Square Radial Hybrid Wet Tantalum Capacitors

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Maximum Power Density in Space-Efficient Square Form Factors

Quantic Evans' square radial capacitor series delivers industry-leading power density in optimized square form factors. Our TDE, TDD, TDB, and THS3 series provide engineers with flexible mounting options and exceptional performance for demanding military, aerospace, and energy applications where space efficiency and reliability are paramount.

Product Series Specifications

TDE capacitors

TDE Series

High voltage performance

  • Form Factor: 1.4" x 1.4" square base (6 heights)

  • Voltage Range: 60V – 110V

  • Capacitance Range: 2.2mF – 37.5mF

  • Applications: High-voltage power conditioning, energy storage

TDD capacitors

TDD Series

High capacitance design

  • Form Factor: 1.4" x 1.4" square base (6 heights)

  • Voltage Range: 10V – 125V

  • Capacitance Range: 1.5mF – 360mF

  • Qualification: DLA 15010

  • Applications: Power hold-up, pulse power systems

THS3 capacitor

THS3 Series

Hybrid technology showcase

  • Advanced Configuration: Optimized hybrid wet tantalum design

  • Mission-Critical Applications: Defense and aerospace platforms

  • Custom Options: Tailored solutions available

TBD capacitors

TDB Series

Compact high performance

  • Form Factor: 1.0" x 1.0" square base (5 heights)

  • Voltage Range: 10V – 125V

  • Capacitance Range: 750µF – 150,000µF

  • Applications: Space-constrained high-energy applications

Core Applications & Markets

Defense & Military Systems

When mission failure is not an option, defense contractors rely on Quantic Evans square radial capacitors to deliver unwavering performance. Our capacitors power critical systems including MIL-STD-704 compliant power hold-up circuits that maintain system integrity during power fluctuations, ensuring operational readiness in combat scenarios. From radar transmit pulse applications that require instantaneous high-current delivery to sophisticated electronic warfare systems that demand precise power conditioning, our square radial series provides the reliability foundation that modern weapon systems depend on.

Aerospace & Space

In the unforgiving environment of space, every component must perform flawlessly for years without maintenance. Quantic Evans square radial capacitors enable breakthrough aerospace technologies, from satellite power management systems that efficiently distribute energy across complex spacecraft to electric propulsion systems that power the next generation of deep space missions. Whether supporting precision LIDAR systems for autonomous navigation or providing critical avionics power backup during emergency scenarios, our capacitors deliver the exceptional reliability that aerospace engineers demand.

Energy & Industrial

The energy sector's most challenging environments demand capacitors that can withstand extreme temperatures, shock, and vibration while maintaining peak performance. Our square radial series excels in oil and gas downhole equipment operating at depths exceeding 20,000 feet, where temperatures reach 200°C and pressures exceed 30,000 PSI. These same robust characteristics make our capacitors ideal for high-power energy storage systems in renewable energy installations and industrial power electronics that require consistent performance across demanding duty cycles.

Hybrid Technology Benefits

Superior Energy Storage

Our proprietary hybrid wet tantalum technology combines Ta₂O₅ dielectric anodes with RuO₂ cathodes, delivering:

  • Maximum capacitance in minimal volume

  • Ultra-low equivalent series resistance (ESR)

  • Exceptional pulse current capability

  • Extended operational life

Reliability Advantages

  • Hermetically sealed construction

  • Wide operating temperature range

  • Shock and vibration resistance

  • Space-grade qualification options

  • Unlimited cycle life

TDE Square Radial Capacitors

Square Form Factor Benefits

The square form factor delivers strategic advantages beyond simple geometry. Key benefits include:

  • Space Optimization: Efficient PCB layouts with higher component density while maintaining full functionality

  • Mechanical Reliability: Stable mounting under extreme vibration with multiple height options for precise capacity scaling

  • Integration Simplicity: Standard mounting hardware compatibility reduces development time and integration costs.

Custom Engineering Support

Our engineering team doesn't just supply capacitors — we deliver complete solutions tailored to your specific challenges.

Application Analysis

Comprehensive requirement assessment

Performance characteristic optimization

Thermal and electrical modeling

Custom Solutions

Specialized mounting configurations

Connector options for seamless integration

Qualification testing with rigorous protocols

Partnership Approach

From initial concept through final validation, our engineers work alongside your team to ensure optimal performance across all operating conditions.

 Quality & Certifications

 As a certified AS9100/ISO9001 manufacturer, Quantic Evans maintains the highest quality standards:

NASA-INST-002 space grade qualification

ESA approved components

MIL-STD testing capabilities

Comprehensive quality assurance programs


Learn more about Quantic Evans Quality and Certifications

Partner with the Power Density Leaders

Quantic Evans' square radial hybrid wet tantalum capacitors represent decades of innovation in advanced capacitor technology. Our solutions consistently deliver superior SWaP (Space, Weight, and Power) performance compared to traditional capacitor technologies.

Contact our technical sales team today to discuss your square radial capacitor requirements and discover how our solutions can optimize your system performance while meeting the most stringent reliability requirements.