RUBYCON's New MF Series with PMLCAP Technology

Advanced Capacitor Technology
RUBYCON presents the innovative MF Series, based on advanced PMLCAP technology (Polymer Multi-Layer Capacitor). These capacitors provide a highly reliable alternative to MLCCs across a wide range of applications – particularly in compact audio devices, sensors, and portable electronics where high noise resistance and stable electrical performance are essential.
SamplesTechnical Fundamentals of PMLCAP Technology
PMLCAP stands for Polymer Multi-Layer Capacitor – an advanced multilayer technology that has already proven its value in high-end audio applications such as DC decoupling and low-pass filters (LPFs). Its outstanding electrical properties even qualified it for use in the seismometer of NASA's "InSight" Mars mission.
Key Advantages of PMLCAPs
- No piezoelectric effect
- No change in DC bias capacitance
- Extremely low Coulomb forces prevent electrical distortion and potential acoustic noise
- High safety: no risk of short circuit, smoke, or fire due to cracks or bending of the PCB
- Wide operating temperature range up to +125 °C
- Low-voltage PMLCAPs can replace MLCCs in noise-sensitive applications
- High-voltage PMLCAPs can replace film capacitors at nearly half the size
Explore more about CODICO’s PMLCAPs.

MF Series
RUBYCON has introduced the new MF series, a further development of the proven MU series. It offers a capacity increase of 40 to 210% - with the same size.
- Capacitance Range: 0.033 to 4.7μF
- Rated Voltage: 16-63V
- Operating Temperature Range: -55°C to +105°C
By optimizing the internal structure – specifically by increasing the capacitance-related surface area and adjusting the polymer layer thickness – the MF series achieves high capacitance in a compact form factor.

Typical Use Cases for PMLCAP-Based Capacitors
- Small size audio equipment
- Sensor circuits
- RF circuits and PLL synthesizers
- Industrial and medical wearable devices and other small electronic devices
Why Is RUBYCON’s MF Series with PMLCAP Technology a Reliable Alternative to MLCCs?
The new MF Series from RUBYCON combines proven PMLCAP multilayer technology with significant capacity increases and compact dimensions, making it a powerful replacement for MLCCs. The components offer high noise immunity, stable performance across temperatures, and exceptional mechanical safety. This makes them particularly well-suited for applications like compact audio devices, RF circuits, sensor systems, and wearable electronics in industrial and medical environments.
Your Contact Person
Interested in using RUBYCON’s MF series in your design? Contact Yasunobu Ikuno for details.
