LQH43MN102J03 Series

series introduction

# Introduction to the LQH43MN102J03 Product Series

## 1. Overview
The LQH43MN102J03 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 devices.

## 2. Product Specifications

### Electrical Characteristics
- **Inductance Value**: The "102" 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 LQH43MN102J03 is \(10\times10^{2}\space\mu H = 1000\space\mu H\) or \(1\space mH\).
- **Tolerance**: The "J" represents a tolerance of ±5%. This means that the actual inductance of the inductor can vary within the range of \(1000\times(1 - 0.05)\space\mu H\) to \(1000\times(1 + 0.05)\space\mu H\), i.e., from \(950\space\mu H\) to \(1050\space\mu H\).
- **DC Resistance (DCR)**: It has a relatively low DC resistance. A low DCR is important as it reduces power losses in the form of heat when direct current passes through the inductor. This helps in improving the overall efficiency of the circuit.
- **Saturation Current (\(I_{sat}\))**: The saturation current is the maximum current at which the inductance of the inductor starts to drop significantly. For the LQH43MN102J03, it is specified to handle a certain level of saturation current, which is crucial in applications where high - current handling is required.

### Physical Characteristics
- **Size and Dimensions**: The "43" in the model number may be related to its physical size code. It is designed to have a compact form factor, which is beneficial for printed circuit board (PCB) layout, especially in applications where space is limited, such as in mobile devices, wearables, and small - sized consumer electronics.
- **Package Type**: It comes in a suitable package that provides mechanical protection and ease of mounting on the PCB. The package is designed to ensure good thermal dissipation, which helps in maintaining the inductor's performance under normal operating conditions.

## 3. Performance Advantages

### High - Frequency Performance
- The LQH43MN102J03 is optimized for high - frequency applications. It has a low equivalent series resistance (ESR) at high frequencies, which means it can efficiently store and release energy in high - frequency circuits. This makes it suitable for use in radio frequency (RF) circuits, such as in wireless communication devices, where it can help in filtering and impedance matching.
- It also has a high self - resonant frequency (SRF). The SRF is the frequency at which the inductor's inductive reactance is equal to its capacitive reactance. A high SRF allows the inductor to maintain its inductive behavior over a wider frequency range, enabling it to perform effectively in high - frequency circuits.

### Stability
- The inductor offers excellent stability over a wide range of temperatures and environmental conditions. It has a low temperature coefficient of inductance, which means that its inductance value changes very little with temperature variations. This stability is essential in applications where consistent performance is required, such as in precision measurement equipment and automotive electronics.

## 4. Application Areas

### Power Supply Cir

Images for reference

LQH43 Series

LQH43M Series Side 1

LQH43M Series Bottom

Datasheets

Partlist

LQH43MN102J03L

LQH43MN102J03L/BKN