行业组件数据 · 2026

并联电容器

A shunt capacitor is a passive electrical component used in industrial circuits to improve power factor, filter harmonics, and stabilize voltage by storing and releasing electrical energy.

技术定义与适配语境
典型 并联电容器 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 shunt capacitor is an electrical device connected in parallel with a load or circuit to provide reactive power compensation. In industrial applications, particularly within Input Matching Networks, it corrects power factor by offsetting inductive loads, reduces harmonic distortion, and enhances voltage stability. It consists of conductive plates separated by a dielectric material, with capacitance measured in farads (typically microfarads or picofarads in industrial settings).

组件规格

定义
A shunt capacitor is an electrical device connected in parallel with a load or circuit to provide reactive power compensation. In industrial applications, particularly within Input Matching Networks, it corrects power factor by offsetting inductive loads, reduces harmonic distortion, and enhances voltage stability. It consists of conductive plates separated by a dielectric material, with capacitance measured in farads (typically microfarads or picofarads in industrial settings).
工作原理
The shunt capacitor operates on the principle of capacitive reactance, which opposes changes in voltage. When connected in parallel, it supplies leading reactive power to counteract the lagging reactive power from inductive loads (e.g., motors, transformers), thereby improving the power factor. In Input Matching Networks, it helps match impedance between sources and loads to maximize power transfer and minimize reflections, based on the formula Xc = 1/(2πfC), where Xc is capacitive reactance, f is frequency, and C is capacitance.
材料
Typically made with metallized polypropylene film or aluminum electrolytic materials for the dielectricwith aluminum or copper electrodes. Encapsulation may use epoxy resin or plastic casings for insulation and protection. High-temperature variants use ceramic or film dielectrics rated for industrial environments.
Lifetime
100,000 hours at rated conditions
Tolerance
±5% to ±10%
Voltage Rating
250 V to 1000 V AC
Frequency Range
50 Hz to 60 Hz (standard), up to 1 MHz for high-frequency applications
Capacitance Range
1 μF to 1000 μF
Temperature Range
-40°C to +85°C
标准
ISO 9001IEC 60831UL 810

行业分类与别名

并联电容器 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

Overvoltage or voltage spikes->Dielectric breakdown leading to short circuit->Use surge protectors, select capacitors with higher voltage ratings, and implement regular voltage monitoring.
High ambient temperatures or poor ventilation->Thermal degradation and reduced capacitance->Ensure adequate cooling, use capacitors rated for high temperatures, and install in well-ventilated areas.

工业生态与工程逻辑

0
Overheating due to excessive current or harmonics
1
Dielectric breakdown from voltage surges
2
Reduced lifespan in high-temperature environments
3
Risk of explosion if improperly rated or installed

合规与检测

tolerance
Capacitance tolerance within ±5% to ±10% as per IEC 60831 standards
test method
Testing includes capacitance measurement with LCR meters, dielectric withstand voltage tests, and thermal cycling per ISO 9001 and UL 810 protocols.

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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 primary function of a shunt capacitor in an Input Matching Network?

In an Input Matching Network, a shunt capacitor primarily helps match impedance between a source and load to optimize power transfer, reduce signal reflections, and improve system efficiency by compensating for inductive reactance.

How does a shunt capacitor improve power factor in industrial systems?

It supplies leading reactive power to offset the lagging reactive power from inductive loads, bringing the power factor closer to unity, which reduces energy losses, lowers electricity costs, and enhances voltage stability.

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URN:CNFX:ME:UNIT:SHUNT_CAPACITOR