WMSIC Electronic Components

Sunlord SDFL1005Q3R3KTF

ModelSDFL1005Q3R3KTF
Package0402
BrandSUNLORD
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Sunlord SDFL1005Q3R3KTF
Type
SUNLORD
Minimum package
10000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
SUNLORD
Electronic Component
SDFL1005Q3R3KTF
Electronic Component
1
Package
0402
Electronic Component
SMD Inductor
Electronic Component
±10%
Electronic Component
0.019g
Inductor
3.3uH
Electronic Component
1
Factor
20@10MHz
Electronic Component
BM0258491389
Current
10mA
Frequency
28MHz
Resistor(DCR)
2.7Ω
Electronic Component
Electronic Component

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

SDFL1005Q3R3KTF 产品概述

一、产品简介

SDFL1005Q3R3KTF 为顺络(Sunlord)系列贴片电感器,采用 0402(1005 公制)超小封装,额定电感值 3.3 μH,公差 ±10%。该器件针对空间受限的高密度 PCB 设计提供小体积的电感解决方案,适用于小信号滤波、阻抗匹配和 EMI 抑制等场合,但不适合大电流电源滤波用途。

二、主要电气参数

  • 电感值(L):3.3 μH(典型值)
  • 公差:±10%
  • 额定直流电流(Irated):10 mA(建议最大工作电流,超过会引起温升与电感值衰减)
  • 直流电阻(DCR):2.7 Ω(典型)
  • 品质因数(Q):20(在 10 MHz 测量)
  • 自谐振频率(SRF):28 MHz
  • 封装:0402(1005 公制,约 1.0 × 0.5 mm)
  • 典型测量条件需参考厂商数据表,实际应用中应按工作温度和偏置条件复核性能

三、关键性能说明(易混淆点说明)

  • DCR 为直流电阻,仅反映直流或低频下的串联电阻。高频时由于集肤效应和邻近损耗,器件的等效串联电阻会增加,从而使实测 Q 值小于用 DCR 简单计算的理论值(例如在 10 MHz 下,按 DCR 计算的 Q 会显著高于器件标称 Q,说明存在额外的高频损耗)。
  • SRF(28 MHz)为电感与寄生电容并联产生谐振的频率。高于 SRF 时器件表现为电容性,不再视作理想电感,设计时需避免在 SRF 附近或以上工作。
  • 额定电流仅 10 mA,说明该器件定位为小信号应用。若用于偏置或直流通过较大电流,会引起电感值下降及温升,严重时可能超过可靠性极限。

四、典型应用场景

  • 高频小信号滤波:用于对噪声源输出端或天线前端的阻抗匹配及带通/带阻网络(工作频率应低于 SRF 且考虑 Q 值)。
  • EMI/射频抑制:在高阻抗信号线上作为小电流的共模/差模抑制元件或微滤波器。
  • 传感器与测量电路:用于模拟前端的滤波与隔离,适合电流、功耗要求极低的便携或穿戴设备。
  • 注意:不适合大电流电源滤波、功率变换器或作为电源电感使用。

五、设计与布局建议

  • 电流与温升:严格限制通过电感的直流电流在 10 mA 以下,考量 PCB 上热传导与周围元件的温升影响。
  • 频率选择:尽量在显著低于 SRF 的频率范围使用,以保持电感性响应并获得稳定的阻抗特性。
  • 考虑等效串联电阻(ESR):在滤波网络设计中应使用厂家在目标频点的阻抗/ESR 曲线,而非仅用 DCR 计算 Q。
  • PCB 布局:焊盘短、回流路径短、避免在电感附近布置大型铜箔或近距离强磁场源,以减少寄生耦合与损耗。0402 尺寸非常小,手工焊接和拆装有一定难度,建议采用自动贴装与回流焊工艺。
  • 焊接与回流:兼容常见的焊接回流温度曲线,但具体焊接工艺参数请参照顺络的焊接资料与可靠性说明。

六、可靠性与测试建议

  • 上板前建议索取样品并在目标电路中测量实际 L、Q、阻抗随频率的变化,以及在实际温度与 DC 偏置下的电感漂移。
  • 做热循环、湿热及机械应力测试以验证在目标应用环境下的长期可靠性。
  • 测试时注意小尺寸器件的测量误差与夹具引入寄生,必要时采用校准与差分测量。

七、包装与采购提示

  • 产品完整型号为 SDFL1005Q3R3KTF,请在采购时与顺络确认供货状态、包装(常见为卷带包装,适用于自动贴装)以及 RoHS/REACH 等合规证书。
  • 由于 0402 小尺寸器件在贴装与返修上要求较高,量产前建议先拿样进行工艺验证与环境适应性试验。

总结:SDFL1005Q3R3KTF 是一款面向小信号、空间受限场合的 3.3 μH 贴片电感,具有超小体积与适用于高密度 PCB 的优点,但由于 DCR 较高、额定电流低和相对较低的 SRF,设计时应特别注意频率、损耗和电流限制,按实际工作条件进行验证与甄选。若需更详细的频率响应曲线、温度特性或可靠性数据,请参阅顺络官方数据手册或联系厂商技术支持。

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