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JDPD8W180400C
The resistance value of a resistor is determined by its material, dimensions, and structure. The resistivity (ρ) of the resistor’s material is an intrinsic property, while the geometric dimensions of the resistor—such as its length and cross-sectional area—are calculated using the formula R = ρ × (L/A), where L represents the length of the resistor and A represents its cross-sectional area.
- Commodity name： JDPD8W180400C
- 路数： 16
- 起始频率： 10
- 终止频率（GHz）： 70
- 插损dB： 3
- 连接形式： N
- 功率： 40
- Description
- Parameter Introduction
- Precautions
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I. Basic Principles of Resistance
II. Classification of Resistors
By materialCarbon film resistor Made primarily from carbon powder, it has low cost and good stability, but relatively lower precision, making it commonly used in ordinary circuits.Metal film resistor Made from metal oxides, it features high precision and excellent stability, making it suitable for high-precision circuits.Wire-wound resistor Made by winding metal wires, they offer a wide range of resistance values and high power ratings, but are relatively large in size and commonly used in high-power circuits.Ceramic resistor Based on ceramic materials, it features high thermal resistance and excellent stability, making it suitable for high-temperature environments.Thin-film resistor A thin film is formed on the substrate using vacuum deposition technology, which offers high precision and a small footprint, making it commonly used in precision circuits.By functionFixed resistor Its resistance value is fixed and unchanging, making it the most common type of resistor.Variable resistor The resistance value can be adjusted mechanically or electrically, for example, using potentiometers or rheostats. These are commonly used for signal conditioning and impedance matching.Special-function resistor Such components—like thermistors (whose resistance varies with temperature), photoresistors (whose resistance varies with light intensity), and varistors (whose resistance varies with voltage)—are used in sensors and protective circuits. -
Methods for Identifying Resistors
Four-color ring marking method The first two rings represent the first two digits of the resistance value, the third ring indicates the multiplier (a power of 10), and the fourth ring denotes the tolerance range.Five-color ring marking method The first three rings indicate the first three digits of the resistance value, the fourth ring indicates the multiplier, and the fifth ring indicates the tolerance range.Direct labeling method Directly mark the resistance value and tolerance range on the resistor surface, such as “100Ω ±5%”.Applications of resistors
Current Limitation By connecting a resistor in series, the current is limited to protect other components in the circuit, such as an LED current limiter.Voltage distribution Voltage division is achieved through a resistor voltage divider network, which is commonly used in power supply circuits and signal processing.Signal attenuation In signal transmission, signal attenuation is achieved through resistors to prevent the signal from becoming too strong.Temperature compensation Utilize the characteristics of thermistors to achieve temperature compensation.Impedance matching By adjusting the circuit impedance through a variable resistor, signal transmission efficiency is improved. -
Considerations for Resistor Selection
Resistance range Select the appropriate resistance value according to the circuit requirements.Accuracy requirements High-precision circuits require the selection of metal-film resistors or thin-film resistors.Power capacity Select the appropriate power rating based on the current in the circuit to avoid damage from overload.Temperature coefficient For temperature-sensitive circuits, resistors with a low temperature coefficient should be selected.Package form Select the appropriate package—such as surface-mount device (SMD) resistors or through-hole technology (THT) resistors—based on the PCB space and mounting method.
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Dongguan Liangrui Group
Tel: +86-18038246588
Tel: +86-13537305053
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Website: www.rico-electronic.net
Email: sales@rico-electronic.net
Address: Room 1101, Building 1, Unit 6, Shidai Zhihui, Luwu Village, Changping Town, Dongguan City, Guangdong Province
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