S555-5999-02-F

Series:	--
Part Status:	Obsolete
Mounting Type:	Surface Mount
Size / Dimension:	0.475" L x 0.400" W (12.07mm x 10.16mm)

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Common Mode Chokes are indispensable components for switching noise, and S555-5999-02-F is a common model widely used in the industry. It overcomes the problem of insufficient current carrying capacity of traditional common mode chokes, and also has considerable advantages in terms of the wide operating temperature range, the good common mode attenuation, and the variety of mounting options.Application FieldS555-5999-02-F is mainly used in electronics and electrical devices containing transformers, capacitors and other components used in the power supply. The device can suppress the common-mode differential-mode interference generated by the switching and communication network, and can greatly reduce the coupling of interference in the form of leakage current.Due to the high magnetic permeation, it has a wide power frequency range (from 0 to 20kHz) and a wide operating temperature (-25℃ to +105℃) and an excellent common mode rejection ratio (above 72dB at 1KHz three frequency points). Installation of S555-5999-02-F can effectively prevent the problem of high frequency common mode interference when power circuits are working.Working PrincipleS555-5999-02-F is a three winding common mode choke with three symmetrically arranged windings. The three windings share the same daughter core. The windings are arranged in a Y-form, one long leg and two short legs, and the long leg is connected to the primary winding of the EMI filter chip. The inductance of the device is determined by the number of windings and the permeability of the daughter cores.The magnetic induction of the three windings is equal, and the equal-length shielding structure is adopted to make the electric field couple in series, so as to achieve the purpose of suppressing common-mode interference. When the external line is subjected to high-frequency common-mode interference, due to the different magnetic fluxes of the three windings, the mutual inductance generates different induced voltages, so the external line is shielded. In other words, the high-frequency interference is not coupled to the outside, and the ground line of the system is kept from interference.Since the current intensity of each winding is the same, their voltages are also different, so the two short legs of the connection have a low impedance compared to the ground, while the long leg has a high impedance block to common mode current. The high impedance of the long leg also prevents the leakage current from coupling to the ground in the form of leakage current, and effectively suppresses the common-mode interference in the power circuit.ConclusionIn conclusion, S555-5999-02-F is a three-winding common mode choke with excellent performance, wide frequency range and wide operating temperature range, and is widely used in the industry. Its working principle is mainly to shield the external line from high frequency common-mode interference, so as to prevent the transmission of common-mode interference. Considering its excellent performance, S555-5999-02-F is an indispensable device for suppressing noise in switching and communication networks.

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