行业组件数据 · 2026

滤波电容器

Filter capacitor for smoothing rectified AC to DC in LED drivers

技术定义与适配语境
典型 滤波电容器 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

A filter capacitor is an electronic component used in power supply circuits to reduce ripple voltage by storing and releasing electrical charge, ensuring stable DC output in high-efficiency LED driver modules. It smooths the pulsating DC from rectifiers, minimizing electromagnetic interference (EMI) and protecting sensitive LED components from voltage fluctuations.

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组件规格

定义
A filter capacitor is an electronic component used in power supply circuits to reduce ripple voltage by storing and releasing electrical charge, ensuring stable DC output in high-efficiency LED driver modules. It smooths the pulsating DC from rectifiers, minimizing electromagnetic interference (EMI) and protecting sensitive LED components from voltage fluctuations.
工作原理
Operates by charging during voltage peaks and discharging during troughs, acting as a low-pass filter that attenuates high-frequency AC components while allowing DC to pass through. In LED drivers, it maintains consistent voltage levels across the load, preventing flicker and ensuring optimal LED performance and longevity.
材料
Typically constructed with aluminum electrolytic or ceramic dielectric materialsaluminum electrolytic capacitors offer high capacitance values (e.g.100-1000µF) for bulk filteringwhile ceramic capacitors provide low ESR for high-frequency noise suppression. Electrolyte: non-solid or solid polymerelectrodes: aluminum foilcasing: aluminum can with insulating sleeve.
ESR
Low ESR (<0.1Ω)
Lifetime
2000 to 10000 hours at rated temperature
Tolerance
±20%
Capacitance
100µF to 1000µF
Voltage Rating
16V to 450V DC
Temperature Range
-40°C to +105°C
标准
ISO 9001IEC 60384AEC-Q200

行业分类与别名

滤波电容器 的常用贸易名称、技术标识和检索关键词。

filter capacitorLED driver capacitorelectrolytic capacitorpower supply capacitorEMI filterDC smoothing capacitor滤波电容器Filter Capacitor电气设备制造 滤波电容器

上级产品

该组件会出现在以下整机或工业产品中。

LED驱动器
用于调节LED筒灯电流的电子电源组件
查看产品详情 ->
滤波电路（扼流圈与电容器）
一种无源电子电路，通过降低交流纹波电压来平滑整流器输出的脉动直流电。
查看产品详情 ->
高效LED驱动模块
将交流电转换为直流电，为LED照明系统供电的电子电源组件。
查看产品详情 ->
输出滤波器
一种用于滤除和平滑逆变器功率开关级输出波形的电气组件。
查看产品详情 ->
输出滤波器（D类/开关放大器）
一种用于滤除D类或开关放大器输出信号中高频开关噪声的滤波电路。
查看产品详情 ->
输出滤波器（LC滤波器）
一种用于逆变电路中平滑和净化输出信号的LC滤波器，通过衰减高频谐波和噪声来改善信号质量。
查看产品详情 ->

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

High operating temperature exceeding rated limits->Capacitance degradation or open circuit->Use capacitors with higher temperature ratings (e.g., 105°C), improve thermal management with heatsinks or ventilation
Voltage spikes from power surges->Dielectric breakdown leading to short circuit->Implement overvoltage protection circuits, select capacitors with higher voltage ratings (e.g., 1.5x operating voltage)

工业生态与工程逻辑

兼容对象
High-Efficiency LED Driver ModuleSwitch-mode power suppliesAC-DC converters
可替换件
PanasonicNichiconRubyconTDKVishay
0
Overheating from high ripple current
1
Electrolyte leakage causing circuit damage
2
Reduced lifespan in high-temperature environments

合规与检测

tolerance
Capacitance tolerance within ±20% as per IEC 60384 standards
test method
Testing includes capacitance measurement (LCR meter), ESR analysis, leakage current test, and temperature cycling per AEC-Q200 for automotive-grade applications

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采购评估维度

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技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例，不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

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阳极端子
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阳极/阴极端子
Anode and cathode terminals are critical electrical connection points in thyristors and triacs that control current flow direction and device triggering.
灭弧室/隔弧板
Critical safety component in circuit breakers and fuse holders that contains and extinguishes electrical arcs during interruption.
灭弧栅片
Arc chute plates are insulating plates in circuit breakers that split and cool electrical arcs during interruption to ensure safe current interruption.

常见问题

Why are filter capacitors important in LED driver modules?

They smooth rectified AC to stable DC, preventing LED flicker, reducing heat generation, and extending LED lifespan by minimizing voltage fluctuations.

What are common failure modes of filter capacitors in LED drivers?

Electrolyte drying, increased ESR, capacitance loss, or short circuits due to overvoltage, high temperature, or poor quality, leading to driver malfunction or LED damage.

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CNFX Industrial Component Index · 电气设备制造

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