Current sensing resistors must balance the efficiency requirements of low resistance values, and high current handling with the precision and accuracy requirements of the sensing circuit. But the key requirement of most current sensing circuits is stable performance over temperature. Component TCR is the key measurement parameter for the temperature stability of a resistor. Stackpole […]
Resistors
Current-sensing resistor handles 7 W
Power electronic engineers continue to push for higher power, lower values, and better precision. Most common resistor technologies cannot adequately meet all three requirements, but Stackpole’s CSS/CSSH Series is able meet these demands in a variety of sizes, power ratings and values. Stackpole’s latest addition is its 3637 high-power shunt. The CSSH3637 is a 7W […]
High current metal shunt for hybrid power sources
As power electronics evolve, the requirements for high current, low resistance sensing resistors continue to increase. Emerging applications, such as hybrid power systems, may require high power, high accuracy, and low thermal resistance. These are a difficult combination for many traditional sense resistor technologies. Stackpole’s HCS series provides high power, precise sensing, and low thermal […]
Wide terminal thick-film chip resistors handle up to 3 W
Applications for surface mount chip resistors with high power requirements typically mean higher circuit temperatures due to thermal resistance limitations. One of the most common and economical options for reducing the effects of high power is wide terminations. By reversing the geometry of the chip resistor and applying the terminations to the long sides of […]
Thick-film chip resistors excel at handling high power levels
The RPC-UP from Stackpole offers 0805 and 1206 size chip resistors with excellent pulse withstanding and high-power ratings. The RPC0805-UP is rated at 0.5W and 400V working voltage and the RPC1206-UP is rated at 0.75W and 500V. Resistance values range from 1 ohm to 1Meg ohm with tolerances from 20% to 0.5% available for some resistance values. The […]
Flame-proof wirewound resistors target in-rush apps
TT Electronics announced the availability of its high surge, UL-recognised, fusible resistor family – the WHS-UL Series. Developed for inrush control applications, such as power supplies, UPS, energy metering, and motor drives, TT’s WHS-UL resistors offer enhanced surge and pulse energy withstand capability. A UL1412-recognised fusible resistor (UL file E234469), the WHS-UL provides failsafe fusing at […]
Four-terminal shunt resistor provides low-resistance, high-accuracy current sensing
Stackpole’s CSSK3637 is a four-terminal shunt that provides very low resistance values which have been expanded to 0.5 to 6 milliohms, in tolerances as low as 0.5% and TCR of 50 ppm. In addition, this all-metal shunt has an operating temperature up to 170C, providing excellent stability for a wide range of end products. The […]
High-current shunt resistors offer a 5-W power rating
Modern electronics utilize current sense resistors for portable power management. As larger and more powerful devices become portable, higher currents and higher power ratings become critical, however, space for any portable electrical device must always be conserved. The HCSM2818 from Stackpole offers a 5-watt continuous power rating to maximize power handling in a given PCB […]
SMT Kelvin shunt resistors provide accurate sub-milliohm current sensing
TT Electronics announced its LRMAP4026 series low resistance metal alloy power resistors designed for power supply, motor drive, and battery monitoring applications. This resistor series provides four-terminal Kelvin precision and high current capacity to all industrial applications, including automotive. Because four-terminal Kelvin connections improve precision, only a small portion of a design’s error budget is […]
How trimming affects thick-film resistor performance
Ordinary thick-film resistors can display varying qualities depending on how the manufacturer elected to trim the device. It pays to know what to look out for. Kory Schroeder, Stackpole Electronics Inc. Surface-mount thick-film chip resistors are the predominant type of resistor in electronic circuits today. This technology is inexpensive; thick-film resistors are produced by screen-printing […]
