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The rise of renewable energy has put ammeter resistors back in the spotlight. The world has turned to renewable energy in an attempt to wean itself from depleting carbon-based sources. The increase in the number of solar, wind, wave, and tidal power sources has pushed the need for a highly accurate method of measuring current where ammeter shunt resistor FL-2 type from Microhm Electronics are widely used for this purpose. The solution is required for several reasons: to ensure accurate billing, have a more granular level of c...
Date：2019-09-17 [More+]
Passive electronic components are getting smaller, but they are also providing better performance within the same form factor. Twenty years ago form factors such as 1812 and 1206 were widely used. Todays most commonly specified sizes are 0603 and 0402. The range extends down to 01005 (0.4 x 0.2 mm), and recently even to just 008004 (0.25 x 0.125 mm!). Microhm Electronics thick film resistor LMK series and NRC series start with the size 01005. For shunt resistor, the size can be down to 0805. The trend in SMD (surface mount de...
Date：2019-09-16 [More+]
Microhm Electronics high voltage series can be specified for use in industrial and general purpose high voltage systems, as well as a complete selection of high resistance, Hi-Meg, high-voltage, high frequency, and bulk ceramic resistors for higher average power dissipation. These High Resistance, High Frequency, High Resistance resistors combine the proven performance of Microhm Electronics resistance system with new cost efficient design elements and high voltage applications. Resistors produced from Serpentine Pattern Scr...
Date：2019-09-12 [More+]
Over the past 24 months the global resistor markets have been in turmoil. The turmoil was created by a shortage of thick film chip resistors. This in turn caused the price of ruthenium metal to increase, and the availability of aluminum substrates to be constrained. Subsequently customers looked to alternative technologies in nickel-chromium resistors to satisfy shortfalls in ruthenium/alumina resistor supplies. As a professional resistor manufacture, thick film resistor is also one of the main product lineup for Microhm Elec...
Date：2019-09-11 [More+]
Resistor is one of the most typically used passive components in electrical and electronics circuits. Resistor can be defined as a circuit element used for reducing current flow and also lower voltage levels in circuits. There are different types of resistors classified based on various criteria such as fixed value resistors, wire wound resistors, metal film resistors and special resistors, which can be found in Microhm Electronics easily, the typical ones are respectively MMS series, EE series, HPMRY series and NSR series. T...
Date：2019-09-10 [More+]
Thin film is usually used for precision applications. They feature relatively high tolerances, low temperature coefficients and low noise. Also for high frequency applications thin film performs better than thick film. Inductance and capacitance are generally lower. The parasitic inductance of thin film can be higher if it is executed as a cylindrical helix (metal film resistor). This higher performance comes with a cost, which can be factors higher than the price of thick film resistors. Typical examples where thin film is u...
Date：2019-09-09 [More+]
A shunt is a low-value resistor used to measure current it is therefore also referred to as a current-sense resistor. Microhm Electronics MPR series and MMS Series are typical current-sense resistor. The shunt typically connects in series so it carries the current of interest. A voltage measurement device then connects in parallel with the shunt. The current through the shunt generates a voltage drop that is measured. The current value is derived from Ohms law and the known resistance (I = V/R). To keep power loss and thus he...
Date：2019-09-09 [More+]
The fact that shunt resistors dissipate power as a result of the load current flowing through them requires that they have very low resistance values. Additionally, for measurement stability, current sense resistors should also have a very low temperature coefficient of resistance (TCR). A low TCR will result in high measurement accuracy with a low temperature dependency. The current sense resistors thermal EMF is another important characteristic. Current shunt resistors must operate over a wide range of currents. When the cu...
Date：2019-09-06 [More+]
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