Introducing 1000V Rated Voltage MLCCs Recommended for 800VDC

  • Industrial
  • 2026.07.15

Abstract

As AI advances, the power consumption of AI chips is increasing rapidly, accelerating the adoption of 800VDC systems. At the same time, due to space constraints in power shelves, MLCC adoption is becoming increasingly active, drawing attention to MLCCs with rated voltages of 1000V or higher.

Capacitance & Voltage range, MLCC (C0G, X7*) vs Film Capacitor

 

Due to the rapid increase in AI computing demand, the power consumption of AI chips is rising significantly.
Currently, power consumption in AI systems reaches up to 1MW, resulting in massive power usage.
According to the power formula 𝐼=𝑃/𝑉, the higher the voltage (V), the lower the current (I).
As shown in the formula Q=𝐼^2 𝑅, lower current means losses caused by heat generation can be reduced.
In addition, the use of lower current can also reduce the amount of copper wire required.
Furthermore, reducing the number of voltage conversion stages lowers conversion losses and meets the need for miniaturization of power devices through the transition from AC-DC to DC-DC.

(C0G/X7*) Pros and Cons

Feature C0G X7*
Main Applications Snubber circuits,
Resonant converters,
High-precision filters		 Bypass,
Decoupling,
DC-Link smoothing
Pros Capacitance extremely stable,
Ultra-low heat generation (Low ESR)		 High capacitance in a small package
(High Volumetric Efficiency)
Cons Limited capacitance,
Large physical size		 Capacitance drop under
DC Voltage & Temperature

The greatest advantage of C0G is that it is not affected by DC-bias. Even when 800VDC voltage is applied, no capacitance drop occurs, and capacitance change due to temperature variation (-55°C~125°C) is also close to zero. In addition, its low dielectric loss (DF) value results in low self-heating. However, due to the low dielectric constant of C0G material, it is difficult to realize high capacitance. Currently, at 1000V, the maximum capacitance available in the 1210 inch size is 33nF.

▶ Part Number : CL32C333JIVNNW#

By contrast, the X7 series can realize high capacitance even in small sizes due to its high dielectric constant. However, it is significantly affected by DC-bias, causing capacitance to drop to approximately 30% of its initial value, and it is also affected by temperature changes. Therefore, it is important to check DC-bias and TCC values according to the operating voltage and temperature. Despite these characteristics, the X7 series is suitable for high-capacitance power stages, such as high-voltage input/output smoothing in DC-DC converters.

▶ Part Number : CL43B473KIURPJ#, CL55B104KIURPJ#

Samsung Electro-Mechanics is currently reviewing a 2220 inch size 470nF 1000V model and continues to promote next-generation product development in preparation for the adoption of 800VDC systems.

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