MC18FD301J-T

Series:	MC
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Capacitance:	300pF
Tolerance:	±5%
Voltage - Rated:	500V
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	1812 (4532 Metric)
Lead Spacing:	--
Features:	RF, High Q, Low Loss
Size / Dimension:	0.177" L x 0.126" W (4.50mm x 3.20mm)
Height - Seated (Max):	0.079" (2.00mm)

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Mica and PTFE Capacitors

Mica and PTFE capacitors are a class of capacitors specifically designed for high-temperature applications. They are most commonly used for ultra-high-frequency, high-temperature electronic applications, such as for EMF shielding in power electronics. These capacitors provide superior performance compared to conventional ceramic or electrolytic capacitors, due to their improved dielectric and physical properties. The MC18FD301J-T are one such example of these capacitors, designed for use in frequency and temperature controlled applications.

What is a Mica Capacitor?

A mica capacitor is a type of capacitor constructed from a combination of mica and PTFE. Mica is a mineral that has excellent dielectric properties, meaning its frequency characteristics are stable over a wide range of temperatures and frequencies. It is also quite strong and rigid, making it an ideal material for high-temperature and high-frequency applications. On the other hand, PTFE stands for “polytetrafluoroethylene,” a fluoropolymer that is highly resistant to temperatures and solvents. It is also very non-reactive, meaning it won’t degrade in the presence of reactants.

What is the MC18FD301J-T?

The MC18FD301J-T is a mica and PTFE capacitor, designed for use in temperature and frequency controlled applications. It features a miniaturized design, allowing it to be used in the most space-constrained applications. The MC18FD301J-T has a unique construction, consisting of a mica dielectric, PTFE coating, and a silver foil terminal edge plate. The construction of the MC18FD301J-T allows it to be used in temperature-controlled, high-frequency applications, with minimal losses and long service life.

MC18FD301J-T Application Field

The MC18FD301J-T is well-suited for applications that are temperature and frequency sensitive, such as in power electronics, automotive and industrial equipment, and communication systems. Its superior characteristics make it ideal for applications in which:- High thermal cycling is required;- High humidity levels and rapid temperature changes are present;- High temperature requirements must still be maintained.

MC18FD301J-T Working Principle

Mica and PTFE capacitors work differently from conventional ceramic or electrolytic capacitors. This is due to their unique construction. A mica capacitor consists of mica foil sandwiched between two layers of PTFE. This creates a dielectric with both high thermal stability and high breakdown voltage. The silver foil terminal edge plate is used to prevent arcing and surface voltage increases. The working principle of the MC18FD301J-T is relatively simple. The mica dielectric is sandwiched between two PTFE layers, creating a reliable capacitor with excellent electrical properties. When voltage is applied, electrons flow through the mica dielectric, creating a charge. The charge will remain until the voltage is removed. The combination of mica and PTFE also makes the MC18FD301J-T highly resistant to temperature, humidity, and other environmental conditions, so it can be used in reliable applications for long periods of time.

Conclusion

The MC18FD301J-T is a mica and PTFE capacitor, designed for use in temperature and frequency controlled applications. Its unique construction allows it to withstand high temperatures, humidity levels, and rapid temperature changes. It also has superior electrical properties and excellent thermal characteristics, making it ideal for applications in power electronics, automotive and industrial equipment, and mobile communication. By understanding the working principle of the MC18FD301J-T, users can ensure reliable and consistent performance in a variety of applications.

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