CDV16FF681JO3F vs CDV16FF821JO3F
| Part Number |
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| Category | Mica and PTFE Capacitors | Mica and PTFE Capacitors |
| Manufacturer | Cornell Dubilier Electronics (CDE) | Cornell Dubilier Electronics (CDE) |
| Description | CAP MICA 680PF 5% 1KV RADIAL | CAP MICA 820PF 5% 1KV RADIAL |
| Package | Bulk | Bulk |
| Series | CDV16 | CDV16 |
| Features | RF, High Q, Low Loss | RF, High Q, Low Loss |
| Operating Temperature | -55°C ~ 150°C | -55°C ~ 150°C |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Radial | Radial |
| Tolerance | ±5% | ±5% |
| Size / Dimension | 0.461" L x 0.173" W (11.70mm x 4.40mm) | 0.461" L x 0.173" W (11.70mm x 4.40mm) |
| Voltage - Rated | 1 kV | 1 kV |
| Lead Spacing | 0.232\" (5.90mm) | 0.232\" (5.90mm) |
| Height - Seated (Max) | 0.500\" (12.70mm) | 0.500\" (12.70mm) |
| Capacitance | 680 pF | 820 pF |
| Dielectric Material | Mica | Mica |
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1. What is the difference between PTFE and mica?
PTFE (polytetrafluoroethylene) and mica have significant differences in material properties, application areas, advantages and disadvantages.
Material properties
1. PTFE:
Electrical properties: PTFE has extremely low dielectric constant and dielectric loss, and exhibits excellent electrical insulation properties. The fluorine atoms in its molecular structure provide good electrical inertness, making it perform well in high-frequency and microwave fields.
Temperature resistance: PTFE has excellent high temperature resistance, which can reach 260°C. Its chemical stability is extremely strong and it is resistant to almost all chemicals.
Mechanical properties: PTFE has a low friction coefficient and excellent lubrication properties. It is often used to manufacture seals, pipes, valves, etc.
2. Mica:
Electrical properties: Mica has low loss, high insulation resistance and good temperature stability, and is particularly suitable for high-frequency and high-voltage applications.
Temperature resistance: Mica has high temperature resistance, but it gradually loses its properties at high temperatures, and its performance usually decreases above 500°C.
Mechanical properties: The physical properties of mica make it perform well in high-frequency and high-voltage circuits, but it is relatively brittle and difficult to process. -
2. What is the equivalent of a mica capacitor?
Mica capacitors are equivalent to high-performance capacitors with high-frequency characteristics and high precision. Mica is a mineral that occurs naturally in rocks on the earth's surface. Mica is used as a dielectric for capacitors due to its excellent insulating properties. Mica capacitors usually have high inductance and resistance losses, which allows them to exhibit high-frequency characteristics. Their structure consists of a thin layer of mica layered on a thin silver sheet between two electrodes, which gives mica capacitors high precision and fairly stable properties.
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3. What is mica?
Rock-forming minerals
Mica is a rock-forming mineral that belongs to a layered aluminum silicate mineral. Its English name mica comes from the Latin micare, which means "shiny". Mica is widely found in nature, and common crystal systems include monoclinic and trigonal systems.
Chemical composition and physical properties
The main chemical components of mica include potassium, aluminum, magnesium, iron, lithium and other elements. Its physical properties include:
Color: The color of mica changes with the change of chemical composition, especially the increase of iron content will make the color darker.
Hardness: The Mohs hardness of mica is between 2 and 3.
Specific gravity: The specific gravity of mica is between 2.7 and 3.5.
Luster: Mica has a glassy luster, and the cleavage surface is pearly. -
4. What is mica used for in electronic products?
Mica is mainly used to make insulating materials in electronic products. Mica has the properties of heat insulation and insulation, and is widely used in the manufacture of electronic equipment. Its heat insulation properties can reduce the transfer of heat, while the insulation properties help prevent the flow of current and ensure the safety of the circuit.
Specific applications include:
Insulation layer of capacitors and transformers: Mica sheets are used to make the insulation layer of capacitors and transformers to prevent current leakage and protect the circuit from damage.
Electron tubes and carriers: Mica sheets are also used in the manufacture of electron tubes and carriers, providing good insulation.
High-voltage electrical equipment: In high-voltage electrical equipment, mica sheets are used to ensure the insulation performance of the equipment and ensure the safe operation of the circuit.
