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01 L 02 3 3 0Bourns Resistor Product Line Announces Model CSI Series
Metal Strip Shunt Resistors
Riverside, California – December 1, 2023 – 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 helppower electronics developers save energy while maximizing sensing performance in their designs. The ModelCSI2H-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. 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 andcopper 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.
This new product series complements Bourns’ other circuit conditioning components, such as its power
inductors and rectifier diodes. For further details on these exciting new models, please contact Bourns
Customer Service/Inside Sales.
- Continued -N2308
Americas: Tel +1-951 781-5500

EMEA: Tel +36 88 885 877

Asia-Pacific: Tel +886-2 256 241 17

americus@bourns.com

eurocus@bourns.com

asiacus@bourns.com

Bourns Resistor Product Line Announces Model CSI Series Metal Strip Shunt Resistors
December 1, 2023
Page 2 of 2Features

Applicationsn EB Welded metal strip
n Up to 15 W permanent powern Excellent long-term stabilityn Low resistancen Low TCRn Low thermal EMFn RoHS compliant*n Halogen free**n Bulk or tray packaging

n DC/DC convertersn Industrial Battery Management Systems
n Battery chargers
n Current sensing in bus barsn Welding equipmentn Hot-swap circuitsn Voltage divisionn Power modulesn Frequency convertersn Industrial* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and(c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.