Firstohm提供无银的MELF电阻器,已通过ANSI-EIA-977测试,有效防止硫化故障
贴片电阻已成为当今电子电路中最常见的元件之一。但是,贴片电阻的电极结构中含有银(Ag)。当空气中有大量硫时,银倾向于与之反应并变成硫化银(Ag2S或Ag2SO4),银便失去了导电性,电阻值逐渐增大,最终变为开路。以下是贴片电阻的内部结构图:
贴片电阻硫化与故障的解决方案:用保形涂层技术在PCB上均匀地涂覆保形涂层,这可以形成一层有效的保护膜,阻隔空气并防止硫化,但该过程增加了制造时间和成本,并阻碍了PCB散热。
抗硫化的最佳选择:
FIRSTOHM可提供MELF电阻器——该类产品在生产过程和原材料中没有银(Ag)含量,因此发生硫化的可能性小。除化工、采矿、火力发电、汽车电子等含硫环境以外,该电阻器还可用于对可靠性要求较高的高端应用,如电信。
实验:
标准:根据国际无源元件硫化验证标准:ANSI-EIA-977进行测试。
测试条件:将样本放在暴露于试验环境的容器中(见下图),温度为105℃,持续750小时。
测试结果:通过
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技术问答 发布时间 : 2024-08-30
【选型】硕凯电子(Socay)电路保护器件(GDT/TVS/ESD/TSS/MOV/MLV/PPTC/SPG)选型指南
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柱状贴片电阻(MELF Resistor)不论在电子特性或是机械特性都比片状电阻(Chip Resistor)优秀,所以广泛应用在工业电源、智能电表、太阳能逆变器、储能设备、通信设备、新能源汽车、医疗等相关领域。
技术问答 发布时间 : 2024-08-30
【选型】Firstohm(第一电阻)电阻产品选型指南(中文)
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T/R-4000,QH100W,QHO 7W,HFR007K0106B0E,PHF2 4W,KNH020,MF01SFF****A*0,PRM03W,WPR-300,KNH025,KNPA-50,PRVB-10W,QW20W,KNP-50,WWR,PRMA5W,TFRC2WJP361B00,GRM0系列,HDWR85W,MOR-50,PHF15WJP823B00,MGRN8W,TMOV-700,PRZ系列,PS系列,CFR0S4J0100A50,KNP*-200-S,HFR0W2,KNS07W,KNPI1W,KNPI2S,KNP*W4,CFR01W,KNS08W,KNP*W2,PFAP3W,CFR01S,PRWC-1 5W,PRC16W,QL150W,LE06 1/4W 5% 1.2 Ω T/R-5000,ES系列,QH300W,PRTM20JP303B00,MF006,FWR,KNP*-500,CPR0W2,MOR-25,HEWR1000W,AS06,MF004,AS07,AS05,PHF1 SERIES,HAWF,AS02,AS03,KNH080,PRM05W,MOR-300,KNPI1S,CFR02W,202,PRC15W,HAWR,PFAP2W,CFR02S,PRTC15W,ES06 2/3W 5% 1.2Ω T/R-5000,CM06 1/4W 5% 1.2 Ω T/R-5000,HPWR,HFWR 330W –5% 100Ω B/B,PDM50W,CPXXS3,MGR01WJ0276A10,CPXXS2,AS12,AS10,KNS05W,VS1007F1503T4E,TOE01327000000,KNHW系列,HPWR 110W –5% 10Ω B/B,MF02SFF****A*0,WPR-100,QW40W,PRWC-1 6W,KNH060,CMO020J0100B00,PRM07W,PRS-15W,QR750W,HFH01W,HEWR系列,QL40W,MGR,MF006FF****A*0,PRM5W,MF02W,MF02S,QRZG750W,MGR01S,CFR-12,PRW20W,PRM SERIES,MGR01W,KNH-50W,LR122WF500NT4E,MF-50-S,PRT系列,QW25W,MFC11752101201,PRU SERIES,CFR0W8,MOR0W4,TMOR3W,PRWC2W,MOR0W2,PRWI4WJW470B00,QH/80W,KNP*-300,PFAS 5W,MF03W,FWRA-200-S,PDM050J080JB00,KNP*-50-S,MF03S,HEWR60W,CTXXS3,CTXXS2,PRDL,KNPI5W,HEWR2000W,KNPI5S,PMR01SJ0101A50,FRN0S2,CSR系列,HV系列,KNP-200,PRWC1W,QR150W,KNP-200-S,PRT 40W,PRM7W,CM系列,KNPI3W,KNHA-30W,NM系列,FWR-200-S,WPR03WJ****A*0,PRU 