INDUSTRY COMPONENT

Capacitor

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

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
ParameterTypical rangeNotes & selection driver
ESRLow equivalent series resistance for efficiency
Tolerance±10% to ±20%
Capacitance1 μF to 1000 μF typical
Voltage Rating10V to 450V DC
Temperature Range-40°C to +105°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 9001, IEC 60384, DIN 41328

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Capacitor

Manufacturer profiles associated with Capacitor.

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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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