30V LEIDITECH
Document overview
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Technical content
A. Features 重要特性重要特性重要特性重要特性 ♦ Smaller size saves board space and cost 超小尺寸、节约空间和成本 ♦ Resettable circuit protection 自恢复保护、免维护 ♦ Fast time-to-trip 动作时间快 ♦ Low resistance 低内阻值 ♦ Lead-free and compliant with the European Union RoHS Directive 2002/95/EC 符合欧州ROHS 无铅环保要求 B. Application 应用范围应用范围应用范围应用范围 Polymer Resettable Fuse for over-current, over-temperature and short-circuit protection 可恢复保险丝用于过流、温度和线路短路保护 Loudspeaker、VCD 、DVD 、Transformers、Automotive electronics、Electronic toys、Motors ♦ IEEE1394 Ports IEEE1394通讯接口 ♦ USB hub, ports and peripherals USB 交换机及外围设备 ♦ Phones 电话设备 ♦ Data communication 数据交换机 ♦ Modems/ Ethernet/LAN 调制解调器/以太网 C. General Description 简要概述简要概述简要概述简要概述 Polymer resettable fuse are made of polymeric PTC materials which is a matrix of 自恢复保险丝是聚合物高分子材料通过特殊工艺而成 ， polymer containing dispersed conductive particles. Generally, the device has a very 高分子粒子按一定的规律排列，正常情况下，自恢复保险丝器件处于低内阻状态， low resistance. If an over-current happened, as a response to the damage current, 当电路中电流突然增大时， the resistance will immediately increase to very high, reducing the current of the 器件将会在短时间内阻值升到高阻状态、高分子膨胀 circuit to a safe value that the loading can carry. Once fault to the circuit is weed out 从而起到减少过电流； and power is recuperated, the polymer will deflate itself , the device will reset and is 一旦故障排除后，高分子将会恢复正常规则排序。 ready for normal operation. 30V Rev : www.leiditech.com 01.06.2015 1/3
D. Product Dimensions（mm ） 产品尺寸产品尺寸产品尺寸产品尺寸(图1为直引线型 图2为弯引线型) Product model A B C D E 引线直径 Max Max Typ Min Max Unit :mm 30V-050 7.4 12.2 5.1 7.6 3.0 0.6+0.05 30V-075 7.4 12.2 5.1 7.6 3.0 0.6+0.05 30V-090 7.4 12.2 5.1 7.6 3.0 0.6+0.05 30V-110 7.4 14.2 5.1 7.6 3.0 0.6+0.05 30V-135 8.9 13.5 5.1 7.6 3.0 0.6+0.05 30V-160 8.9 15.2 5.1 7.6 3.0 0.6+0.05 30V-185 10.2 15.7 5.1 7.6 3.0 0.6+0.05 30V-200 10.2 15.2 5.1 7.6 3.0 0.6+0.05 30V-250 11.4 18.3 5.1 7.6 3.0 0.6+0.05 30V-300 11.4 17.3 5.1 7.6 3.0 0.8+0.05 30V-400 14.0 20.1 5.1 7.6 3.0 0.8+0.05 30V-500 14.0 24.9 10.2 7.6 3.0 0.8+0.05 30V-600 18.0 24.9 10.2 7.6 3.0 0.8+0.05 30V-700 19.1 26.7 10.2 7.6 3.0 0.8+0.05 30V-800 21.6 29.2 10.2 7.6 3.0 0.8+0.05 30V-900 24.1 29.7 10.2 7.6 3.0 0.8+0.05 E. Electrical Characteristics 电气参数电气参数电气参数电气参数 Products model I H I T I MAX V MAX Trip Pdtyp Rmin Rmax (A) (A) (A) (V) (A) (S) (W) Ω Ω 30V-050 0.50 1.00 2.50 4.8 0.6 0.180 0.220 30V-075 0.75 1.50 3.50 5.2 0.6 0.070 0.120 30V-090 0.90 1.80 4.50 5.9 0.6 0.070 0.12 30V-110 1.10 2.20 5.58 6.6 0.7 0.050 0.10 30V-135 1.35 2.70 6.75 7.3 0.8 0.040 0.08 30V-160 1.60 3.20 8.00 8.0 0.9 0.030 0.07 30V-185 1.85 3.70 9.25 8.7 1.0 0.030 0.06 30V-200 2.00 4.00 10.0 9.5 1.2 0.040 0.01 30V-250 2.50 5.00 12.50 10.3 1.2 0.020 0.04 30V-300 3.00 6.00 15.00 10.8 2.0 0.020 0.05 30V-400 4.00 8.00 20.00 12.7 2.5 0.010 0.03 30V-500 5.00 10.00 25.00 14.5 3.0 0.010 0.03 30V-600 6.00 12.00 30.00 16.0 3.5 0.005 0.02 30V-700 7.00 14.00 35.00 17.5 3.8 0.005 0.02 30V-800 8.00 16.00 40.00 18.8 4.0 0.005 0.02 30V-900 9.00 18.00 45.00 20.0 4.2 0.005 0.01 Series 30V Rev : www.leiditech.com 01.06.2015 2/3
术语说明术语说明术语说明术语说明 /head2right I H =HOLD CURRENT: MAXIMUM CURRENT AT WHICH THE DEVICE WILL N OT TRIP AT 25℃ STILL AIR. I H ：保持电流―――25℃静态空气环境中PPTC 不工作的最高电流 /head2right I T =TRIP CURRENT: MINIMUM CURRENT AT WHICH THE DEVICE WILL AL WAYS TRIP AT 25℃ STILL AIR. I T ：触发电流―――25℃空气环境中PPTC 动作所需的最小电流 /head2right T TRIP =MAXIMUM TIME TO TRIP(S) AT ASSIGNED CURRENT. T TRIP ：动作时间――－25℃空气环境5倍IH时最大动作时间 /head2right V MAX =MAXIMUM VOLTAGE DEVICE CAN WITHSTAND WITHOUT DAMAGE AT RATE D CURRENT. V MAX ：最大工作电压―――PPTC 的最大工作电压 /head2right I MAX =MAXIMUM FAULT CURRENT DEVICE CAN WITHSTAND WITHOUT DAMAGE A T RATED VOLTAGE. I MAX ：PPTC 最大承受电流 /head2right R MIN =MINIMUM DEVICE RESISTANCE AT 25 ℃ PRIOR TO TRIPPING. R MIN ：最小电阻―――25℃环境温度下PPTC 最小零功率阻值 /head2right R MAX =MAXIMUM DEVICE RESISTANCE AT 25 ℃ PRIOR TO TRIPPING. R MAX ：最大电阻―――25℃环境温度下 PPTC 最大零功率阻值 F. Thermal Derating Chart (A) G. Test Procedures and Requirements 测试条件测试条件测试条件测试条件 Test 测试项目 Test Conditions 测试条件 Accept/Reject Criteria 判定标准 Resistance In still air @ 25 Rmin ≤R ≤R max Time to Trip Vmax, 25 In still air @ 25 ℃ T ≤max. time to trip(seconds) Hold Current 30 min. at I H In still air @ 25 No trip Trip Cycle Life Vmax, Imax, 100 cycles In still air @ 25 No arcing or burning Trip Endurance Vmax, 1 hours In still air @ 25 No arcing or burning Series 30V Shanghai Leiditech Electronic Co.,Ltd Email: sale1@leiditech.com Tel : +86- 021 50828806 Fax : +86- 021 50477059 Rev : www.leiditech.com 01.06.2015 3/3