20W,PF01,HAWR60W,PRMT20W,PF07,TL07,PS05W3J0124T5E,PF06,TL06,HFHB,TL05,PFAP5W,PF03,TL03,PF02,TL02,PF05,TL01,MF01W,FTR10,MF01S,TMOR5W,PFAS 7W,ML系列,CS07,QR系列,CS06,CFR0W2,CS05,CFR0W4,KNPA系列,CS03,CS02,KNPI2W,KNPI-200-5,HPWR00J0100110,KNPI3S,PRWA SERIES,ZOC0W4,KNPA3WS 5% 12Ω T/B-1000,SP123WF100JT2E,KNPI-50,CFR-100-,KNPI-1000-S,PRWC3W,QH400W,KNPA-1000-S,PFAS 10W,NS10,NS12,QRZG225W,1206 1/4W 5% 1.2 Ω T/R-5000,PRWI 7W,PFA 10W,CFR-50,CS12,CS11,ZOC0W8,CS10,PRW25W,PRW025,PHF3 SERIES,PRW020,TMOV7W,MOR0S2,KNP*-25,QW600W,2S02 1/16W –5%1.2K T/R-10000,PRWA2W,PF0A,NS01,NS02,PHF02WJW391B00,KNP*-100,NS07,NS03,ZOC-12,HAWF系列,NM02WGJ012JTCE,NS05,KNHB系列,NS06,CTXXW8,PF10,TL10,CTXXW3,QH600W,FRN0W4,PF12,PF11,FRN0W2,CTXXW4,CFR-100-S,MPCR系列,KNPI9W,FWRA-300-S,HFR系列,KNPI9S,PRM2W,TL12,PRWC5W,PRVA-20W,PRM3W,MF0S4FF****A*0,MGR03U,MGR03S,CM06W4J012JT5E,ZOC-25,MGR03W,PRW02W,PRW03W,HAWR80W,PHF系列,GRM100J0220B00,PRU 40W,CFR-25,KNPI8W,PDM35W,16P8,KNP-100-S,KNPI8S,SN0004,SN0003,QL120W,RA205WF300NTBE,SN0002,SN0001,PRZCFWJW100B00,FWRA,PRWC7W,QL25W,KNP*-50,WPR04WJ****A*0,FWR-300-S,WR181WJ0124T4E,MGR02S,CFR系列,MGR02W,PRW01W,KNPI7W,PRTM4W,MOR,QRZG00J018J225,FRN-25,KNPI7S,WRA5S,HBWR600W,NS06W2J012JT5E,PDM10W,KNPI-100,NQ12,MGR-300-SS,NQ10,PRMT,PRMS,HEWR200W,ES01,ES02,PRS020,PFAT SERIES,ES03,QW200W,ES05,ES06,ES07,MS061WF100MT5E,KNPU200,CT33-S,PRWC-1 SERIES,KNPU1W-SS,NQ01,NQ02,NQ03,PRWP系列,NQ05,NQ06,OL系列,NQ07,PRM 10W,QHO 11W,QHO系列,QH50W,PRMA,HFWR330W,TC0625B1001T5J,FRN-40,CSRC Φ1.5MM 10MΩ–5% B/B,CFR-100,PS12,KNH,KNP*-700-S,FWR-300,PS10,HPSR200W,PRVAFWJW33JB00,KNP,FWRA系列,MGRD-50W,MF 1/8W 1% 47.5KΩ T/R-5000,PFAS10W,KNS,PRTC40W,RNL A 型 10 PIN 2% 10KΩ B/B,TMOV5W,MGRD50W,FRN-50,MGR-200,PRWC-1,MGR0**J*******,QL100W,PS02,OSC14014000000,PS03,4
【选型】如何选取合适的电机控制器放电电阻
在电动汽车系统中,电机控制器一般采用被动放电方式,但受限于控制器内部空间限制和电阻功率,导致放电时间长,存在泄漏高压隐患,因此需要主动放电电路。Firstohm第一电阻公司针对车载放电电阻应用推出了MELF圆柱形贴片电阻SRM系列,额定功率最高可达3W,最大工作电压800V,抗浪涌能力最高可达10KV,符合德国VDE0860安全标准。
器件选型 发布时间 : 2019-04-05
电子商城
现货市场
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可贴PCB板厚范围:0.6~2.0mm,也支持生产软硬接合板,拼板长宽:50*50mm~550*500mm,PCBA快速贴片支持01005CHIP元件。
最小起订量: 1片 提交需求>
配备KEYSIGHT网络分析仪,可测量无线充电系统发射机/接收机线圈的阻抗,电感L、电阻R、电感C以及品质因数Q,仿真不同充电负载阻抗下的无线充电传输效率。支持到场/视频直播测试,资深专家全程指导。
实验室地址: 深圳 提交需求>
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