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Through Hole Resistors

Through Hole Resistors, or THRs, are passive electronic components, or resistors, that are connected to printed circuit boards (PCBs) using two leads which are passed through holes drilled into the PCB material. THRs are used in a wide variety of electronic applications, such as input protection, over-current protection, power supply regulation, bias networks, noise suppression, AC/DC conversion, and biasing. They are the primary form of resistance used in most electronic circuits and systems, and come in a wide variety of shapes and sizes. The most common type of THR is a device made of a resistor material with two protruding metal leads, a metal case, and a thermally conductive mounting. The leads are electrically connected to two small metal or plastic solders which are inserted into the PCB holes.

MFP50SBBE52-4K22 application field and working principle

The MFP50SBBE52-4K22 is a through-hole resistor designed for a variety of applications. It is a four-terminal device with a thermally conductive epoxy mold body and an adjustable control element. The resistivity range is 1.4 Ohms to 52 Ohms. The device is suitable for use in electric motor controls, power supply regulation, protection circuits and other noise suppression applications.

The device is based on the principle of oxidation of metal surfaces to create a resistive material. The MFP50SBBE52-4K22 uses a molybdenum disilicide (MoSi2) element which is oxidized at temperatures up to 1100° C. This oxidation creates a thin, stable, highly resistive layer on the surface of the element. The resistor is then filled with a material such as lead-bismuth-plated lead to provide mechanical stability. The four terminals of the device are used to measure the current through the resistor and to adjust the resistance. The terminals are connected in series with the resistive element and the adjustment is made by breaking the circuit at one of the terminals and inserting a shunt or small resistor. The current passing through the resistor can then be adjusted.

The device also includes a self-adjusting wiper contact which allows the resistance to be adjusted directly from the front panel. For applications where temperature stability is required, the device has two terminals which can be used for connection to a temperature compensation thermistor. This provides additional resistance adjustment at temperatures lower than the device\'s ambient temperature.

This device is rated for operation up to 160 Volt DC and for currents up to 1 Amp. It is also designed to be robust and durable, with an environmental rating of UL94V-1 and a dielectric strength of 700 VDC. The device is capable of resisting voltage surges up to 100000V/s without damage. It is also RoHS compliant and is constructed using environmentally friendly components.

The MFP50SBBE52-4K22 is a versatile and reliable THR suitable for many applications. It is easy to use, provides excellent temperature stability, and is robust and reliable.

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