><SPAN style="FONT-SIZE: 12pt; COLOR: black">1000 </SPAN></P></TD>
<TD vAlign=top width="26%"> </TD></TR>
<TR>
<TD vAlign=top width="13%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: yellow">黄</SPAN></P></TD>
<TD vAlign=top width="20%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">4 </SPAN></P></TD>
<TD vAlign=top width="19%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">4 </SPAN></P></TD>
<TD vAlign=top width="22%">
<P><SPAN style="FONT-SIZE: 12pt; COLOR: black">10000 </SPAN></P></TD>
<TD vAlign=top width="26%"> </TD></TR>
<TR>
<TD vAlign=top width="13%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: lime">绿</SPAN><SPAN
style="FONT-SIZE: 12pt"> </SPAN></P></TD>
<TD vAlign=top width="20%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">5 </SPAN></P></TD>
<TD vAlign=top width="19%">
<P style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 12pt; COLOR: black">5 </SPAN></P></TD>
<TD vAlign=top width="22%">
<P><SPAN style="FONT-SIZE: 12pt; COLOR: black">100000 </SPAN></P></TD>
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