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FC-SCT5.0-1:50-20A是方成(FC)品牌推出的表面贴装式(SMD)电流互感器,针对工业自动化、新能源监测、电力仪表等场景的小体积、高精度、高集成度需求设计。其核心价值在于通过优化匝数比与内阻设计,实现“高隔离、低损耗、易匹配”的平衡——既满足电气安全隔离要求,又能在不干扰被测回路的前提下,将大电流信号转换为便于MCU、ADC采集的小电流信号,适配各类数字/模拟采集电路。
该产品的核心参数围绕“信号转换精度+电气安全+损耗控制”三大维度设计,具体解析如下:
匝数比1:50决定了初级输入电流与次级输出电流的线性比例:当额定输入电流为20A时,次级可稳定输出0.4A(20A÷50),线性度符合工业级标准(通常≤0.5%FS),避免信号失真;若被测电流为5A(非额定值),次级输出为0.1A,比例一致性保持良好。
1.5kV(Vrms)的隔离电压满足《IEC 60044-1》等标准要求,可有效防止高压回路(如光伏组件、电机绕组)的电压串扰至采集端,保障人员与低电压电路(如控制板、仪表)的安全。
采用小型表面贴装封装(具体尺寸参考方成官方 datasheet,通常为3×5mm级),适配自动化贴片生产线,大幅提升生产效率;同时节省PCB空间,适合高密度电路设计(如微型电力仪表、服务器电源模块)。
方成针对该产品做了多项可靠性优化:
该产品因性能平衡,覆盖多领域的电流采集需求:
电机、变频器的电流监测与过流保护——SMD封装便于集成到PLC、变频器控制板中,1.5kV隔离防止电机高压干扰控制电路;
光伏汇流箱、储能系统的电流采集——低内阻不影响光伏组件发电效率,高隔离满足汇流箱内多回路安全要求;
电流表、功率因数表的信号转换——将20A以内大电流转换为0.4A小电流,适配仪表模拟输入接口;
智能插座、家电控制器的负载监测——小型封装适合智能家居紧凑设计,精准采集电器电流,实现能耗统计与过流保护;
服务器电源模块的电流监测——高密度电路中SMD封装节省空间,低损耗保证电源效率,过流保护防止电源损坏。
被测回路持续电流≤20A,峰值电流≤24A(额定值1.2倍),避免磁芯饱和导致信号失真;
次级输出端负载电阻(含后续电路输入电阻)建议≤20Ω(0.4A×20Ω=8V,避免电压过高),同时适配500uH电感的50/60Hz工频响应;
SMD焊接需遵循回流焊温度曲线(峰值240℃~260℃,时间≤10s),避免手工焊接温度过高损坏封装;
避免安装在潮湿、多尘或强电磁干扰(如高压电缆附近)环境,必要时增加屏蔽层。
FC-SCT5.0-1:50-20A凭借“小体积、高隔离、低损耗”的核心优势,成为工业、新能源、电力等领域20A以内电流采集场景的高性价比选择,适配自动化生产与高密度电路设计需求。
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