51-712-001

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EMI/RFI filters (LC, RC Networks) are circuits that are typically used to block certain frequencies and prevent interference. An EMI/RFI filter, also known as an electromagnetic interference filter, is a device that is placed between an electronic circuit and an electronic device to suppress unwanted frequencies. There are two main types of EMI/RFI filters, LC and RC networks. The 51-712-001 application field and working principle is a specific EMI/RFI filter item.

An LC filter is made up of inductors and capacitors. An inductor stores energy in a magnetic field and a capacitor stores energy in an electric field. An LC filter consists of either a single inductor and a single capacitor, or multiple inductors and capacitors, connected in a series or parallel manner. The inductors act as high-pass filters, allowing the higher frequencies to pass through while blocking the lower frequencies. The capacitors act as low-pass filters, allowing the lower frequencies to pass through while blocking the higher frequencies.

When the LC filter is designed, the circuit resonates, and depending on the frequency of the device, the frequency that it resonates at will either be higher or lower than the frequency of the device. This allows the LC filter to act as a band-pass filter, because the filter will pass through the signal that is to be blocked, as well as the signal that is to be passed, and block out any other frequencies.

The 51-712-001 application field and working principle is that of an LC filter. The device has the capability of blocking EMI/RFI noise ranging from 10 kHz up to 1 GHz. It has an insertion loss of 8 dB and can handle up to 1 Amp of current. The device is also designed to withstand high temperatures which makes it suitable for use in a variety of applications.

The device has two basic components, an EMI filter core and an EMI suppression resistor. The EMI filter core is a series of inductors and capacitors that form the LC filter and act as the band-pass filter. The EMI suppression resistor is a resistor that is connected in series with the EMI filter core, and its purpose is to dampen any high frequency noise or oscillations that could occur due to the LC filter’s resonance.

The 51-712-001 application field and working principle combines the features of an LC filter and an EMI suppression resistor to create a device that is capable of blocking out EMI noise ranging from 10 kHz up to 1 GHz. The device is designed to withstand up to 1 Amp of current and is also suitable for use in a variety of applications due to its ability to handle high temperatures.

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