MC12FA391J-TF

Series:	MC
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	390pF
Tolerance:	±5%
Voltage - Rated:	100V
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	1210 (3225 Metric)
Lead Spacing:	--
Features:	RF, High Q, Low Loss
Size / Dimension:	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max):	0.079" (2.00mm)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Mica and PTFE Capacitors

Mica and PTFE capacitors are a type of capacitor widely used in many applications owing to their superior properties, such as high insulation resistance, low dielectric loss, low physical size, and high temperature stability and durability. In this article, we shall focus on the MC12FA391J-TF application field and working principle.The MC12FA391J-TF is a high-performance mica/polytetrafluoroethylene (PTFE) capacitor. It is made up of two thin metallic aluminum foils separated by a thin paper dielectric, coated with PTFE on each side and then impregnated with mica flakes for improved heat resistance and mechanical strength. The electrical properties of this capacitor depend on the dielectric constant, dissipation factor, and insulation resistance of the materials used.The MC12FA391J-TF is commonly used in a variety of DC and pulsed power management applications, such as in switch-mode power supplies (SMPS), battery chargers, and data converters. Its small physical size, low profile, and high insulation resistance make it ideal for embedded and portable electronic equipment. It is also widely used in electromagnetic interference (EMI) suppression, high-frequency circuits, and RF circuits.The main advantage of MC12FA391J-TF capacitors is their ability to maintain their capacitance at temperatures of up to 125°C without any significant change in characteristics. This makes them suitable for applications where extremely high temperature ranges and superior reliability are required. The physical size of this capacitor is small, and its shape and size can be easily adapted to fit in limited spaces. Additionally, it has high insulation resistance and low ESR, which result in high efficiency and improved energy savings.The working principle of these capacitors is based on the principle of electrostatic charge and is dependent on the dielectric constant, dissipation factor, and insulation resistance of the materials used. When an electric potential is applied across the two plates of the capacitor, charge is transferred and collected on the surface of the plates. This stored charge creates an electric field between the two plates that stores energy and affects the flow of current. When the electric potential applied across the plates is removed, the charge is slowly released, creating a reverse current flow that eventually reaches a steady state. This process is known as dielectric leakage.To sum up, the MC12FA391J-TF is one of the most popular mica and PTFE capacitors, due to its superior properties such as high insulation resistance, low dielectric loss, low physical size and temperature stability. It is currently widely used in DC and pulsed power management applications, such as in switch-mode power supplies, battery chargers and data converters. Furthermore, its operation is based on the principle of electrostatic charge.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description