Film capacitors for electronic equipment use
High safety and long life thanks to a built-in fuse function
The damage caused by over-voltages on non-fused material is far more extensive than that suffered by fused material. Therefore Panasonic's film capacitors are the ideal solution for high stress applications.
Comparison between general and patterned metallization:
- Small break down
- Short circuit mode with risk of smoking or burning out
- Fuse function isolates the failed cell, and finally leads to open circuit
- Failed cell is isolated
Panasonic’s In-house technology: Patterned metallized polypropylene film capacitors
On a very thin layer of vapor deposited aluminum, segments are made within capacitor’s dielectric material.
Those segments localize the failure caused by over voltage, therefore the damage is only limited in a few section of the capacitor.
When too many of the areas fail in a very short period of time, capacitor will then open in a safe manner.
A demonstration video is available for your to take a look (see right side):
- We first apply high voltage to a dielectric material with Panasonic fuse pattern.
- Then we apply the same voltage to the raw material without fuse pattern.
- As you can easily recognize, the damage caused on non-fuse material is far more extensive than that of a fuse material.
Thanks to this “Fuse Function” technology, Panasonic film capacitors are ideal solution for high-stress applications that require high safety and high reliability,
such as automotive applications (OBC, DC/DC converters, inverters for xEV etc.), industrial power supplies, solar inverters etc.
Download our promotion documents
| Name | File type | Size | Date | Language |
|---|---|---|---|---|
| Products Catalog (Film Capacitors) | Catalog | 18 MB | 08.11.2023 | English |
| Panasonic - Film capacitor - Selection tool | Software, Support Tools | 2 MB | 29.10.2024 | English |
A typical circuit for audio systems
Surface Mount SMD film (chip) type capacitors are ideal for coupling for DC cutting of amplifiers and output filtering of class D amplifiers.
Product line-up
ECHU type construction
A Number of layers
approx. 400 ~ 1500
B Element composition
Dielectric : PPS film
Inner electrode: deposited aluminum
C Outer electrode composition
- First layer: brass
- Middle layer: conductive paste
- Third layer: solder plating (Pb-free)
Comparison with other technologies
The higher precision, better stability and lower distortion of Panasonic's chip type film capacitors contribute to producing a good sound.
Features
| Capacitor technology | Dielectric | Dielectric constant | Capacitance tolerance | Dissipation factor (1kHz) | Dielectric absorption |
|---|---|---|---|---|---|
| Panasonic film capacitor (ECHUX) | PPS | 3.0 | +/- 2% | 0.03% | 0.05% |
| Other film capacitor (PMLCAP) | Polymer | 3.0 | +/- 5% | 1.0% | 1.0% |
| MLCC C0G | TiO2／CaZrO3 | 20 ~ 300 | +/- 5% | 0.003% | 0.6% |
| MLCC X7R | BaTiO3 | 1000 ~ 20000 | +/- 10% | 0.8% | 2.5% |
| Item (see below gallery for more details) | Panasonic film | Other film | MLCC C0G | MLCC X7R |
|---|---|---|---|---|
| 1. Temperature characteristics | Good | Not good | Good | Not good |
| 2. Frequency characteristics | Good | Not good | Good | Not good |
| 3. Piezoelectric effect | Good | Good | Good | Not good |
| 4. THD (Third Harmonic Distortion) | Good | Good | Not good | Not good |
Main applications
- ECHU type: an ideal solution for an audio phase compensation circuit
- ECPU type: an ideal solution for an audio coupling circuit (analog amplifier)
- ECHU type: an ideal solution for audio noise filtering (headphone driver circuit)
