INDUSTRY COMPONENT

Power Supply Decoupling Capacitors

Power supply decoupling capacitors filter noise and stabilize voltage in clock distribution buffers for reliable digital circuit operation.

Component Specifications

Definition
Power supply decoupling capacitors are passive electronic components placed near integrated circuits to provide local energy storage, filter high-frequency noise, and maintain stable voltage levels in clock distribution buffers, ensuring signal integrity and preventing timing errors in digital systems.
Working Principle
They operate by storing electrical charge and releasing it rapidly to compensate for sudden current demands, while acting as low-impedance paths to ground for high-frequency noise, thereby decoupling the power supply from the load.
Materials
Typically multilayer ceramic capacitors (MLCCs) with dielectric materials like X7R or C0G/NP0, or tantalum capacitors with manganese dioxide or polymer electrolytes.
Technical Parameters
  • ESR <100 mΩ
  • Tolerance ±10% to ±20%
  • Capacitance 0.1 µF to 10 µF
  • Voltage Rating 6.3 V to 50 V
  • Temperature Range -55°C to +125°C
Standards
IEC 60384, EIA RS-198

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Power Supply Decoupling Capacitors.

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Capacitor aging or degradation
  • Incorrect capacitance or placement
  • Overvoltage or overheating
FMEA Triads
Trigger: Dielectric breakdown due to overvoltage
Failure: Short circuit or open circuit
Mitigation: Use capacitors with appropriate voltage ratings and implement overvoltage protection circuits.
Trigger: Thermal stress from high operating temperatures
Failure: Reduced capacitance or increased ESR
Mitigation: Select capacitors with suitable temperature ratings and ensure proper thermal management.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Capacitance tolerance typically ±10% to ±20%, voltage derating recommended at 50-80% of rated voltage
Test Method
Testing per IEC 60384 for capacitance, ESR, leakage current, and voltage withstand; in-circuit verification of noise suppression.

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

Why are decoupling capacitors critical in clock distribution buffers?

They prevent power supply noise from causing jitter or timing errors in clock signals, which is essential for synchronous digital systems.

What happens if a decoupling capacitor fails?

Failure can lead to increased noise, voltage spikes, clock signal degradation, and potential system malfunctions or data corruption.

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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