PTC自恢复保险丝.doc

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1、PTC自恢复保险丝====================================================================================工作原理WH自恢复保险丝串联在电路中，正常情况下呈低阻状态，当电路发生短路或串入异常大电流时，WH自恢复保险丝在短时间内变成高阻状态，从而对电路起到保护作用，当异常消除后，又自动恢复成低阻状态，无需认为更换或维修。应用范围*电器设备：电源、镇流器、充电器、家电等*电子产品：计算机及外围、汽车电子等*通讯设备：交换机、电话、GPS等*工控系统：变压器、马达、微电机等型号说

2、明Ih:WHPTC元件在25℃环境下的最大的工作电流Rmin:WHPTC元件工作前的初始最小阻值It:WHPTC元件在25℃环境下启动保护的最小电流Rmax:WHPTC元件的未工作前的初始最小阻值Vmaxi:WHPTC元件在阻断状态下所承受的最大电压Vmax:WHPTC元件的最大工作电压Pdmax:WHPTC元件工作状态下的消耗功率Imax:WHPTC能承受最大电流选型注意*根据环境温度及折减比计算正常工作电流Ih,Ih=电路平均工作电路/折减比*据计算出的Ih及设备线路上的最大工作电压，选择WH自恢复保险丝WHPTC自恢复保险丝规格表（25℃）型号I

3、hItVmaxVmaxiImaxPdmaxRminRmax外形尺寸(mm)AAVVAWΩΩ圆形ABCWH600-1100.110.226060037.014.0Fg414.014.05.1WH600-1500.150.306060036.012.0Fg414.014.05.1WH600-1600.160.326060034.010.0Fg414.014.05.1WH250-0800.080.1660250314.022.0Fg26.09.35.1WH250-0900.090.1860250310.020.0Fg26.09.35.1WH250-1100.

4、110.226025036.012.0Fg47.010.05.1WH250-1200.120.246025036.510.5Fg47.010.05.1WH250-120D0.120.246025036.010.0Fg65.55.55.1WH250-1450.1450.296025033.56.5Fg47.010.05.1WH250-1800.180.3660250101.03.0Fg410.414.55.1WH250-2000.200.4060250103.06.0Fg410.414.55.1WH250-4000.400.8060250101.03.0

5、Fg410.414.55.1WH250-6000.601.2060250100.62.0Fg416.018.05.1WH250-8000.801.6060250100.41.0Fg422.022.05.1WH90-1500.150.309020202.44.0Fg57.47.45.1WH90-2000.200.409020201.02.5Fg57.47.45.1WH90-2500.250.509020200.82.0Fg57.67.65.1WH90-3500.350.709020200.61.2Fg57.97.95.1WH90-5500.551.109

6、020200.450.9Fg510.910.95.1WH90-7500.751.509020200.200.75Fg511.711.75.1WH90-9000.901.806020200.100.50Fg513.013.05.1WH60-0100.100.2060400.384.007.50Fg27.412.75.1WH60-0170.170.3460400.483.305.20Fg27.412.75.1WH60-0200.200.4060400.411.833.10Fg27.412.75.1WH60-0250.250.5060400.451.252.

7、05Fg27.412.75.1WH60-0300.300.6060400.490.881.40Fg27.413.05.1WH60-0400.400.8060400.560.551.40Fg17.613.55.1WH60-0500.501.0060400.770.500.82Fg17.913.75.1WH60-0650.651.3060400.880.310.52Fg19.714.55.1PTC自恢复保险丝型号IhItVmaxVmaxiImaxPdmaxRminRmax外形尺寸(mm)AAVVAWΩΩ圆形ABCWH60-0750.751.5060400.

8、920.250.45Fg110.415.25.1WH60-0900.901.8060400.9