4700-003TLF

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EMI/RFI filters are extensively utilized to reduce the phenomena of electromagnetic interference (EMI) and radio frequency interference (RFI). These filters are essential components in system designs where these disturbances are too high to meet regulatory or other compliance requirements.The 4700-003TLF is a filter from TDK-Lambda’s 4700-003T product family of EMI/RFI Filters. This filter is designed to block undesired AC power lines and can also provide single-line noise suppression. The 4700-003TLF application field is mainly found in applications where line-to-ground isolation is important. The typical applications include three-phase AC-powered industrial equipment, such as switching power supplies, uninterruptible power supplies, industrial controllers/inverters, robotic systems, and railway systems. The 4700-003TLF can be used in AC systems with a maximum of 600V AC or below. It offers two levels of peak impulse voltage protection (1.2/50µs applied peak voltage of 6kV contact/8kV air).The working principle of the 4700-003TLF is relatively simple. It is mainly an RC network of capacitors and resistors that filter out unwanted Radio Frequency (RF) and Electro-Magnetic Interference (EMI) signals from AC power lines. The filter consists of three capacitor elements and two resistor elements. These form a long line with an RC network on each line. It also includes a fuse mounted in the center for current-limiting. The filter also has a metal housing, which provides the necessary mechanical strength for temperature and vibration protection.In terms of performance, the 4700-003TLF can filter out signals with a frequency range from 10kHz to 1GHz, and a frequency attenuation level of up to 50dB. The filter also provides peak current protection, and can handle a maximum of 5A continuous RMS current and up to 10A peak transient currents.Overall, the 4700-003TLF EMI/RFI filter from TDK-Lambda is an effective, reliable solution for suppressing interference in AC power lines. It has a wide range of applications, and is tailored for AC systems with up to 600V AC. Its RC network filters out signals with a frequency range from 10kHz to 1GHz, and a frequency attenuation level of up to 50dB. It can also handle up to 5A continuous RMS current and up to 10A peak transient current. The filter also comes with a metal housing that provides mechanical strength for temperature and vibration protection.

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