RMCF0402FT240R
Miniature 240 ohm thick film resistors for surface-mount electronics
Manufacturer： stackpole
series introduction
# Introduction to the RMCF0402FT240R Product Series
## 1. Overview
The RMCF0402FT240R product series belongs to the realm of high - precision electronic components, specifically surface - mount resistors. These resistors are designed to meet the demanding requirements of modern electronic circuits, offering a combination of reliability, accuracy, and compactness. The "0402" in the model number refers to the industry - standard package size, which is 0.04 inches by 0.02 inches (or approximately 1.0mm x 0.5mm), making them ideal for use in densely populated printed circuit boards (PCBs).
## 2. Key Features
### 2.1 Resistance Value
The "240R" in the model indicates a resistance value of 240 ohms. This specific resistance value is carefully calibrated during the manufacturing process to ensure high precision. The tolerance of the RMCF0402FT240R resistors is typically very low, often within ±1% or even ±0.1% in some high - end versions. This high precision is crucial in applications where accurate voltage division, current limiting, or signal attenuation is required.
### 2.2 Power Rating
These resistors are designed to handle a certain amount of power. The power rating of the RMCF0402FT240R series is usually in the range of 0.063W to 0.1W, depending on the specific variant. This power - handling capacity allows them to be used in a wide variety of circuits, from low - power signal processing circuits to moderately powered power supply and control circuits.
### 2.3 Temperature Coefficient
The temperature coefficient of resistance (TCR) is an important parameter for resistors. The RMCF0402FT240R series typically has a low TCR, often in the range of ±100ppm/°C to ±25ppm/°C. A low TCR means that the resistance value of the resistor changes very little with temperature variations. This is essential in applications where the performance of the circuit needs to be stable over a wide temperature range, such as in automotive electronics, industrial control systems, and aerospace applications.
### 2.4 Frequency Response
The RMCF0402FT240R resistors offer excellent frequency response characteristics. They can operate effectively at high frequencies, with minimal parasitic effects such as inductance and capacitance. This makes them suitable for use in high - speed digital circuits, radio frequency (RF) circuits, and microwave applications.
## 3. Construction and Materials
### 3.1 Substrate
The resistive element of the RMCF0402FT240R is typically deposited on a ceramic substrate. Ceramic substrates offer several advantages, including high mechanical strength, good thermal conductivity, and excellent electrical insulation properties. The ceramic substrate helps to dissipate heat generated by the resistor during operation, ensuring stable performance and long - term reliability.
### 3.2 Resistive Material
The resistive material used in these resistors is carefully selected to achieve the desired resistance value and performance characteristics. It is often a thin - film or thick - film material. Thin - film resistors offer higher precision and lower TCR, while thick - film resistors are more cost - effective. The RMCF0402FT240R series may use either type of resistive material, depending on the specific application requirements.
### 3.3 Terminations
The terminations of the RMCF0402FT240R resistors are made of a metal alloy, usually a combination of tin, lead, and other metals. These terminations provide
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