LQH66SN103M03
Shielded wirewound power inductors with ferrite core for high-current applications
Manufacturer： murata
series introduction
# Introduction to the LQH66SN103M03 Product Series
## 1. Overview
The LQH66SN103M03 belongs to a high - performance inductor product series. Inductors are fundamental passive electronic components that play a crucial role in various electronic circuits, and this particular series is designed to meet the demanding requirements of modern electronic applications.
## 2. Key Specifications
### Inductance
The "103" in the model number indicates an inductance value. Using the standard inductor value coding system, where the first two digits are significant figures and the third is the multiplier, the inductance of the LQH66SN103M03 is 10 × 10³ nH, which is equivalent to 10 μH. This inductance value is carefully calibrated to provide the necessary magnetic field storage and energy transfer capabilities in circuits.
### Tolerance
The "M" in the model represents the tolerance of the inductor. In the industry - standard coding, "M" typically means a tolerance of ±20%. This indicates that the actual inductance value of the LQH66SN103M03 can vary within the range of 8 μH to 12 μH. The tolerance specification is important as it affects the performance and stability of the circuit in which the inductor is used.
### Current Rating
The product has a specific current rating, which is the maximum amount of current that the inductor can handle without significant degradation of its performance. This rating is determined by factors such as the wire gauge used in the inductor's winding and the core material. A proper current rating ensures that the inductor does not overheat or saturate under normal operating conditions, which could lead to circuit malfunctions.
### DC Resistance (DCR)
The DC resistance of the LQH66SN103M03 is another important parameter. It represents the resistance of the inductor's coil to direct current. A lower DCR is generally preferred as it reduces power losses in the form of heat generation. The DCR value is influenced by the length and cross - sectional area of the wire used in the winding, as well as the material's resistivity.
## 3. Construction and Design
### Core Material
The inductor uses a carefully selected core material. The core material affects the inductor's magnetic properties, such as permeability and saturation characteristics. A high - quality core material can enhance the inductor's performance by increasing its inductance and reducing losses. The specific core material used in the LQH66SN103M03 is chosen to provide a good balance between high inductance, low core losses, and temperature stability.
### Winding
The winding of the inductor is a critical aspect of its construction. The wire used for winding is typically made of copper due to its high electrical conductivity. The number of turns and the winding pattern are precisely engineered to achieve the desired inductance value. The winding is also designed to minimize parasitic capacitance, which can affect the inductor's performance at high frequencies.
### Package
The LQH66SN103M03 comes in a specific package that provides mechanical protection and facilitates easy mounting on printed circuit boards (PCBs). The package is designed to be compatible with standard surface - mount technology (SMT) processes, allowing for efficient and automated assembly. The package also helps to dissipate heat generated during operation, ensuring the long - term reliability of the inductor.
## 4. Applications
### Power Supply Circuits
In power supply circuits, the LQH66SN103M03 can be used as a filter inductor. It helps to smooth out the output voltage by storing and releasing energy in the magnetic field.
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