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The function of a resistor is to oppose the electric current through it. This is called electrical resistance, and is measured in the unit ohm. The resistance can be calculated with Ohms law, when the current is known and the voltage drop is measured by Ohms Law R=V/I. Recently more customers request for T resistors or G ( gigaohm ) resistors for measurement and control equipment and other applications. Microhm offer thick film resistor NRB series and NGP type. The concept of current, voltage and resistance can be explained b...
Date：2019-07-25 [More+]
A magneto resistor is a resistor of which the electrical resistance changes when an external magnetic field is applied. Magneto resistors have a variable resistance which is dependent on the magnetic field strength. A Magneto resistor can be used to measure magnetic field presence, strength and direction. They are also known as magnetic dependent resistors (MDR). A magneto resistor is a subfamily of magnetic field sensors or magnetometers. Applications include for example: electronic compass, magnetometry, various sensors and...
Date：2019-07-23 [More+]
Networks save limited PC space since a multi-resistor package often takes up less room than individual resistors occupy. They may also reduce needed PC traces if some or all of the resistors have a common connection. Networks also support a routing discipline which enables a cleaner, more logical layout arrangement. On the other hand, they may actually require longer PC-board traces. Besides adding to board crowding and layout challenges, these longer traces may increase noise pickup and adversely affect signal integrity. In ...
Date：2019-07-22 [More+]
Resistors that tolerate against surge are used in power supplies, automotive, industrial equipment, consumer and power supply. Pulse means the overload of large power and with long duration(large energy) whereas surge means overload like ESD, of high voltage and with short duration. Anti-pulse resistors are unlikely to be damaged even if large power is instantaneously applied. Among SMD type resistors, thick film chip resistors, like compact Microhm NBS Series, are generally stronger against pulse than metal film chip resisto...
Date：2019-07-22 [More+]
Although not a complex component, resistors have specifications that can be confusing, misleading, and misinterpreted. When specifying performance qualities, it is important to review and understand the resistor test conditions to properly interpret and apply the results to your design. There are potentially significant differences in data presented by resistor manufacturers and those differences can significantly affect performance. The specification process for resistors involves more than just allowing for tolerance bands....
Date：2019-07-18 [More+]
Full-metal shunt resistors consist of a homogeneous resistive element so that no additional inductance develops. This quality is key in such high-precision applications as medical technology or precision measurement devices. Furthermore, these resistors are characterized by high measurement accuracy and resistance to thermal shock. They are available in various sizes including versions that are much larger than standard chip resistors and TCR below 100 ppm/K. Full-metal resistors can operate with an output of up to 36W at max...
Date：2019-07-18 [More+]
Today, practically every control and monitoring circuit uses shunt-based current measurements as an alternative to sensors. To make these measurements accurately, it is useful to understand how shunts work. Because the method is categorized as a precision measuring technology, Microhm reminds that it should be managed seriously. A shunt is a low-value resistor used to measure current it is therefore also referred to as a current-sense resistor. The shunt typically connects in series so it carries the current of interest. A vo...
Date：2019-07-17 [More+]
Blower resistors are resistors which are used to control the fan speed of automotive blowers. The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system. The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works. Blower resistors, being a mechanical component, are prone to wear and are the most common point of failure in a cars heating system. This article...
Date：2019-07-16 [More+]
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