WMSIC Electronic Components

KEMET T494B475K016AT

ModelT494B475K016AT
PackageCASE-A-3216-18(mm)
BrandKEMET
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 22+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
KEMET T494B475K016AT
Type
KEMET
Minimum package
2000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
KEMET
Electronic Component
T494B475K016AT
Electronic Component
1
Electronic Component
4.7uF
Package
CASE-A-3216-18(mm)
Electronic Component
Capacitor
Electronic Component
±10%
Electronic Component
0.091g
Electronic Component
1
Electronic Component
BM0264870552
Operating Temperature
55℃~+125℃
Voltage
16V
Electronic Component
Electronic Component
Electronic Component
2000
Resistor(ESR)
1.5Ω

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

T494B475K016AT 产品概述

一、产品简介

T494B475K016AT 为 KEMET(基美)生产的一款固体钽电容器,规格参数如下:

  • 容值:4.7 µF(475)
  • 精度:±10%(K)
  • 额定电压:16 V(016)
  • 等效串联电阻(ESR):1.5 Ω
  • 工作温度范围:-55 ℃ ~ +125 ℃
  • 封装/外形:CASE-A,尺寸 3.2 × 1.6 × 1.8 mm(1411 / 3528 公制)
  • 封装形式代码示例:1411(3528)

该型号属于小体积、高容积效率的固体钽电容类产品,适合在空间受限且要求长期稳定性的电源去耦和滤波场合使用。

二、主要性能与特点

  • 体积小、容值密度高:在 3.2 × 1.6 × 1.8 mm 的封装内提供 4.7 µF 的容量,适合贴片密集的现代电路板设计。
  • 宽温度范围:-55 ℃ 至 +125 ℃,能满足工业级温度需求。
  • 良好的稳定性与可靠性:固体钽材料固有的电容稳定性,适合对长期容量保持有要求的场合。
  • 典型低频 ESR 表现:额定 ESR 约为 1.5 Ω(在实际应用中 ESR 会受频率、温度和偏压影响)。
  • 极化器件:为极性电容,使用时需注意极性方向。

三、典型电气与机械参数

  • 标称电容:4.7 µF ±10%
  • 额定电压:16 V
  • ESR(典型):1.5 Ω
  • 温度范围:-55 ℃ ~ +125 ℃
  • 外形尺寸(CASE-A):3.2 mm × 1.6 mm × 1.8 mm
  • 封装类型:1411(对应 3528 公制封装)

注:上述 ESR、尺寸为典型值,设计时应以厂商正式数据表与样片测试结果为准。

四、典型应用场景

  • 开关电源与稳压电路的输入/输出滤波与旁路去耦
  • 数字电路及微处理器电源去耦(靠近负载布板)
  • 空间受限的消费类电子、通信设备、工业控制模块
  • 对长期容量稳定性有要求的电路(注意钽电容的稳态与冲击特性)

注意:钽电容对浪涌电流和快速升压较敏感,在高脉冲或大纹波电流场合需谨慎选型;如需处理高纹波电流或超低 ESR,建议评估聚合物钽或多层陶瓷电容(MLCC)替代方案。

五、设计与焊接建议

  • 极性识别:钽电容为极性器件,必须按标注方向正确焊接(正极通常有明显标记)。
  • 额定电压降额:为提高可靠性,建议在关键应用中对额定电压进行降额使用(常见做法为取额定电压的 50%–80%,具体降额比依实际环境与可靠性要求确定)。
  • 限制浪涌电流:避免直接在存在大浪涌或瞬态高压的节点使用;若不可避免,应在电路中加入限流或缓启动措施。
  • 回流焊规范:遵循厂商推荐的回流焊曲线与峰值温度,避免过高峰值温度与长时间高温暴露以防性能退化。
  • PCB 布局:器件应尽量靠近需去耦的 IC 电源引脚布置,焊盘与过孔设计应配合对应封装尺寸以保证焊接可靠性。
  • 清洗与处理:遵守厂商对化学清洗剂、涂覆材料(如覆铜、阻焊)与波峰/回流工艺的兼容性建议。

六、可靠性与选型注意事项

  • ESR 与纹波能力:ESR 值直接影响器件承受的纹波电流能力。若电路纹波电流较大,应评估器件的纹波额定值或选用低 ESR 选项。
  • 温度与寿命:高温长时间工作会加速老化并影响泄漏电流与容量,设计时应考虑热管理与散热路径。
  • 替代选项:对于需要极低 ESR、极高脉冲能力或无极性要求的场合,可考虑 MLCC 或聚合物钽电容替代。
  • 认证与应用级别:若用于汽车、航空或医疗等需要特殊认证的领域,请向供应商确认是否有相应资格或经认证的同系列产品。

七、型号解读与采购建议

  • 型号示例说明(供参考):T494B475K016AT 中通常可解读出系列、容量(475=4.7µF)、精度(K=±10%)、额定电压(016=16V)等信息,但具体编码规则请以 KEMET 官方数据表为准。
  • 采购建议:在批量采购前建议索取数据表、样品并进行实际电气与热应力测试;对关键或高可靠性应用,请要求厂商提供可靠性报告、测试规范与回流焊工艺资料。

如需我帮您整理该型号的原厂数据表要点、PCB 封装焊盘建议或与替代型号的对比(例如更低 ESR 的聚合物钽或 MLCC 方案),可提供您的具体应用场景与电气要求,我会给出更有针对性的建议。

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