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muRata BLM15KD121SN1D
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- mu Rata BLM15KD121SN1D
- Type
- MURATA
- Unit
- Electronic Component
- Minimum package
- 10000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- MURATA
- Electronic Component
- BLM15KD121SN1D
- Electronic Component
- 1
- Package
- 0402
- Electronic Component
- Ferrite Bead
- Electronic Component
- ±25%
- Electronic Component
- 0.015g
- Electronic Component
- 1
- Channel Count
- 1
- Electronic Component
- BM0257359366
- Operating Temperature
- 55℃~+125℃
- Current
- 1.5A
- @Frequency
- 120Ω@100MHz
- Resistor(DCR)
- 70mΩ
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
muRata BLM15KD121SN1D 产品概述
一、产品简介
BLM15KD121SN1D 是村田（muRata）系列的单通道铁氧体磁珠，封装尺寸为 0402（公制 1005）。在 100MHz 时名义阻抗为 120Ω，允许误差 ±25%，直流电阻（DCR）约为 70mΩ，额定通过电流 1.5A，工作温度范围 -55℃ 至 +125℃。此类磁珠主要用于高频电磁干扰（EMI）抑制与电源/信号线的去耦滤波。
二、主要电气参数与含义
- 阻抗：120Ω @ 100MHz（±25%），表示在该频点对共模/差模高频噪声的抑制能力。误差范围意味着实际阻抗可能在约 90Ω 至 150Ω 之间。
- 直流电阻（DCR）：70mΩ，决定了通过直流时的压降与发热。
- 额定电流：1.5A，超过此电流会引起过度升温或磁珠特性退化。
- 温度范围：-55℃~+125℃，适用于大多数商业与工业环境。
计算参考：在额定电流下，最大直流压降约为 1.5A×0.07Ω = 0.105V，功耗约为 1.5^2×0.07 = 0.1575W，需考虑热管理与布局。
三、典型应用场景
- 移动终端、通信设备的电源线噪声抑制与局部去耦；
- 高速数字接口（如 USB、HDMI、LVDS 等）和射频前端的共模/差模干扰处理（需结合电容构成 LC/π 滤波结构）；
- 工业与汽车电子中对高频干扰敏感的信号线与电源轨保护（参考工作温度与额定电流）。
四、选型建议
- 若电流接近或超过 1.5A，应选择更大额定电流或更低 DCR 的型号以降低压降与发热；
- 对于需要在更低或更高频段抑制噪声的场景，应参考完整的阻抗频率特性曲线，而不仅仅依赖 100MHz 数据点；
- 若对阻抗稳定性要求高，注意 ±25% 的容差对系统滤波性能的影响。
五、布局与焊接注意
- 尽量将磁珠靠近噪声源或被保护器件的电源端布置，走线短且粗，减小寄生电感与电阻；
- 0402 为微小封装，贴装时注意回流焊工艺与焊膏量，避免热应力与机械应力；
- 储存与搬运按常规 SMD 器件管理，避免过度潮湿与机械碰撞。
六、测试与可靠性
- 阻抗建议使用网络分析仪或 LCR 表在 100MHz 测试；DCR 用四线制电阻计测量以获得准确值；
- 在高温或高电流工况下，应验证实际温升与长期热循环可靠性，确保器件特性稳定。
七、替代与采购建议
选型替代时应匹配：阻抗@目标频率、封装尺寸、额定电流、DCR 与温度等级。采购时优先选择原厂或授权分销商，查看供应批号与规格书以确认一致性。
总结：BLM15KD121SN1D 以其 0402 小型化封装与 100MHz 附近较高阻抗，适合移动与通信类产品的高频 EMI 抑制。正确选型与合理布局能在保证信号完整性的同时有效降低电磁干扰。
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