Examples of Problem Solving

Suggestions for replacing film capacitors with multilayer ceramic capacitors

As the capacity of multilayer ceramic capacitors increases, the number of cases in which multilayer ceramic capacitors are being used in areas that were previously unconsidered is also on the increase.

In the marketplace, we are seeing practical applications being promoted to improve the efficiency of mainly electric power converters as a result of higher frequencies being applied to switching elements and these elements being driven at higher temperatures. In addition, multilayer ceramic capacitors are being adopted more and more for their impedance characteristics at high frequencies and compatibility at high temperatures.
Another key point in their adoption is that downsizing and cost reductions can be achieved due to their compatibility with surface-mounted products.

These materials provide actual examples of the differences between film capacitors and multilayer ceramic capacitors, and how downsizing and cost reductions can be achieved.
Please do read our tips for increasing your design freedom.

 

SubTitleIcon6    Key reasons for recommending multilayer ceramic capacitors

1) Downsizing is possible
2) Compatibility with high-temperature, high-humidity environments
3) Surface-mounting compatibility

 

 

SubTitleIcon6    Comparison between film capacitors and multilayer ceramic capacitors

Comparison between film capacitors and multilayer ceramic capacitors


Downsizing

This table shows a comparison between multilayer ceramic capacitor and film capacitor products with the same voltage and capacity.
From this table, you can see that multilayer ceramic capacitors are considerably smaller.
Downsizing

Resistance to high-temperature environments and high humidity

With multilayer ceramic capacitors, 125°C is set as the standard guaranteed temperature.
Also, we have tested our products for humidity resistance in high 85% or 95% humidity environments in reliability tests.


Content guaranteed under standard temperature environments


Reliability items in high humidity environments for general multilayer ceramic capacitors


SubTitleIcon6    Advantages when multilayer ceramic capacitors are used


There are a number of advantages in choosing multilayer ceramic capacitors: Components can be downsized, substrates can be downsized as a result of the high degree of freedom in the layout of mounted components, and humidity exclusion measures can be reduced as a result of their outstanding humidity resistance.

Advantages when multilayer ceramic capacitors are used


SubTitleIcon6    Example of circuit used


Example of application: Air conditioner, general-purpose inverter, power converter

Example of circuit used


Snubber capacitors (C1) are required to have high-frequency noise removed.

Type Details of series
SMD KRM Series, Metal Terminal Type Multilayer Ceramic Capacitors for General Purpose
KR3 Series, High Effective Capacitance & High Ripple Current Metal Terminal Type Multilayer Ceramic Capacitors for General Purpose
Lead RDE Series, Lead Type Multilayer Ceramic Capacitors for General Purpose


Example of replacement with a multilayer ceramic capacitor (general-purpose inverter)

Lineup of ceramic capacitors



Why not consider multilayer ceramic capacitors?

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