Low Ohmic Current Sense Resistors

DeMint (CSM) provides high performance and reliability over the entire operating temperature range, with a small enclosure size and high power rating compared to standard current sense resistors. Resistance value starts at 1mΩ and goes to 700mΩ

DeMint Electronics equipped with (FLM) alloy shunt on its current sensing surface mount devices. It adopts the design of folding terminals outward and inward. Nickel-copper or manganese-copper alloy stamping is used to maintain the superior electrical characteristics of the surface mounting structure. It has the characteristics of pulse resistance and high precision.

Metal Plate FLP shunts can withstand higher current load than traditional resistors and surface mount resistors. Its power can reach 3W~70W, temperature coefficient ±50ppm/ °C, ±100ppm/ °C, inductance is less than 10 nH, resistance is as low as 0.00005Ω, tolerance accuracy ±1%, ±2%, and ±5%, and overcurrent capacity can reach 100A~600A.

DeMint (LRE) series enable a wide range of design options and flexibility allows designers to specify the resistance value and tolerance that their circuits require, instead of designing their circuits to the resistance values available. At the same time, DeMint Electronics also offers AEC-Q200 Automotive Grade (LREA) specifications by extending (LRE) series for vehicle applications.

DeMint extends its surface-mount current sensing series with (LRF). This 4-terminal connection Kelvin chip resistor derivative in 1/2 watt and 1 watt package sizes. TCR down to 150ppm and enables tight tolerances down to 1% for increased measurement accuracy. DeMint LRF0612 combines tight tolerance and low TCR with extremely low resistance values down to 0.5mΩ in the compact 0612 case size.

Five jumpers for the different resistor chip sizes are provided a wide range of standard dimensions 1206, 2512, 2817, 2725, and 4527 to make ease of designs along with footprint template compatibility. These true metal alloy strip zero ohm chips (LRJ) make options with a lot less space and cost than DIP switches and jumper headers.

Providing design engineers with an economical low ohmic value, current sense metal strip chip resistor with high quality performance, DeMint Electronics LRC Series is suitable for applications in the automotive sector for applications that require high power handling (Up to 3W) and low resistance 0.5mΩ.

Designed specifically for high current applications LRS, the power can reach 3W, 5W, 6W, and 7W. The range of ultra-low resistance is from 0.1mΩ to 6mΩ. There are many options in selecting precision tolerances (±1%, ±2%, ±5%). Two types of chip dimensions are available: standard size 2512, 3920, and 5930; special size 3921, 4026, 4527, and 5931.

For the development of current detection and shunting applications, DeMint's high current shunt (LRN) adopts the welding structure of Manganin and KAMAR (NiCr20AlSi) precision resistance alloys. The spacing standard design makes it easy for surface mounting, reflow soldering, and suitable for current sensing and shunting applications.

Designed for current detecting resistors in power electronic systems, the fully RoHS compliant CS series is suitable for a range of applications including the monitoring of power usage and battery life; and provision of output protection for power supplies; as well as for a range of consumer and automotive products such as satellite navigation, handheld PDAs and digital set-top boxes.

The trend towards smaller handheld and portable electronics equipment has also increased the need for ultra small current sensing thin film resistors. Devices from the DeMint Electronics' TCS series use a thin film construction that enables them to achieve precision resistance tolerances, low noise and long-term stability.

(LRM) Design for applications that require a wide range power handling from 1/8W up to 3W and low resistance values from 1mΩ to 100mΩ and come with a range of advantages including a wide temperature range and a varied choice of wide range package sizes 0805, 1206, 2010, and 2512.

(LRP) is aiming for very high power-to-footprint size ratio, excellent frequency response and very low inductance in a solid metal nickel-chrome or manganese-copper allow resistive element with low resistance values from 7mΩ to 100mΩ.

Kelvin four-terminal resistors are used to ensure that the current acts on two opposite terminals and to measure the detection voltage of the other two terminals, thereby reducing the influence of resistance and temperature coefficient between terminals and obtaining more accurate current measurements.

The (FLU) offers a higher current load than conventional axial resistors and SMD resistors, with a wide range pitch of radial pins to choose from. Its rated power can be up to 1W ~7W, temperature coefficient as low as ±40ppm/°C, resistance tolerance accuracy ±1%, ±2%, and ±5%, resistance range as low as 0.1mΩ to 10mΩ.

The LRA Low Ohmic Resistor is designed for applications requiring the transfer of heat away from circuits and solder joints. Available in 0.5W, 1W, and 1.5W rating, the resistor is being specified for current sensing, feedback, current detective, supper low inductance, as well as surge and pulse applications.

Developed for current sensing and shunt applications, DeMint's LRB Shunts of bare element open air resistors have a Ni-Cu alloys element, copper-clad steel leads and welded construction. Built-in stand-offs and standard spacings make for easy mounting. Customer can specify resistance range designed to satisfy challenging and specific technical requirements.

The OAR devices with increased height improve cooling efficiency, and because many power supply designs are already tightly-packed at the PC board level, the additional height does not create any profile issues. The OAR series resistors feature a reduced pitch, or spacing between the leads on the circuit board with a corresponding increase in the board mounted profile.

A wide range of precision shunts, designed for use with kilowatt-hour meters and other high-current applications where a high level of accuracy is required, is now available from DeMint Electronics. Precision current shunts are low resistance resistors used to measure AC or DC electrical currents by the voltage drop those currents create across the resistance. Sometimes called an ammeter shunt, it is a type of current sensor.

Large Current Electron Beam Welding Precision Shunt is a new Bus-Bar Battery Shunt resistor that has rated voltage drop 75 mV capability with 1.5 mΩ to 0.075 mΩ. Specifically, it is possible to output 75 mV from the voltage terminal with a current from 50 A to 1000 A with precision ±0.5% and ±1% tolerance in option.

Providing ultralow resistance values (to 0.01 ohm) for relatively high current requirements, new four-terminal cement filling resistors from DeMint combine the advantages of a Kelvin configuration with PC board mounting capability. The Kelvin (or four-terminal) configuration enables current to be applied through two opposite terminals and a sensing voltage to be measured across the other two terminals, eliminating the resistance and temperature coefficient of the terminals for a more accurate current measurement.

Always preferred in current sense applications, DeMint's Kelvin LRD Four Lead Resistor range is available in the 1W, 3W, 5W, 7W and 10W packages, resistance values down to 0.001 ohm, with tolerances as tight as 0.50% and TCRs of 50ppm standard.

DeMint's current sense LPS family for shunt-resistors is expected to gain wide acceptance in the worldwide market as a result of offering a variety of possibilities. The U-shaped semi-customized LPS family for direct board mounting is specified for current sensing, feedback, current detective, supper low inductance, as well as surge and pulse applications.