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Microhm Electronics expandeds its line of high-power wirewound resistors with the new LHR series of rugged metal-clad braking resistors that target industrial and commercial applications such as motor drives, power conversion systems, HVAC systems, and battery charging and monitoring applications. The LHR series, encased in aluminum and offer a power rating of 300 watts. These rugged resistors provide excellent heat transfer and reduce the need for heatsinking. They are also significantly less sensitive to heatsink requiremen...
Date：2019-12-31 [More+]
There are a vast array of power supplies on the market, and the variety of resistor applications, such as high voltage resistors, anti-surge resistor, non-inductive resistors, in those designs broaden the selection dramatically. Whatever the application, power supply designers must be aware of specific regulations on safety or the environment that apply to the area, as well as the actual electrical performance. The nomenclature of power supplies is often taken from whether the input is AC or DC, and what type of regulation is...
Date：2019-12-31 [More+]
LEDs are constant current devices with a predictable forward voltage drop based on the amount of current flowing through them. These current-voltage (I-V) curves are available in the datasheet for specific LEDs. If you want to drive a green LED with a forward voltage of 3V off a 5V power supply, you need something in that circuit to absorb the extra 2V. If you do not absorb that extra voltage, the LED junction will try to draw enough current to increase that voltage to 5V and burn itself up. The easiest way to absorb extra po...
Date：2019-12-30 [More+]
After an extended period of long lead times and robust demand, suppliers of passive components such as capacitors, resistors and inductors are now bearing the brunt of a weakening electronics market that is manifesting itself in slackening sales of electronics goods and prompting suppliers to lower quarterly forecasts. As electronic product design cycles typically involve the specifying and design-in of passive, interconnect, and electromechanical components later than semiconductors, suppliers of those parts typically feel a...
Date：2019-12-30 [More+]
The basics of electronics involve calculating the equivalent resistors in series or parallel. The designer learns the resistance of resistors in series is the sum of all the resistances, and when mounted in parallel, the inverse of the final resistor is equal to the sum of the inverse of the resistors. Micrhom Electronics provides broad range of resistors for engineers options. In the second step, designers learn that two resistors in series create a voltage divider. If one of these resistors is an NTC (Negative Temperature C...
Date：2019-12-30 [More+]
Resistors, no matter chip ones or through-hole ones, are a fundamental component in electrical circuits. Early scientists came to understand the concept of resistance shortly after they were conducting tests to determine the results of passing electricity through all kind of materials and subsequently discovered electrical current. While copper, gold, and aluminum were found to be great conductors with low resistance, air, mica, and ceramics were considered resistors because of their ability to greatly limit the flow of elect...
Date：2019-12-27 [More+]
A shunt is an element that is used in a circuit to redirect current around another part. Microhm Electronics is specilized in the RD of diverse shunt resistors. The areas of application vary widely. For some applications, electrical devices other than resistors can be used. A few examples are given to illustrate the diversity of shunts. Protecting a circuit against overvoltage A method to protect a circuit from a too high voltage is using a crowbar circuit. When the voltage gets too high, a device will short circuit. This res...
Date：2019-12-25 [More+]
It wasnt until the 1980s that surface-mount technology (SMT) gained in popularity and use. Until then, through-hole technology was the go-to option for more than 30 years. Once SMT became available, smaller boards were possible, however, SMT isnt always the answer. Devices utilizing SMT cannot be used directly with breadboards; they are not appropriate for large, high-power or high-voltage applications; and they arent suitable when there is mechanical stress. In these cases, and more, through-hole technology still shines. Mic...
Date：2019-12-24 [More+]
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