Editorial Technical Reference

Aluminum Electrolytic Capacitor

This page explains how Aluminum Electrolytic Capacitor is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Aluminum electrolytic capacitors are polarized capacitors using an aluminum oxide dielectric layer, offering high capacitance per volume for power supply filtering and energy storage.

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Product Specifications

Technical details and manufacturing context for Aluminum Electrolytic Capacitor

Definition

Aluminum electrolytic capacitors are widely used in power supplies, inverters, and electronic circuits for smoothing, filtering, and energy storage. They are specified by capacitance, voltage rating, ripple current, and ESR. Grades differ by temperature rating, lifetime, and ESR, with higher-grade versions for industrial or automotive applications.

Working Principle

The capacitor consists of two aluminum foils separated by paper soaked in electrolyte. Anodization forms a thin aluminum oxide layer on the anode foil, which acts as the dielectric. The high surface area of the etched foil and thin oxide layer provide high capacitance per volume.

Common Materials

Aluminum foil (high purity, etched), Aluminum oxide (dielectric), Electrolyte (borax or organic acid solution), Paper separator, Rubber seal, Aluminum case

Technical Parameters

Parameter	Typical range	Notes & selection driver
Capacitance	0.1–100000 µF	Tolerance typically ±20%IEC 60384-4
Rated Voltage	6.3–450 V DC	Surge voltage 1.1× ratedIEC 60384-4
Operating Temperature Range	-40 to +105 °C	Extended range up to 125°C for high-temp gradesIEC 60384-4
Lifetime at Rated Temperature	2000–10000 h	Endurance test at rated voltage and ripple currentIEC 60384-4
ESR at 100 kHz	0.01–10 Ω	Lower ESR for high-ripple gradesIEC 60384-4
Ripple Current at 100 kHz	0.1–10 A	Maximum allowable AC currentIEC 60384-4
Leakage Current	0.01 CV or 3 µA max µA	After 2 minutes at rated voltageIEC 60384-4
Dissipation Factor (tan δ)	0.1–0.5	At 120 Hz, 20°CIEC 60384-4
Case Diameter	5–35 mm	Radial or snap-in typesIEC 60384-4
Case Height	11–50 mm	Radial or snap-in typesIEC 60384-4
Pitch (Lead Spacing)	2.5–10 mm	Radial lead typeIEC 60384-4
Capacitance Tolerance	±20 %	Standard grade; ±10% availableIEC 60384-4
Surge Voltage	1.1× rated V	For 30 seconds at 85°CIEC 60384-4
Low Temperature Impedance	≤10× at -40°C ratio	Relative to 20°C valueIEC 60384-4

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

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Aluminum Electrolytic Capacitor.

Published Manufacturer Relationships

Source-reviewed profile relationships currently associated with Aluminum Electrolytic Capacitor

No source-reviewed manufacturer relationship is currently published for this product.

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Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

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Manufacturing capability

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Inspection readiness

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Supplier transparency

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Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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