INDUSTRY COMPONENT

Capacitor

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

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Component Specifications

Definition
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).
Working Principle
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.
Materials
Common materials include aluminum electrolytic (aluminum oxide dielectric), ceramic (titanium dioxide or barium titanate), film (polyester, polypropylene), and tantalum (tantalum pentoxide). Electrolytes may be used in electrolytic types.
Technical Parameters
  • 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
Standards
ISO 9001, IEC 60384, DIN 41328

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Capacitor.

capacitor filter network electrical component energy storage noise filtering power supply stabilization industrial electronics Capacitor in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Filter Network

A circuit component within a signal conditioning system that selectively passes or blocks specific frequency ranges to remove noise and unwanted signals.

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Impedance Matching Network

A circuit network designed to maximize power transfer or minimize signal reflection by matching the impedance between a source and a load.

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Filter Circuit

An electronic circuit designed to selectively pass or reject specific frequency components from a signal.

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Engineering Analysis

Risks & Mitigation
  • Overvoltage can cause dielectric breakdown
  • High temperatures may reduce lifespan
  • Polarity reversal in electrolytic types leads to failure
FMEA Triads
Trigger: Dielectric degradation due to overheating
Failure: Reduced capacitance or short circuit
Mitigation: Use capacitors with higher temperature ratings and ensure proper cooling in the circuit design.
Trigger: Voltage spikes exceeding rating
Failure: Catastrophic failure or explosion
Mitigation: Implement overvoltage protection circuits and select capacitors with a voltage rating above the maximum expected voltage.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

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.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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