行业组件数据 · 2026

电容器

A capacitor is an electrical component that stores and releases electrical energy in a filter network.

技术定义与适配语境
典型 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 capacitor is a passive two-terminal electrical component that stores electrical energy in an electric field. In filter networks, it is used to smooth voltage fluctuations, filter out noise, and stabilize power supply by charging and discharging according to circuit demands. It consists of two conductive plates separated by a dielectric material, with capacitance measured in farads (F).

组件规格

定义
A capacitor is a passive two-terminal electrical component that stores electrical energy in an electric field. In filter networks, it is used to smooth voltage fluctuations, filter out noise, and stabilize power supply by charging and discharging according to circuit demands. It consists of two conductive plates separated by a dielectric material, with capacitance measured in farads (F).
工作原理
Capacitors operate by accumulating electric charge on their plates when a voltage is applied, creating an electric field across the dielectric. In filter networks, they work with inductors or resistors to block direct current (DC) while allowing alternating current (AC) to pass, filtering specific frequencies to reduce ripple and noise in power supplies or signal lines.
材料
Common materials include aluminum electrolytic (aluminum oxide dielectric)ceramic (titanium dioxide or barium titanate)film (polyesterpolypropylene)and tantalum (tantalum pentoxide). Electrolytes may be used in electrolytic types.
ESR
Low equivalent series resistance for efficiency
Tolerance
±10% to ±20%
Capacitance
1 μF to 1000 μF typical
Voltage Rating
10V to 450V DC
Temperature Range
-40°C to +105°C
标准
ISO 9001IEC 60384DIN 41328

行业分类与别名

电容器 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Dielectric degradation due to overheating->Reduced capacitance or short circuit->Use capacitors with higher temperature ratings and ensure proper cooling in the circuit design.
Voltage spikes exceeding rating->Catastrophic failure or explosion->Implement overvoltage protection circuits and select capacitors with a voltage rating above the maximum expected voltage.

工业生态与工程逻辑

0
Overvoltage can cause dielectric breakdown
1
High temperatures may reduce lifespan
2
Polarity reversal in electrolytic types leads to failure

合规与检测

tolerance
Capacitance tolerance typically ±10% to ±20% as per application requirements
test method
Testing includes capacitance measurement (LCR meter), voltage withstand test, and ESR evaluation under specified environmental conditions.

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

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

常见问题

What is the role of a capacitor in a filter network?

In a filter network, a capacitor smooths voltage by storing and releasing charge to reduce ripple and filter out unwanted AC noise, ensuring stable DC output.

How do I select a capacitor for a filter application?

Choose based on capacitance value, voltage rating, temperature stability, and ESR. Consider the frequency range and environmental conditions of the application.

我可以直接联系工厂吗?

CNFX 是开放目录,不是交易平台或采购代理。工厂资料和表单用于帮助你准备直接沟通。

CNFX Industrial Component Index · 电气设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 电容器

说明目标数量、应用场景、交期和关键技术要求,用于准备 RFQ 或供应商评估。

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URN:CNFX:ME:UNIT:CAPACITOR