Editorial Technical Reference

Surface Mount Capacitor

This page explains how Surface Mount Capacitor is classified within Electronic Component Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A surface mount capacitor is a fundamental electronic component used for energy storage, filtering, coupling, and decoupling in electronic circuits.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Surface Mount Capacitor

Definition
A surface mount capacitor is a fundamental electronic component used for energy storage, filtering, coupling, and decoupling in electronic circuits. It consists of two conductive plates separated by a dielectric material, manufactured in standardized SMD packages for automated assembly. These components are essential for stabilizing power supplies, reducing noise, and timing applications across consumer electronics, industrial controls, and automotive systems. They are sold as discrete components to electronics manufacturers for integration into printed circuit board assemblies.

Typical parameters for this component category include capacitance values ranging from 1 to 100 microfarads, rated voltages from 6.3 to 100 volts, and package sizes from 0402 to 1210 (EIA-535). Tolerance ranges from ±5% to ±20%, and temperature coefficients vary from ±30 ppm/°C to ±15% (IEC 60384). Dissipation factor is ≤0.1% at 1 kHz and 25°C, insulation resistance is ≥10000 MΩ at rated voltage and 25°C, and dielectric withstanding voltage is 2.5 times rated voltage for 1 minute (IEC 60384). Operating temperature range is -55°C to 125°C, rated humidity is 85% RH steady state at 85°C for 1000 hours (IEC 60068-2-78), and weight depends on package size, typically 0.001 to 0.01 grams.

Materials on file include ceramic dielectric, nickel electrode, tin plating, and epoxy resin. These values are reference ranges for the product category and must be verified for the specific model and application with the legal manufacturer or supplier. Standards listed are procurement references and do not imply certification or compliance of any particular product.
Working Principle
A surface mount capacitor stores electrical energy in an electric field between two conductive plates separated by a dielectric material. When a voltage is applied across the plates, positive and negative charges accumulate on opposite plates, creating an electric field in the dielectric. The capacitance value determines how much charge can be stored per unit voltage. In circuits, capacitors smooth voltage fluctuations, filter out noise, and couple or decouple signals. The dielectric material's properties, such as permittivity and temperature stability, influence the capacitor's performance. The component operates passively, meaning it does not require an external power source to function. Its behavior is governed by the fundamental relationship Q = CV, where Q is charge, C is capacitance, and V is voltage. The stored energy is released when the voltage across the capacitor changes, making it useful for timing and energy storage applications.
Common Materials
ceramic dielectric, nickel electrode, tin plating, epoxy resin
Technical Parameters
ParameterTypical rangeNotes & selection driver
CapacitanceRequired1–100 FNominal capacitance value
Rated VoltageRequired6.3–100 VMaximum working voltage
Package SizeRequired0402–1210 mmSMD package dimensionsEIA-535
ToleranceRequired±5–±20 %Capacitance accuracy
Temperature Coefficient±30–±15% ppm/°CCapacitance change with temperatureIEC 60384
Dissipation Factor≤0.1 %At 1 kHz, 25°CIEC 60384
Insulation Resistance≥10000 At rated voltage, 25°CIEC 60384
Dielectric Withstanding Voltage2.5× rated V DCNo breakdown for 1 minuteIEC 60384
Operating Temperature Range-55–125 °CFull rated voltage
Rated Humidity85 % RHSteady state, 85°C, 1000hIEC 60068-2-78
Weight0.001–0.01 gDepends on package size

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

Components / BOM

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Surface Mount Capacitor.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
voltage: Rated voltage (e.g., 6.3V to 100V DC), derating above 70°C
frequency: Up to several GHz (depends on capacitance and ESR)
other spec: Capacitance tolerance: ±5% to ±20%, ESR < 100mΩ (typical)
temperature: -55°C to +125°C (standard), up to +150°C (high-temp variants)
Media Compatibility
✓ Printed Circuit Board (PCB) assembly ✓ Low-voltage DC power supplies ✓ High-frequency RF circuits
Unsuitable: High-vibration mechanical environments without additional securing
Sizing Data Required
  • Required capacitance (e.g., 1µF)
  • Maximum operating voltage (e.g., 16V DC)
  • Package size constraint (e.g., 0603 metric)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Thermal Stress Cracking
Cause: Rapid temperature cycling or excessive soldering heat causing ceramic substrate fractures due to coefficient of thermal expansion mismatch between materials
Electrochemical Migration
Cause: Moisture ingress combined with DC bias creating conductive dendrite growth between electrodes, leading to short circuits
Maintenance Indicators
  • Visible bulging or cracking of capacitor body indicating internal pressure buildup or mechanical stress
  • Audible high-frequency buzzing or hissing during operation suggesting internal arcing or dielectric breakdown
Engineering Tips
  • Implement controlled soldering profiles with gradual ramp-up/cool-down rates to minimize thermal shock during assembly
  • Apply conformal coating to board assemblies in humid environments to prevent moisture absorption and electrochemical reactions

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 60384-1 Fixed capacitors for use in electronic equipment IPC-A-610 Acceptability of Electronic Assemblies

Quoted from the published standard.

Manufacturing Precision
  • Capacitance: +/-10% (typical for general purpose)
  • Dimensions: +/-0.1mm (length/width), +/-0.05mm (height)
Quality Inspection
  • Electrical Testing (Capacitance, ESR, Leakage Current)
  • Visual Inspection (Termination Integrity, Marking Legibility, Surface Defects)

Manufacturers of Surface Mount Capacitor

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Nanjing AH Electronic Science & Technology Co., Ltd.
Guangdong, CN
Founded 2010over 150 staffover 8,000 square meters
ISO9001
Listed on the company's own website · profile compiled by CNFX from public sources

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

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
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Inspection readiness
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Frequently Asked Questions

What are the typical capacitance and voltage ranges for surface mount capacitors?

Typical capacitance values range from 1 to 100 microfarads, and rated voltages from 6.3 to 100 volts. These are reference ranges for the product category; actual values depend on the specific model and must be confirmed with the manufacturer.

What standards apply to surface mount capacitors?

Package sizes follow EIA-535, and electrical parameters such as temperature coefficient, dissipation factor, insulation resistance, and dielectric withstanding voltage are referenced in IEC 60384. Humidity testing is referenced in IEC 60068-2-78. These standards are procurement references and do not guarantee compliance of any specific product.

How do I verify the performance of a surface mount capacitor for my application?

Check the datasheet for the specific model and compare parameters like capacitance, rated voltage, tolerance, temperature coefficient, and operating temperature range against your circuit requirements. Also verify the package size and soldering profile. Always confirm with the legal manufacturer or supplier.

What are common failure modes of surface mount capacitors?

Common failure modes include capacitance drift, short circuits due to dielectric breakdown, open circuits from mechanical stress, and increased leakage current. These can be detected by measuring capacitance, insulation resistance, and dissipation factor. If values deviate from specifications, the component may be degraded.

Data Basis

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

Preliminary Technical Classification
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