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Bourns Announces Four New High Power Ultra-Low Ohmic Current Sense Resistors

4.12.2023
Reading Time: 3 mins read
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Bourns is pleased to announce four new high power, ultra-low ohmic current sense resistor model series.

Bourns designed these latest current measurement devices to help power electronics developers save energy while maximizing sensing performance in their designs. The Model CSI2H-2512, CSI2H-3920, CSI2H-5930 and CSI4J-4026 feature a low Temperature Coefficient of Resistance (TCR) for operating accuracy over wide temperature ranges and excellent long-term stability.

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Their very low resistance levels, low thermal electromotive force (EMF) and high-power handling capabilities make them ideal solutions for a variety of industrial and consumer applications and power electronics including Battery Management Systems (BMS), Switched-Mode Power Supplies (SMPS) and motor drives.

The Bourns® Model CSI Series are manufactured using Electron Beam Welded (EBW) resistive material and copper alloy. These products are available in both two and four-terminal options. The two-terminal models are offered in three different footprint sizes: 5930, 3920 and 2512. The four-terminal 4026 size devices allow for very precise four-wire Kelvin (K) resistance measurement. Their metal alloy current sensing element allows for low thermal EMF and low TCRs of ±50 PPM/°C in the 20 °C to 60 °C temperature range. Both series options supply resistance values as low as 0.2 milliohms, and customers can select from a range of low resistance options and power ratings of up to 15 watts.

Current sense resistors are growing in popularity due to their high measurement accuracy and relatively low cost compared to other technologies. Bourns designed this new family of high-power current sense resistors to provide accurate measurements for higher power applications where designers need to monitor a voltage drop across the sense resistor and convert that to a current reading.

Features

  • EB Welded metal strip
  • Up to 15 W permanent power
  • Excellent long-term stability
  • Low resistance
  • Low TCR
  • Low thermal EMF
  • RoHS compliant*
  • Halogen free**
  • Bulk or tray packaging

Applications

  • DC/DC converters
  • Industrial Battery Management Systems
  • Battery chargers
  • Current sensing in bus bars
  • Welding equipment
  • Hot-swap circuits
  • Voltage division
  • Power modules
  • Frequency converters
  • Industrial

Related

Source: Bourns

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