概要PPTC由高分子有机聚合物搀加导电的碳黑粒子组成。PPTC正常温度下为低阻抗，当有过电流通过或环境温度高于动作温度时，其内部导电链断开，阻抗迅速上升，呈高阻抗状态；当过电流消失或温度降低后，导电链再度结合，***为低阻抗。应用时表现为通过高阻限流作用，对***性的电流过载冲击进行***。产品特点:***D结构适合高密度安装l动作时间短l良好的焊接性能应用:USB、HDMI、IEEE1394接口保护l锂电池、电池组及可充电电池保护l液晶电视、电脑、***等消费类电子设备l通讯、安防及工控行业***D1812PartNumberIhold(A)Itrip(A)Vmax(Vdc)Imax(A)Pdmax.(W)MaximumTimeToTripResistanceAgencyApprovalCurrent(A)Time(Sec.)Rmin(Ω)R1max(Ω)***D1812P010TF0.10.3301000.80.51.51.615√√***D1812P014TF0.140.3460100.81.50.151.56√√***D1812P020TF0.20.4301000.880.020.85√√***D1812P020TF-J0.20.460400.8121.44.4√√***D1812P035TF/300.350.7530400.880.150.41.7√√***D1812P050TF0.51151000.880.150.151√√***D1812P050TF/300.51301000.880.150.151√√***D1812P075TF0.751.513.21000.880.20.10.45√√***D1812P075TF/240.751.5241000.880.20.110.29√√***D1812P075TF/330.751.533200.880.20.110.4√√***D1812P110TF1.12.281000.880.30.040.21√√***D1812P110TF/161.11.95161000.880.30.060.18√√***D1812P110TF/241.11.9524200.880.50.060.2√√***D1812P110TF/331.11.9533200.880.50.060.2√√***D1812P125TF/161.252.5161000.880.40.050.14√√***D1812P125TF/6,4L1.252.561000.880.40.050.14√√***D1812P150TF/81.5381000.880.30.040.11√√***D1812P150TF/241.5324200.881.50.040.12√√***D1812P150TF/121.53121000.880.50.040.11√√***D1812P150TF/161.52.8161000.880.50.040.11√√***D1812P160TF/8(4L)1.62.881000.8810.030.1√√***D1812P160TF/161.62.8161000.880.50.030.1√√***D1812P200TFT23.581000.8820.020.07√√***D1812P260TFT2.65.081000.88.002.500.0150.047√√***D1812P200TF/1223.5121001820.020.07√√***D1812P200TF/1623.5161001820.020.07√√***D1812P260TF/122.65.0121000.88.005.000.0150.055√√***D1812P260TF/162.65.0161001.28.005.000.0150.050√√***D1812P300TFT3.005.061000.88.004.000.0120.040√√)