INDUSTRY COMPONENT

Termination

Surface mount capacitor termination is the conductive end connection that provides electrical contact and mechanical attachment to printed circuit boards.

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Component Specifications

Definition
A termination in surface mount capacitors refers to the metallized electrode structure at each end of the capacitor body that enables electrical connection to circuit board pads through soldering. These terminations typically consist of multiple layers including inner electrode connection, barrier layer, and outer solderable finish, designed to ensure reliable electrical performance, thermal stability during reflow soldering, and mechanical integrity under thermal cycling and vibration conditions.
Working Principle
Terminations function by providing a low-resistance electrical path from the capacitor's internal electrodes to external circuit connections. The layered construction prevents diffusion between materials, maintains solder joint reliability through thermal expansion matching, and ensures consistent electrical characteristics across operating conditions.
Materials
Multi-layer structure: Nickel barrier layer (2-5μm), Tin-Lead or Lead-Free solder coating (SnAgCu, SnCu, or pure Tin, 3-8μm), Silver or Copper inner electrode connection. Base materials vary by capacitor type: Ceramic capacitors use silver-palladium or copper terminations, tantalum capacitors use manganese dioxide or conductive polymer with silver epoxy, aluminum electrolytic capacitors use aluminum foil with conductive adhesive.
Technical Parameters
  • Peel Strength ≥1.5N/mm
  • Solderability ≥95% coverage per IPC-J-STD-002
  • Termination Width 0.5mm to 3.2mm
  • Contact Resistance <10mΩ
  • Termination Length 0.8mm to 2.5mm
  • Thermal Shock Resistance -55°C to +125°C, 1000 cycles
Standards
IEC 60384, EIA-198, JIS C 5102, IPC-7351

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Termination.

SMD capacitor termination surface mount termination capacitor electrode solder termination electronic component termination PCB mounting reflow soldering Termination Termination in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Surface Mount Capacitor

Passive electronic component for energy storage and filtering in circuits

View Product Details

High-Frequency Ceramic Capacitor

Miniaturized capacitor using ceramic dielectric for high-frequency electronic circuits

View Product Details

Temperature Sensor Probe

A sensing element that directly measures temperature and converts it into an electrical signal for monitoring systems.

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Engineering Analysis

Risks & Mitigation
  • Solder joint cracking due to thermal expansion mismatch
  • Tin whisker growth in pure tin coatings
  • Delamination during reflow soldering
  • Corrosion in humid environments
  • Poor solderability from oxidation
FMEA Triads
Trigger: Insufficient barrier layer thickness
Failure: Diffusion between electrode and solder causing increased ESR
Mitigation: Maintain minimum 2μm nickel barrier layer with quality control verification
Trigger: Thermal expansion coefficient mismatch
Failure: Solder joint cracking during thermal cycling
Mitigation: Use termination materials with CTE matching to PCB substrate (13-18 ppm/°C)
Trigger: Poor solderability due to oxidation
Failure: Incomplete solder wetting leading to open circuits
Mitigation: Implement nitrogen atmosphere storage and use within 12 months of manufacturing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Termination position tolerance: ±0.1mm, Coplanarity: ≤0.1mm, Solder fillet height: 25-75% of termination thickness
Test Method
Visual inspection per IPC-A-610, Solderability testing per J-STD-002, Cross-section analysis for layer integrity, Thermal shock testing per MIL-STD-202 Method 107

Buyer Feedback

★★★★☆ 4.5 / 5.0 (39 reviews)

"Found 15+ suppliers for Termination on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Termination is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Computer, Electronic and Optical Product Manufacturing environments. No issues with the Termination so far."

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Frequently Asked Questions

What is the difference between lead-free and tin-lead terminations?

Lead-free terminations (typically SnAgCu) have higher melting points (217-227°C vs 183°C for SnPb), requiring higher reflow temperatures but offering better environmental compliance. Tin-lead provides superior solder joint formation and thermal fatigue resistance but is restricted in many applications due to RoHS regulations.

How do termination materials affect capacitor performance?

Termination materials directly impact ESR (Equivalent Series Resistance), current carrying capacity, and thermal performance. Silver terminations offer lowest ESR but higher cost, while copper provides good conductivity with better cost-effectiveness. Barrier layers prevent diffusion that could degrade electrical properties over time.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Surface Finish Termination Electrodes