RN142-1-02

Voltage Rating - AC:	250V
Package / Case:	Horizontal, 4 PC Pin
Height (Max):	0.787" (20.00mm)
Size / Dimension:	1.303" L x 1.280" W (33.10mm x 32.50mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	UR, VDE
Ratings:	--
Operating Temperature:	-40°C ~ 125°C
Series:	RN
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	810 mOhm (Typ)
Current Rating (Max):	1A (Typ)
Inductance @ Frequency:	33mH @ 1kHz
Number of Lines:	2
Filter Type:	Power Line
Part Status:	Obsolete
Packaging:	Tray

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Common Mode Chokes

Common mode chokes, also known as common mode inductors, are devices used to suppress the flow of common-mode currents in power electronic systems. These devices are gaining more and more attention as the need for clean, efficient and reliable power is increasing.The RN142-1-02 is the most employed common mode choke in electronic circuits. This device is a closed-core transformer, wound with a low-impedance, two-conductor, rayon windings. The windings of the RN142-1-02 have three levels of inductance. The winding ratio of the transformer is designed to cause an increase in impedance when operating on common-mode currents, while allowing individual-mode currents to pass through freely.The RN142-1-02 is mainly used in switching power converters, such as flyback converters and forward converters, to suppress the electromagnetic interference (EMI) generated by these converters. It is also used in multi-phase rectifiers, motor drives, and AC/DC power supplies.To understand how the RN142-1-02 works, it is important to first understand the principle of common-mode and normal-mode currents. Common-mode currents are flows of current which run through two metallic conductors in the same direction. Normal-mode currents, on the other hand, are flows of current which run through two metallic conductors in opposite directions. Common-mode noise is generated when signals or currents stray outside of the intended path, which can cause interference and noise in the power supply. This interference is the same as that created by electromagnetic fields in the environment. It is the job of the common mode choke to suppress this interference. The RN142-1-02 works by increasing the impedance of any common-mode current flow. This increases the resistance, reducing the peak amplitude of the current, thus reducing the source of interference. Meanwhile, this device allows normal-mode current to pass through, and does not affect the performance of the circuits in which it is used. The RN142-1-02 also has a number of features which make it an attractive choice for many applications. It is small in size, light in weight, and requires no external components. It is also relatively low cost and has good temperature stability. In conclusion, the RN142-1-02 is a commonly used common-mode choke. It is used to reduce common-mode noise and interference in a range of electronic circuits, such as switching power converters and DC/AC power supplies. It is small in size, light in weight, and requires no external components. It is also relatively low cost and has good temperature stability.

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