Bevenbi Unveils 2026 Full Series Foil Oil-Immersed Capacitors: Capacitance Breakthrough from 10uF to 68uF

Bevenbi 2026 Foil Oil-Immersed Capacitors | Copper, Aluminum & Tin Foil Series | Up to 68μF

Bevenbi launches 2026 full series foil oil-immersed capacitors — FOC copper foil Oil, FOA aluminum foil oil& FOT tin foil oil. Joint R&D with Beijing Institute of Technology breaks the 10μF barrier, now up to 68μF. OEM & ODM available.

#foil oil-immersed capacitor, #copper foil capacitor, #aluminum foil capacitor, #tin foil capacitor #MKP capacitor alternative, #high capacitance foil capacitor, #audio grade capacitor, #OEM capacitor manufacturer。

Breaking the 10μF Barrier: A New Era for Foil Oil-Immersed Capacitors

Bevenbi, a leading manufacturer of high-performance foil oil-immersed capacitors, proudly launches its upgraded 2026 full product lineup covering copper foil oil-immersed, aluminum foil oil-immersed, and tin foil oil-immersed capacitors. This release represents a landmark technological breakthrough, expanding the maximum capacitance of foil-type capacitors from the industry’s long-standing 10μF limit up to 68μF.

Why Capacitance Has Been the Bottleneck

Since Bevenbi first introduced foil-type capacitors in 2023, the industry has faced a fundamental structural challenge. Unlike standard MKP metallized film capacitors, foil oil-immersed capacitors use solid metal foil electrodes rather than vacuum-deposited thin films. This construction delivers superior electrical performance — ultra-low ESR, high current handling, and minimal signal distortion — but comes at a physical cost: at the same capacitance value, foil capacitors are significantly larger than MKP equivalents.

Constrained by raw material properties and conventional winding technology, early foil capacitor products were limited to below 10μF, restricting their use in many high-capacitance applications where engineers preferred the sonic and electrical advantages of foil construction.

Joint R&D with Beijing Institute of Technology Delivers the Breakthrough

To overcome this technical barrier, Bevenbi’s engineering team launched a multi-year collaborative

R&D program partnering with:

• Upstream raw material suppliers for customized dielectric film formulations

• Materials Research Center of Beijing Institute of Technology for advanced material science research。

The joint effort focused on three core areas: dielectric film material modification, optimized foil winding geometry, and upgraded vacuum oil impregnation processes. After extensive material iteration and rigorous reliability testing, Bevenbi achieved two flagship breakthroughs:

The complete range now spans from 0.01μF to 68μF, providing a full-spectrum specification matrix for diverse application requirements.

Precision Manufacturing: Automated Equipment + Handcrafted Quality

Bevenbi maintains full in-house production control for its foil oil-immersed capacitor lines:

• Foil capacitor winding machines — ensure consistent winding tension and electrode alignment

• Vacuum oil impregnation equipment — guarantees complete, bubble-free oil saturation for maximum dielectric performance

• Handcrafted assembly & testing — all subsequent core assembly, insulation packaging, performance screening, and aging tests are performed by skilled craftsmen, delivering meticulous quality control that automated lines cannot match

This hybrid approach combines the repeatability of precision machinery with the fine-tuning of hand workmanship — essential for high-fidelity audio and high-reliability industrial applications.

Applications: Who Benefits from the New Capacitance Range?

The expanded capacitance range opens foil oil-immersed capacitor technology to applications previously forced to use MKP alternatives:

• High-end audio crossovers & power supplies — preserve foil-level sonic linearity at higher capacitance values

• Industrial power drives & inverters — high current handling with low ESR

• Test & measurement instrumentation — stable, low-distortion signal paths

• Custom power circuit systems — flexible specification selection from 0.01μF to 68μF

OEM & ODM Customization for Global Partners

Bevenbi welcomes global audio brands, industrial electronics manufacturers, and distributors to collaborate on OEM and ODM customization. Full datasheets for the FOT, FOC, and FOA series are available for download on the Bevenbi official website. Sample testing, technical parameter consultation, and bulk order inquiries are all supported.

“Our joint research with Beijing Institute of Technology redefined the material matching between metal foil and dielectric oil film. This breakthrough doesn’t just expand our product line — it gives engineers worldwide the freedom to choose foil oil-immersed capacitors without being trapped by capacitance limits.” — Bevenbi Technical Director

About Bevenbi

Bevenbi specializes in high-end film and foil capacitors, integrating independent R&D, precision manufacturing, and one-stop custom service. With product lines covering foil oil-immersed capacitors, MKP capacitors, and audio-grade polypropylene film capacitors, Bevenbi serves clients across Europe, Southeast Asia, North America, and global markets with stable, cost-effective passive component solutions.

 official web: www.bevenbi.com