Aluminum Electrolytic Capacitor Construction – TS13 & TS14 Series Overview

Basic Structure of Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors, commonly referred to as e-caps, utilize etched pure aluminum foil as the anode (+).
The etched surface increases effective surface area, enabling higher capacitance per unit volume.

A thin aluminum oxide layer is formed on the anode foil and serves as the dielectric.
The electrolyte, which covers the oxide layer, functions as the cathode (-).
This structure allows aluminum electrolytic capacitors to achieve relatively high capacitance compared with ceramic and plastic film capacitors of similar size.

Electrical Characteristics

• Capacitance range: 0.1 ?F to 2,700,000 ?F (2.7 F)
• Rated voltage range: 4V to 630V
• High capacitance per unit volume compared to ceramic and film capacitors

Aluminum electrolytic capacitors with non-solid electrolyte are widely used due to cost efficiency and broad electrical range.

Self-Healing and Lifetime Considerations

The liquid electrolyte supplies oxygen to reform the dielectric oxide layer, enabling a self-healing mechanism.
However, electrolyte evaporation may occur through temperature-dependent drying-out processes.
This can cause parameter drift and limit service life.

Production Flow Overview

The general production process of aluminum electrolytic capacitors includes:

• Aluminum foil preparation and etching
• Oxide layer formation
• Electrolyte impregnation
• Winding and assembly
• Sealing and finishing
• Electrical testing and inspection

Applications

• Power supply filtering
• Energy storage in DC circuits
• Industrial control systems
• Consumer electronic equipment

Design Considerations

• Select voltage rating with sufficient design margin.
• Consider operating temperature impact on lifetime.
• Evaluate capacitance requirement based on ripple and filtering needs.
• Review datasheet parameters before design integration.

Contact

For technical consultation regarding TS13 and TS14 series, please contact:
Email: sales@suntan.com.hk
Email: info@suntan.com.hk