CM9900R-683

Voltage Rating - AC:	--
Package / Case:	Vertical, 4 PC Pin
Height (Max):	0.669" (17.00mm)
Size / Dimension:	0.839" L x 0.740" W (21.30mm x 18.80mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-55°C ~ 125°C
Series:	CM9900R
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	19 mOhm
Current Rating (Max):	3.5A
Inductance @ Frequency:	68µH @ 1kHz
Number of Lines:	2
Filter Type:	--
Part Status:	Active
Packaging:	Bulk

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Common Mode Chokes are widely used in different electrical and electronic applications requiring the suppression of electromagnetic interference (EMI) and power line noise. CM9900R-683 is a type of common mode chokes, which is specially designed to offer a high dynamic range of common mode impedance with low additional series resistance and low volume. This type of common mode choke offers excellent properties such as excellent low-pass filtering and other applications include power line noise to reduce the low-frequency currents induced by fast switching drivers.

Application Fields of the CM9900R-683 Common Mode Choke

The CM9900R-683 Common Mode Choke is mainly used for suppression of high-frequency electromagnetic interference (EMI), and also for power line noise. Its application fields include:

• Cellular communications systems
• Wired and Wireless networks
• Vehicle electronics
• Satellite systems
• Ethernet cabling and connectors
• Photovoltaic systems
• TV and radio antennas

This type of common mode choke is mainly used for suppressing high-frequency electromagnetic interference generated by airborne RF sources such as cellular base stations, Wi-Fi routers, and other electronic devices. This product from TDK was designed for use in applications where noise filtering is needed. The design of the CM9900R-683 features low series resistance of 0.15cm and offers a high dynamic range of common mode impedance over a broad frequency range.

Working Principle of CM9900R-683 Common Mode Choke

The CM9900R-683 Common Mode Choke works by using a filter-assisted circuit design to reduce the amount of common mode current, which is the current that flows in both directions along the power line. The main advantage of this design is that it requires very little additional series resistance. This low additional series resistance reduces line losses and increases the dynamic range of common mode impedance. In the CM9900R-683 Common Mode Choke, two coils are wound in series around a common core, and the two coils are wound in opposite directions to create a low pass filter with the inductance of both coils added together. The core material is designed to provide a low core loss and a high insertion loss, which effectively reduces high-frequency noise. When the common mode current passes through both coils, the high frequency noise is filtered out, resulting in a lower overall common mode current.In addition to low frequency interference (LFI) suppression, the common mode choke also provides protection from fast switching drivers, which can cause additional low-frequency currents to be induced. The CM9900R-683 Common Mode Choke can reduce these currents and thus provide better noise immunity to the system.

Overall, the CM9900R-683 Common Mode Choke is an ideal solution for applications in which noise filtering is needed. Its low additional series resistance, high dynamic range of common mode impedance, and excellent low-pass filtering makes it a reliable choice for EMI suppression and power line noise reduction.

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