Decoding Samsung's CL31A106KBHNNNE: A High-Capacitance, High-Voltage MLCC

In electronic circuit design, multilayer ceramic capacitors (MLCCs) are among the most common and critical passive components. Today, we examine a classic product from Samsung Electro-Mechanics-the CL31A106KBHNNNE, an MLCC that achieves an ingenious combination of high capacitance and high voltage withstand capability within a compact footprint.

Key Specifications at a Glance

The table below summarizes its critical parameters for quick reference.

Parameter	Specification
Brand	Samsung Electro-Mechanics
Capacitance	10µF
Rated Voltage	50V
Tolerance	±10%
Temperature Characteristic	X5R
Operating Temperature	-55℃ ~ +85℃
Package Size	1206 (3216 metric)
Mounting Type	Surface Mount (SMD)

The most outstanding feature of this capacitor is the **combination of 10µF capacitance and 50V voltage rating**. Within the 1206 package, 10µF represents a relatively high capacitance value, while the 50V rating enables it to readily handle filtering and decoupling requirements for most medium-to-low voltage power rails, such as 12V or 24V power systems. The X5R dielectric exhibits a capacitance variation of no more than ±15% across the -55℃ to +85℃ range, which is sufficient to cover the vast majority of industrial and consumer application scenarios.

Frequently Asked Questions (Q&A)

Q1: What is the difference between X5R and X7R dielectrics? Why choose X5R?

A: Both X5R and X7R belong to Class II ceramic capacitors. The core difference lies in the **upper operating temperature limit: X5R is rated at 85℃, whereas X7R reaches 125℃. If the application environment does not exceed 85℃ (e.g., consumer electronics, general industrial equipment), X5R fully meets the requirements and typically offers a cost advantage. For applications involving automotive electronics or high-temperature industrial environments, X7R or higher-grade capacitors should be considered.

Q2: What are the common application scenarios for the CL31A106KBHNNNE?

A: Based on its parameter characteristics, this capacitor is widely used in the following scenarios:
1. Power supply filtering and decoupling**: At the input or output of DC-DC converters, to smooth voltage ripple.
2. Consumer electronics: Power management circuits in smartphones, tablets, and laptops.
3. Communication equipment: Signal coupling and noise suppression in routers and base station modules.
4. General-purpose circuits: As energy storage or bypass capacitors, suitable for various PCB designs where space and reliability are priorities.

Advantages and Selection Tips

Samsung's MLCC product line is renowned for its high reliability and robust supply chain. This capacitor features a nickel barrier electrode structure, offering good anti-sulfuration capability and long-term reliability. In volume procurement, its cost advantage is also notable-for example, in 2,000-piece reel packaging, the unit price can be as low as approximately 0.59 RMB.

In summary, Samsung's CL31A106KBHNNNE is a general-purpose MLCC that achieves a well-balanced trade-off between capacitance, voltage withstand capability, size, and cost-making it a reliable choice for power and signal processing circuits.

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