INDUSTRY COMPONENT

Capacitor (Fixed)

A fixed capacitor is a passive electronic component that stores electrical energy in an electric field, used in resonant circuits for frequency tuning and filtering.

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Component Specifications

Definition
A fixed capacitor is an electronic component with a constant capacitance value, constructed from two conductive plates separated by a dielectric material. In resonant circuits, it works with inductors to create specific resonant frequencies for applications like signal filtering, oscillation, and impedance matching. Unlike variable capacitors, its capacitance cannot be adjusted after manufacturing.
Working Principle
It operates by storing electrical charge between its plates when voltage is applied, creating an electric field across the dielectric. In a resonant circuit, it interacts with an inductor to form an LC circuit, where energy oscillates between the capacitor's electric field and the inductor's magnetic field at a resonant frequency determined by the capacitance and inductance values.
Materials
Common materials include aluminum or tantalum for electrodes, with dielectrics such as ceramic (e.g., Class 1 or Class 2), polyester film, polypropylene, or electrolytic materials (e.g., aluminum oxide). Leads are typically made of tin-plated copper.
Technical Parameters
  • Tolerance ±1% to ±20%
  • Capacitance 1 pF to 1000 μF
  • Voltage Rating 10 V to 1000 V DC
  • Dielectric Type Ceramic, Film, Electrolytic
  • Temperature Coefficient -55°C to +125°C
Standards
ISO 9001, IEC 60384, MIL-PRF-39014

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Capacitor (Fixed).

fixed capacitor resonant circuit capacitor types electronic components capacitance dielectric materials LC circuit frequency tuning Capacitor (Fixed) Capacitor (Fixed) in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Resonant Circuit

An electronic circuit that naturally oscillates at a specific resonant frequency determined by its inductance and capacitance components.

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Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown due to overvoltage
  • Capacitance drift with temperature changes
  • Leakage current leading to circuit inefficiency
FMEA Triads
Trigger: Overvoltage or voltage spikes
Failure: Dielectric breakdown causing short circuit
Mitigation: Use capacitors with voltage ratings above operating conditions and implement surge protection.
Trigger: High operating temperatures
Failure: Reduced capacitance or premature aging
Mitigation: Select capacitors with appropriate temperature ratings and ensure adequate cooling.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Capacitance tolerance typically ±5% to ±10% for industrial applications
Test Method
Testing per IEC 60384 standards for capacitance, voltage rating, and insulation resistance.

Buyer Feedback

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Frequently Asked Questions

What is the role of a fixed capacitor in a resonant circuit?

It sets the resonant frequency by storing and releasing electrical energy in conjunction with an inductor, enabling precise frequency selection for filtering or oscillation.

How does material choice affect capacitor performance?

Dielectric materials determine properties like stability, temperature tolerance, and loss characteristics; for example, ceramic capacitors offer high stability, while electrolytic types provide high capacitance in small sizes.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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