TDK introduces compact double-sided metallized polypropylene film capacitors for resonant topologies

August 5, 2025

TDK Corporation (TSE:6762) presents its new EPCOS B3264xH series of double-sided metallized polypropylene film capacitors (MMKP). These components are designed to meet the demands of high-frequency applications with high pulse stress of up to 6,500 V/µs, where traditional solutions may fall short. They excel in resonant circuits, particularly the popular LLC topology. Due to their compact form factor and AEC-Q200 compliance, these components are generally used in onboard chargers (OBCs) and DC-DC converters in xEVs, as well as in uninterruptible power supplies (UPS), industrial switch-mode power supplies (SMPS), and electronic ballasts.

These capacitors offer a rated DC voltage range from 630 V to 2000 V and cover capacitance values from 2.2 µF up to 470 µF. They are engineered with a special dielectric system combining polypropylene and double-sided metallized PET film, delivering high pulse strength and exceptional current handling capabilities. Rated for continuous operation from -55 °C to +125 °C, the series ensures long-term reliability even under harsh environmental conditions.

The B3264xH capacitors stand out with their high insulation resistance, low dissipation factor, and robust self-healing properties, resulting in a service life of 200,000 hours at +85 °C and full rated voltage. These components are available in three lead spacing variants (10 mm, 15 mm, and 22.5 mm), enabling flexible integration into space-constrained circuit layouts.

By combining high performance with automotive-grade reliability, TDK’s B3264xH series helps designers optimize efficiency and longevity in advanced power electronics systems across both automotive and industrial sectors.

Main applications

• Electronic ballasts (resonant circuits)
• LLC topology
• High-frequency applications with high current stress
• Switch-mode power supplies

Main features and benefits

• Very compact design
• High pulse strength
• High current withstand capability
• Usable in harsh, humid environments
• Halogen-free (upon request)
• AEC-Q200 compliant