RFCS04021200BJTWS

Series:	RFCS
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Capacitance:	12pF
Tolerance:	±5%
Voltage - Breakdown:	16V
ESL (Equivalent Series Inductance):	--
Applications:	--
Features:	--
Operating Temperature:	-55°C ~ 125°C
Package / Case:	0402 (1005 Metric)
Height:	0.016" (0.41mm)
Size / Dimension:	0.040" L x 0.020" W (1.02mm x 0.51mm)

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Silicon CapacitorsSilicon capacitors are one of the most versatile capacitors that exist. They are used in a wide variety of applications, including consumer electronics, automotive, medical, military, industrial, and many more. The type of silicon used often dictates its use in a specific application. Because of its increased frequency stability, low parasitics, and large temperature range, silicon-based capacitors are ideal for RF applications, such as RF switches, mixers, and antennas. Many silicon-based capacitors are also available in leadless or chip bridge configurations, which provide greater accuracy and reliability in many applications.The structure of a silicon capacitor is similar to that of an electrolytic capacitor, with the exception that the dielectric is a thin film of silicon instead of an electrolyte. This film layer is usually extremely thin, typically ranging from 3-7 nanometers in thickness. The films can be made single-layer (monolithic film) or multilayer (multilayer film). The multilayer design, also known as a “bridge” capacitor, is capable of withstanding higher operating temperature, has higher dielectric constants, and can provide better electrical performance.The most common type of silicon capacitor is the RFCS04021200BJTWS (Reverse Field Capacitor Switchable), which consists of a reverse field semiconductor diode and a silicon film. The diode acts as an anode, while the silicon film serves as the dielectric. The device is capable of withstanding high-voltage spikes, and it is available in various sizes and shapes. The primary benefits of this capacitor include high-stability, low thermal resistance, small size, and its low time-constant.The RFCS04021200BJTWS operates by using a reverse field semiconductor diode to create an electric field across the silicon dielectric film. This electric field allows for the capacitor to store and release electrical charge. It can also be used as a charge controllable switch, which allows for high levels of precision and performance. The device is typically used in power supplies, communications, and switching applications.The working principle of the RFCS04021200BJTWS is based on the use of a Field-Effect Transistor (FET) to control the switching action. This phenomenon is referred to as the Reverse Field Effect, and when a certain voltage is applied to the diode, the FET acts as an open switch, allowing for the capacitor to store electric charge. When the voltage is decreased, the FET closes and the capacitor then releases its charge. The RFCS04021200BJTWS is designed to handle higher voltages and reverse current, making it a great choice for high-reliability applications.In conclusion, silicon capacitors are one of the most versatile and reliable components out there. The RFCS04021200BJTWS is an example of a silicon capacitor that has a wide range of applications due to its high-stability, low thermal resistance, small size, and its low time-constant. Its use as a reverse field device makes it ideal for RF applications, and its ability to control electric charge makes it a great choice for precision and reliability.

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