High Temperature Film Capacitor for Automotive

Murata's high temperature resistance film capacitors (FH series) can be continuously used at a temperature of 125°C.
In addition, they possess a self healing feature in a high‐temperature range which is optimally suited to industrial equipment requiring a high temperature guarantee, converters in environmentally-friendly vehicles, and inverter smoothing applications for motor drives.

For Automotive
Industrial equipment

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Features

Currently, film capacitors commonly used for automotive applications are generally guaranteed up to 105°C. Murata has recently developed a new high heat resistant film material. Using this material, we commercialize a high heat resistance film capacitor that can be used continuously at 125°C with Shizuki Electronic Co., Inc. Although there was a high heat resistance film capacitor in the past, there was a concern that the self-healing function is hard to work at high temperature and short-circuit failure may result. On the other hand, the product has a self-healing function in high temperature range.

Conventional film capacitors

Guarantee 105°C continuous or less in general (PP)
Very limited functional self-healing at high temperature ranges, leading to a short mode failure (PPS and PEN)

High temperature capacitors (New Products)

Enable to use at 125°C continuous
Functional self-healing at high temperature ranges, leading to an open mode failure

Film Capacitor Fundamentals

Characteristics

The developed film features a "high temperature resistance" and a "high εr."
In contrast to conventional PP and other thermoplastic resins, the developed film uses a thermoplastic resin which was custom developed by Murata. Therefore, the film achieves a high temperature resistance and a high εr to realize capacitors with a high temperature resistance and a compact size.