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
ParameterTypical rangeNotes & selection driver
ESR<100 mΩ
Tolerance±10% to ±20%
Capacitance0.1 µF to 10 µF
Voltage Rating6.3 V to 50 V
Temperature Range-55°C to +125°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
IEC 60384, EIA RS-198

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

Typical Suppliers & Equivalents

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

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 Power Supply Decoupling Capacitors

Manufacturer profiles associated with Power Supply Decoupling Capacitors.

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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.

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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