常用熔丝、带状熔体和变截面熔体形状如图15-2所示。按其制作材料不同分为铅锑合金熔丝、铅锡合金熔丝、铜熔丝,其技术参数分别见表15-22~表15-24。

图15-2 常用熔丝与熔体形状

表15-22 铅锑合金熔丝技术参数

标称直径(mm)标称截面(mm2)近似英规线号额定电流(A)熔断电流(A)
0.710.40223.06.0
0.810.52213.757.5
0.980.7520510
1.020.8219612

(续表)

标称直径(mm)标称截面(mm2)近似英规线号额定电流(A)熔断电流(A)
1.251.23187.515
1.511.76171020
1.752.41151224
1.983.08141530
2.404.52132040
2.786.07122550
3.147.74103060
3.8111.4094080
4.1213.3384590
4.4415.48750100
4.9118.93660120
5.2421.57470140

表15-23 铅锡合金熔丝技术参数

标称直径(mm)标称截面(mm2)近似英规线号额定电流(A)熔断电流(A)
0.710.40223.35.0
0.8130.52214.16.0
0.9150.66204.87.0
1.221.218710
1.632.1161116
1.832.6151319
2.033.3141522
2.344.3131827
2.655.5122232
2.956.8112637
3.268.4103044

表15-24 铜熔丝技术参数

标称直径(mm)标称截面(mm2)近似英规线号额定电流(A)熔断电流(A)
0.2340.043344.79.4
0.2540.05133510
0.2740.059325.511
0.2950.06831612
0.320.07830714
0.350.0929816
0.380.1128918
0.420.14271122
0.460.16261224
0.510.20251530
0.560.25241734
0.600.28232040
0.700.39222550
0.800.5212958
0.900.6203774
1.000.8194488
1.131.01852104
1.371.51763126
1.602.01680160
1.762.51595190
2.003.014120240