TLF9UBH302W

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Common Mode Chokes are common electrical components, often used to reduce Electronic Circuit noise. The TLF9UBH302W (“302W”) is a well-known example, and a popular application for them is in High Voltage, Large Current Power Electronics, as these chokes provide a low-cost, reliable, and effective way to reduce EMI.

This particular 302W choke has a special robust design, with a large temperature range from -55°C to +200°C, and can operate reliably with voltages up to 2150VAC. The 302W also has an innovative internal design, with three high-current-carrying lines that run between each winding to reduce the tendency for long-range EMI.

The 302W is a single-side Common Mode Choke, designed to reduce energy conduction on one side only. It works by absorbing and blocking high-frequency current, while allowing lower-frequency current to flow with minimal interference. The 302W can absorb up to 30A of current, with a maximum DC resistance of 0.06Ω.

The 302W is commonly used in applications such as inverters, choppers, variable frequency drives, motor controllers, and power-factor-correction (PFC) systems. It provides a cost-effective solution in these applications, providing both EMI reduction and electrical isolation, and can be easily mounted on a PCB or panel.

In terms of working principle, the 302W utilizes inductive reactance to reduce EMI and eliminate power dissipation. Inductors store energy in the form of an electromagnetic field, and when they are exposed to an alternating current, their stored energy opposes the changes in the current. This creates an inductive reactance, which then resists the current and produces a voltage drop across it.

The 302W is designed to be an effective tool in EMI mitigation, while also offering superior electrical isolation properties. Its robust design and high temperature range make it reliable for use in a wide range of applications. The AC current absorption capability and low DC resistance of the 302W make it a popular choice in power electronics applications, and its ability to reduce EMI provides extra benefits to the end user.

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