RL0805FR-070R39L
Compact 0805 SMD resistors for current sensing applications
Manufacturer： yageo
series introduction
# RL0805FR - 070R39L Product Series Introduction
## 1. Overview
The RL0805FR - 070R39L product series belongs to the realm of electronic components, specifically resistors. These resistors are designed to meet a wide range of electrical and electronic circuit requirements with high precision and reliability. The "RL0805FR" is the product family identifier, while "07" indicates a specific power rating, "0R39" represents the resistance value, and "L" may denote certain additional characteristics or a specific variant within the series.
## 2. Physical Characteristics
### 2.1 Package Size
The "0805" in the product code refers to the industry - standard package size. In the metric system, an 0805 package has dimensions of approximately 2.0mm x 1.25mm. This relatively small size makes the RL0805FR - 070R39L resistors suitable for use in compact electronic devices where space is at a premium, such as mobile phones, tablets, and wearable devices.
### 2.2 Construction
These resistors are typically constructed using a thin - film technology. A thin layer of resistive material is deposited on a ceramic substrate. This construction method offers several advantages, including excellent temperature stability, low noise, and high precision. The ceramic substrate provides good mechanical support and electrical insulation, ensuring the long - term reliability of the resistor.
## 3. Electrical Characteristics
### 3.1 Resistance Value
The resistance value of the RL0805FR - 070R39L is 0.39 ohms (0R39). This low - resistance value makes it suitable for applications where precise current sensing or power management is required. For example, in power supply circuits, these resistors can be used to measure the current flowing through a particular branch of the circuit, allowing for accurate monitoring and control of power consumption.
### 3.2 Tolerance
The series offers a high - precision tolerance. Common tolerance values for this type of resistor can be as low as ±0.1%, ±0.5%, or ±1%. A tight tolerance ensures that the actual resistance value of the resistor closely matches the specified value, which is crucial in applications where accurate electrical performance is essential, such as in high - end audio equipment or precision measurement instruments.
### 3.3 Power Rating
The "07" in the product code indicates the power rating of the resistor. The power rating of the RL0805FR - 070R39L is typically designed to handle a certain amount of power dissipation without overheating. For this series, the power rating might be around 1/10 watt (0.1W). This power rating determines the maximum amount of power that the resistor can safely dissipate under normal operating conditions. It is important to select a resistor with an appropriate power rating to avoid damage due to excessive heat generation.
### 3.4 Temperature Coefficient of Resistance (TCR)
The TCR of the RL0805FR - 070R39L is relatively low. A low TCR means that the resistance value of the resistor changes minimally with temperature variations. This is important in applications where the operating temperature can fluctuate, such as in automotive electronics or industrial control systems. A stable resistance value over a wide temperature range ensures consistent performance of the circuit.
## 4. Applications
### 4.1 Power Management
In power supply circuits, the RL0805FR - 070R39L resistors can be used for current sensing. By measuring the voltage drop across the resistor, the current flowing through the circuit can be accurately determined.
Images for reference
0805 Chip Resistor, SMT
Thin Film Resistor Top
Thin Film Resistor Side