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EPZ1005E221-1R2T是顺络电子(Sunlord)推出的0402封装片式磁珠,属于高频电磁干扰(EMI)抑制元件,专为小型化、高密度电子设备的噪声过滤设计,兼顾宽温适应性与低损耗传输特性。
作为顺络常规系列磁珠的一员,该型号针对100MHz频段的射频干扰(RFI)优化,适用于需要精准噪声抑制且对封装尺寸敏感的场景(如便携式电子、物联网模块等)。其核心作用是过滤电路中的高频噪声,同时不影响直流/低频信号的正常传输。
标称阻抗为220Ω@100MHz,误差±25%。需注意:磁珠阻抗并非固定值,而是随频率变化的特性参数——100MHz是电子设备中常见的射频干扰频段(如蓝牙、WiFi、5G的部分频段),该阻抗值能有效衰减该频段的噪声信号。
直流电阻(DCR)仅100mΩ,在额定电流1.2A下,直流损耗约为0.144W(I²R=1.2²×0.1),对电路直流供电或信号无明显压降,保证电路正常工作。
工作温度范围**-55℃~+125℃**,满足工业级、部分汽车级场景的温度要求,适应恶劣环境。
针对100MHz噪声频段的阻抗设计,比通用磁珠更具针对性,抑制效果更显著;
低DCR减少直流功耗,适合对电源效率要求高的便携式设备;
0402封装缩小了PCB占用面积,支持设备轻薄化设计;
在极端温度下保持阻抗特性稳定,避免温度变化导致噪声抑制失效。
智能手机、智能手表、平板电脑等,用于蓝牙、WiFi、5G射频电路的干扰抑制,匹配小型化需求;
NB-IoT、LoRa、ZigBee模块,过滤模块与传感器/控制器之间的电磁干扰,提升通信稳定性;
DC-DC转换器、LDO稳压器输出端,抑制电源线上的高频噪声,优化供电质量;
PLC、传感器节点、工业物联网网关,适应-55℃~+125℃宽温,保证工业场景的可靠性;
车载蓝牙、WiFi模块、车机信息娱乐系统,满足车载环境的温度与EMC要求。
若应用场景的主要干扰频率偏离100MHz(如2.4GHz),需选择对应频率点阻抗匹配的磁珠(如顺络EPZ系列中2.4GHz频段型号);
实际工作电流需保留10%-20%裕量(即≤1A左右),避免电流过大导致磁珠饱和;
0402封装需匹配PCB焊盘尺寸(建议焊盘长0.8-1.0mm,宽0.4-0.5mm),避免焊接不良;
符合RoHS、REACH指令,支持出口产品需求,部分场景可满足IEC可靠性测试(如温度循环、湿度试验)。
顺络对该型号的可靠性测试包括:耐焊接热(260℃/10s)、温度循环(-55℃~+125℃,1000次)、湿度试验(85℃/85%RH,1000h),保证长期使用稳定性;同时采用无铅工艺,符合全球环保标准。
总结:EPZ1005E221-1R2T是一款高性价比、小型化、宽温稳定的0402磁珠,适合对100MHz频段噪声抑制有需求的电子设备,兼顾性能与集成度,是便携式、工业级场景的优选元件。
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