SRP4020-3R3M
Shielded wirewound power inductors for compact electronic circuits
Manufacturer： bourns
series introduction
# SRP4020 - 3R3M Product Series Introduction
## 1. Overview
The SRP4020 - 3R3M product series represents a cutting - edge line of power inductors engineered to meet the diverse and demanding requirements of modern electronic circuits. These inductors are designed with precision and advanced technology, offering high - performance solutions for a wide range of applications, from consumer electronics to industrial equipment.
## 2. Key Specifications
### Physical Dimensions
- The SRP4020 - 3R3M inductors feature a compact and standardized package size of 4.0mm x 2.0mm. This small form factor makes them ideal for use in space - constrained circuit boards, allowing for more efficient use of available space in electronic devices.
- They have a low profile, which is beneficial for applications where height restrictions are a concern, such as in thin - profile laptops, tablets, and mobile phones.
### Inductance Value
- The "3R3" in the model name indicates an inductance value of 3.3μH. This specific inductance value is carefully selected to provide optimal performance in various power management circuits, such as voltage regulators and DC - DC converters. It helps in filtering out unwanted electrical noise and stabilizing the power supply, ensuring a smooth and reliable flow of current.
### Tolerance
The inductors in the SRP4020 - 3R3M series typically have a tight tolerance, usually within ±20%. This high level of accuracy ensures consistent performance across different units, reducing the variability in circuit behavior and making it easier for designers to achieve the desired electrical characteristics in their applications.
### Saturation Current
- These inductors are designed to handle relatively high saturation currents. The saturation current is the maximum current at which the inductance value starts to drop significantly. For the SRP4020 - 3R3M series, the saturation current is carefully specified to meet the requirements of power - hungry applications. This allows the inductors to maintain their performance even under high - load conditions, preventing issues such as voltage drops and instability in the power supply.
### DC Resistance (DCR)
- The SRP4020 - 3R3M inductors have a low DC resistance. A low DCR is crucial as it minimizes power losses in the inductor, resulting in higher efficiency in the overall circuit. This is especially important in battery - powered devices, where reducing power consumption can significantly extend the battery life.
## 3. Construction and Materials
### Core Material
- The inductors use high - quality magnetic core materials. These materials are carefully selected for their excellent magnetic properties, such as high permeability and low core losses. The use of such materials helps in achieving high inductance values in a small physical size and also reduces the amount of energy dissipated as heat during operation.
- The core design is optimized to minimize electromagnetic interference (EMI), which is essential for maintaining the integrity of the electrical signals in the circuit and ensuring compliance with electromagnetic compatibility (EMC) standards.
### Winding
- The winding of the SRP4020 - 3R3M inductors is made of high - conductivity copper wire. The wire is wound precisely around the core to ensure consistent inductance values and low resistance. The winding process is carefully controlled to minimize the risk of short - circuits and other manufacturing defects, ensuring high reliability and quality of the inductors.
## 4. Applications
### Consumer Electronics
- In smartphones and tablets, the SRP4020 - 3R3M inductors are used in power management circuits to regulate the voltage supplied to various components, such as the processor, display, and memory. Their small size and high efficiency make them an ideal choice for these portable devices, where space and
Images for reference
SRP4020 Series