PDF《LR72》

EU RoHS 电流检测电阻器 Current Detecting Chip Resistors 本样本手册中记载的产品规格如有变更,恕不一一奉告.

订购以及使用之前,请仔细确认规格表的内容. 用于车载设备、医疗设备、航空设备以及其它涉及人身安全、或可能引起重大损失的设备上时,请务必事先与我公司联系.这些产品在这类用途中出现故障或失灵可能导致人身事故或严重损坏. Speci?cations given herein may be changed at any time without prior notice. Please con?rm technical speci?cations before you order and/or use. Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment. Malfunction or failure of the products in such applications may cause loss of human life or serious damage. www.koaglobal.com CURRENT SENSING LR72 定制表面封装型毫欧电阻器 Surface Mount Type Custom Milliohm Resistors 特点 Features z 超低电阻值(2mΩ),适用于大电流的检测. z 全部是定制品. z 容易焊接,适合回流焊接. z 是无感应型. z 可自动安装. z 端子无铅品,欧盟RoHS对应品. z The super low resistance (2mΩ~) is suitable to detect large current. z All custom-made products. z Easy soldering. Applicable for reflow soldering. z Non-inductive type. z An automatic mounting machine is applicable. z Products with lead free termination meet EU-RoHS requirements. 结构图 Construction a 2Max.

2 0

1 2 加工形状72A 、72B Forming style 72A , 72B 加工形状72C Forming style 72C 11.2±0.4 3.5±0.4 a ① 电阻板 Resistive plate ② 焊接镀层 Solder coat ① ② 外形尺寸 Dimensions 型号Type 尺寸 Dimensions (mm) a LR72A 5.2±0.2 LR72B 3.0±0.2 LR72C 3.2±0.4 品名构成 Type Designation 实例 Example LR

72 TE A 2L0 J N 编带 Taping TE:Taping 成份符号 Element Symbol 72:A, B, C-Style 加工形状 Process Style A B C 品种Product Code 阻值允许偏差 Resistance Tolerance J:±5% 公称电阻值

2 Nominal Resistance

3 digits 端子表面材质 Terminal Surface Material D:SnAgCu N:Non-presolder

1 2 N:无备用焊剂

1 1 无备用助焊剂的类型,以A、B式样为限. Only A and B styles are non-presolder type.

2 只有C式样是SnAgCu Oniy C style is SnAgCu type.

3 电阻值范围(Ω) Resistance Value 3位显示

3 digits 2m~8m 2L0~8L0 欲知关于此产品含有的环境负荷物质详情(除EU-RoHS以外),请与我们联系. 编带细节请参考卷末附录C. Contact us when you have control request for environmental hazardous material other than the substance specified by EU-RoHS. For further information on taping, please refer to APPENDIX C on the back pages. 额定值 Ratings 型号Type 符号 Symbol 额定功率3 Power Rating 可生产的 电阻值范围4 Resistance Range(mΩ) 阻值允许偏差 Resistance Tolerance 电阻温度系数 T.C.R. (*10-6 /K) 规定周围温度 Rated Ambient Temperature 使用温度范围 Operating Temperature Range 编带和包装数/卷Taping &

Q'

ty/Reel (pcs) TE LR72A

72 0.5W 2~8 J:±5% ±100 +70℃ -40℃~+180℃ 2,000 LR72B

72 0.25W 3~5 LR72C

72 1W 2,

3 ±350 +85℃ -40℃~+155℃ 1,500

4 基板材质使用玻璃环氧树脂(FR-4)时的额定功率.

4 Rated power in case of glass epoxy resin (FR-4) is used for the substrate material.

5 由于是定制品,关于电阻值,应在事前商谈.

4 Please consult with us in advance about resistance value for custom-made products. 除上述产品外,也可供应其它形状和电阻值的产品.Other shapes and resistances than the above are also available on request. Mar.

2015 电流检测电阻器 Current Detecting Chip Resistors 本样本手册中记载的产品规格如有变更,恕不一一奉告.订购以及使用之前,请仔细确认规格表的内容. 用于车载设备、医疗设备、航空设备以及其它涉及人身安全、或可能引起重大损失的设备上时,请务必事先与我公司联系.这些产品在这类用途中出现故障或失灵可能导致人身事故或严重损坏. Speci?cations given herein may be changed at any time without prior notice. Please con?rm technical speci?cations before you order and/or use. Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment. Malfunction or failure of the products in such applications may cause loss of human life or serious damage. www.koaglobal.com 负荷减轻特性曲线 Derating Curve

20 20

40 60

80 100

40 60

80 100

120 140

160 180 -40

0 0

155 70

85 Percent rated power LR72C style LR72A,72B style 额定功率比(%) 环境温度 Ambient temperature(o C) -20 在环境温度70℃以上使用时,应按照上图负荷减轻特性曲线,减小额定功率. For resistors operated at an ambient temperature of 70?C or above, a power rating shall be derated in accordance with the above derating curve. 性能 Performance 试验项目 Test Items 标准值 Performance Requirements ΔR±% 试验方法 Test Methods 保证值 Limit 代表值 Typical 电阻值 Resistance 在规定的允许偏差内 Within speci?ed tolerance C 25℃ 电阻温度系数 T.C.R. 在规定值以内 Within speci?ed T.C.C. C 室温/100℃up Room temperature+100℃ 耐焊接热 Resistance to soldering heat

2 1.6 350℃±10℃, 3s 耐湿负荷 Moisture resistance

5 4.5 Power rating*1/10, 40℃, 90%~95%RH, 1000h 1.5小时ON/0.5小时OFF周期 1.5h ON/0.5h OFF cycle 在70℃时的耐久性 Endurance at 70℃

5 4.5 额定负荷,70℃,1000小时,1.5小时ON/0.5小时OFF的周期 Rated voltage, 70℃, 1000h, 1.5h ON/0.5h OFF cycle 使用注意事项 Precautions for Use z 作为分流电阻使用时,应考虑和周围线圈的电磁感应后,配置模式. z 在50mΩ以下的电阻值,由于焊盘图案的大小和接续助焊剂的量,焊接后的电阻值会有变动.应在事前确认电阻值降低?升高的影响后,再设计设 备zIn case of using the low ohm resistors as shunt resistors, please lay out a pattern considering the electromagnetic induction with surrounding inductors. z In the resistance values of 50mΩor under, the resistance value after soldering may change depending on the size of pad pattern or solder amount. Make sure the effect of decline/increase of resistance value before designing. Mar. 2015 ........