NTC0805J2
0805 SMD NTC thermistors for temperature compensation, 5% tolerance
Manufacturer： tyco
series introduction
# Introduction to the NTC0805J2 Product Series
## 1. Overview
The NTC0805J2 product series belongs to the category of Negative Temperature Coefficient (NTC) thermistors. These thermistors are crucial components in various electronic circuits, offering precise temperature sensing and compensation capabilities. The "0805" in the series name refers to the industry - standard surface - mount package size, which is 0.08 inches by 0.05 inches (equivalent to 2.0mm x 1.25mm), making them suitable for a wide range of printed circuit board (PCB) designs. The "J2" likely represents specific electrical characteristics or a particular variant within the series.
## 2. Physical Characteristics
### Package
- **Size**: The 0805 package is a compact and widely used surface - mount package. Its small size allows for high - density PCB layouts, enabling designers to fit more components on a single board. This is especially beneficial in modern electronic devices where miniaturization is a key trend.
- **Shape**: It has a rectangular shape with metal terminations on either end. These terminations provide a reliable electrical connection to the PCB when soldered.
- **Material**: The body of the NTC thermistor is typically made of a ceramic material with a high - temperature stability. The metal terminations are usually made of a conductive alloy that offers good solderability and electrical conductivity.
### Environmental Resistance
- **Temperature Range**: The NTC0805J2 series is designed to operate within a wide temperature range. It can typically withstand temperatures from - 40°C to 125°C, making it suitable for use in both indoor and outdoor environments.
- **Humidity Resistance**: These thermistors are engineered to resist the effects of humidity. They can maintain their electrical performance even in high - humidity environments, which is important for applications in areas with variable weather conditions or in devices that may be exposed to moisture.
## 3. Electrical Characteristics
### Resistance - Temperature Relationship
- **Negative Temperature Coefficient**: As an NTC thermistor, the resistance of the NTC0805J2 decreases as the temperature increases. This characteristic is described by a well - defined curve, which is typically provided in the product datasheet. The relationship between resistance and temperature is non - linear, but it can be accurately modeled using mathematical equations such as the Steinhart - Hart equation.
- **Nominal Resistance**: The series has a specified nominal resistance value at a reference temperature (usually 25°C). This value is carefully controlled during the manufacturing process to ensure consistency across different units. For example, a common nominal resistance value for the NTC0805J2 series might be 10 kΩ at 25°C.
### Tolerance
- **Resistance Tolerance**: The NTC0805J2 series offers a relatively tight resistance tolerance. A typical tolerance value might be ±5% or ±1%. This means that the actual resistance of a thermistor at the reference temperature will be within the specified percentage of the nominal resistance value. A tight tolerance is important for applications that require high - precision temperature sensing.
### Beta Value
- **Definition and Significance**: The beta value (β) is a parameter that characterizes the temperature coefficient of the NTC thermistor. It is defined as the ratio of the natural logarithm of the resistance at two different temperatures. A higher beta value indicates a more rapid change in resistance with temperature, which can be advantageous for applications that require high - sensitivity temperature sensing. The NTC0805J2 series has a specific beta value that is optimized for its intended applications.
## 4. Applications
### Temperature Sensing
- **Consumer Electronics**: In smartphones, tablets, and laptops
Images for reference
Image Preview
Image Preview
Image Preview