C-2 40.0000K-C: PB FREE

Series:	C-2
Part Status:	Active
Type:	kHz Crystal (Tuning Fork)
Frequency:	40kHz
Frequency Stability:	--
Frequency Tolerance:	±20ppm
Load Capacitance:	18pF
ESR (Equivalent Series Resistance):	20 kOhms
Operating Mode:	Fundamental
Operating Temperature:	-10°C ~ 60°C
Ratings:	--
Mounting Type:	Through Hole
Package / Case:	Cylindrical Can, Radial
Size / Dimension:	0.079" Dia x 0.236" L (2.00mm x 6.00mm)
Height - Seated (Max):	0.236" (6.00mm)

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Crystals are among the oldest and most important components in electronics. They are used to control the frequency of many types of devices. The type of crystal known as a C-2 40.0000K-C was designed for use in PB FREE applications. This article will discuss the application field and working principle for this type of crystal.C-2 40.0000K-C begin their lives as a quartz blank, which is a piece of piezoelectric quartz cooled to room temperature. The quartz blank is then cut and processed in a number of different ways depending on the application. For C-2 40.0000K-C crystals, the quartz blank is cut into a rectangle or a tuning fork shape. Then, it is ground and polished until it forms an even and consistent thickness.Next, the quartz is put through a metallization process to form electrodes on the surface of the crystal. This process involves sputtering a thin metal film onto the crystal surface. This metal film is then connected to two electrodes: the anode, which is the positive terminal, and the cathode, which is the negative terminal.After the crystal is metallized, a conductive dielectric material called a passivation layer is added. This passivation layer is typically made from a nitride material and is used to establish an electrical connection between the two electrodes and for protection from temperature changes.The application field for C-2 40.0000K-C crystals includes automotive and industrial, audio, broadband telecommunications, and timing applications. In automotive and industrial applications, they are used to control the frequency of vibration motors, ignition systems, and other electronics. In audio applications, they are used to control the frequency of audio oscillators, filters, and amplifiers. In broadband telecommunication applications, they are used to control the frequency of voltage-controlled oscillators and receivers. Finally, in timing applications, they are used to provide extremely accurate and stable timing signals.The working principle of C-2 40.0000K-C crystals is based on the fact that piezoelectric quartz exhibits mechanical properties when a voltage is applied to its electrodes. When this voltage is removed, the quartz returns to its original shape. Additionally, when a voltage is applied to the quartz at its natural frequency, it will vibrate at this resonant frequency. It is this vibrational behaviour that makes quartz crystals so valuable in frequency control applications.To ensure the most accurate frequency control, C-2 40.0000K-C crystals are typically aging tested either by the manufacturer or by the end user. This aging test can consist of a variety of controlled temperature and voltage testing to ensure that the crystal will maintain its frequency stability over time.In conclusion, C-2 40.0000K-C crystals are used in a variety of applications ranging from automotive and industrial to audio and telecommunications. The working principle of these crystals is based on the piezoelectric properties of quartz which allow them to vibrate at a specific resonant frequency when a voltage is applied to their electrodes. Additionally, they must be aged tested to ensure that they will remain stable over time.

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