MC18FD331J-F vs BFC233450274
| Part Number |
|
|
| Category | Mica and PTFE Capacitors | Film Capacitors |
| Manufacturer | Cornell Dubilier Electronics (CDE) | Vishay Beyschlag/Draloric/BC Components |
| Description | CAP MICA 330PF 5% 500V 1812 | CAP FILM 0.27UF 5% 400VDC RADIAL |
| Package | Bulk | Bulk |
| Series | MC | MKT334 |
| Features | RF, High Q, Low Loss | Long Life |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 105°C |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | 1812 (4532 Metric) | Radial |
| Tolerance | ±5% | ±5% |
| Size / Dimension | 0.177" L x 0.126" W (4.50mm x 3.20mm) | 0.689" L x 0.276" W (17.50mm x 7.00mm) |
| Voltage - Rated | 500 V | - |
| Lead Spacing | - | 0.591\" (15.00mm) |
| Height - Seated (Max) | 0.079\" (2.00mm) | 0.532\" (13.50mm) |
| Capacitance | 330 pF | 0.27 µF |
| Dielectric Material | Mica | Polyester, Metallized |
| Applications | - | General Purpose |
| Termination | - | PC Pins |
| Voltage Rating - AC | - | 275V |
| Voltage Rating - DC | - | 400V |
| Ratings | - | - |
| ESR (Equivalent Series Resistance) | - | - |
-
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 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. -
3. 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. -
4. What is a PTFE capacitor?
PTFE capacitor, also known as polytetrafluoroethylene capacitor, is a capacitor that uses polytetrafluoroethylene (PTFE) as a dielectric material. PTFE capacitors consist of a layer of PTFE film and two conductive plates. They have excellent insulation properties, chemical stability and mechanical strength, and can maintain stable capacitance characteristics at high frequencies.
Features
High dielectric constant and low loss: PTFE film has a high dielectric constant (generally between 50 and 100), which makes PTFE capacitors low-loss and helps to increase device power.
Excellent temperature and chemical stability: PTFE film has excellent heat resistance and chemical resistance, and can remain stable in extreme temperature and chemical environments.
High mechanical strength and wear resistance: PTFE film has excellent mechanical strength and wear resistance, and can be used for a long time in harsh environments without being easily damaged.
Miniaturization and high integration: With the development of manufacturing technology, PTFE capacitors have achieved miniaturization and high integration, suitable for various microelectronic devices.
