TLF14CBH3330R3

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Common Mode Chokes

Common mode chokes, or CMC, are electric-magnetic components mainly used for limiting and damping of differential-mode current. CMCs are also applicable in filtering applications that have low-frequency noise. CMCs are a kind of inductor usually consisting of one or two winding of coil, and one or two cores. CMCs are often used to suppress harmonic interference and coupling current in the area of power line device, because they are able to reduce or cut off the flow of the common-mode current, which is believed to directly cause such types of interference.

TLF14CBH3330R3 is one of the typical examples of CMC. It is manufactured by LEMO Company, a world-class manufacturer in the industrial common-mode chokes field.

TLF14CBH3330R3 Application Field

TLF14CBH3330R3 is a toroidal common mode choke with good performance in common mode noise suppression, as well as excellent DC superposition performance. Its two-stage power dissipation index and ten-level symmetrical inductance ensures wide current and common mode current suppression bandwidth. Due to its satisfactory performance in power line, it is ideal for capacitive load, LC and RC circuits-loop disconnection for motor drives, industrial applications and telecommunication equipment.

TLF14CBH3330R3 Working Principle

The working principle of TLF14CBH3330R3 is based on differentiating between the two modes of electromagnetic current, namely, the common mode current and the differential mode current. Differential mode means that the current flows in the same direction on both sides of the toroidal core, i.e., symmetric current. Common mode current is defined as an asymmetric current, which means that the current on each side is flow in different direction. TLF14CBH3330R3 works by inhibiting the common mode current while allowing the differential mode current to pass.

When the current in both wires is the same, meaning a common mode current is flowing, the magnetic fields created by the two wires cancel each other out and the core of the inductor will not have to magnetize. If the current is equal in magnitude but different in direction, meaning a differential mode current is flowing, the magnetic fields from the two wires will add and the resistor will have to magnetize, creating a magnetic field that restricts current flow, thereby dissipating the induced interference.

In conclusion, TLF14CBH3330R3 can be used to limit or reduce the common mode current, and have good performance in common mode noise suppression. It is an ideal choice for those applications which are relevant to low-frequency noise.

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