Bourns New Current Sense Resistor Models Add 0.1 Milliohm Option Supporting Voltage Integrity in High-Current Applications
The eight new 15 W, ultra-low resistance models extend current sensing capabilities for automotive and industrial power designs
Bourns, Inc. today introduced an eight-model extension of its CSS2H-5930 and CSI2H-5930 Series current sense resistors that feature 0.1 milliohm (mΩ) resistance values and 15 W power ratings that meet precision current sensing requirements in high-current applications. The new models combine an electron-beam-welded metal strip design with low inductance and low thermal EMF characteristics to support accurate current measurement while minimizing power loss.
Designers of battery-powered, power-conversion and high-current control systems continue to face pressure to increase efficiency while reducing heat generation and preserving measurement accuracy. In these applications, excessive voltage drop across a sensing element can reduce system efficiency and complicate thermal management. The new 0.1 mΩ models address these constraints by providing ultra-low resistance in a compact surface-mount package while maintaining a 15 W power rating and low inductance characteristics. Within the CSS2H-5930 Series, the Model CSS2H-5930R-L100x is also AEC-Q200 compliant and automotive grade.
“Current sensing circuits in automotive and industrial power systems often require very low resistance values to minimize power dissipation while maintaining accurate measurement capability,” said Walter Garcia, Product Line Manager - Resistors, Bourns. “The addition of a
0.1 mΩ value to the new models added to CSS2H-5930 and CSI2H-5930 Series give designers another option for high-current applications that require a 15 W rating, low inductance and long-term stability. The CSS2H Series also provides a model with AEC-Q200 compliance and automotive grade qualification.”
Design Features
- EB welded metal strip
- Very high power
- Excellent long-term stability
- Low resistance, low TCR
- Low thermal EMF
- RoHS compliant* and halogen free**
- AEC-Q200 compliant (CSS2H-5930)
- Automotive grade (CSS2H-5930)
Electrical Specifications
|
Parameter |
CSS2H-5930R-L100x |
CSI2H-5930R-L100x |
|
Resistance Value |
0.1 mΩ |
0.1 mΩ |
|
Power Rating @ 70 °C |
15 W |
15 W |
|
Operating Temperature Range |
-55 °C to +170 °C |
-55 °C to +170 °C |
|
TCR, Resistive Alloy (20 °C-60 °C) |
±50 ppm/°C |
±50 PPM/°C |
|
Temperature Coefficient Including Copper Terminals (20-60 °C) |
±275 ppm/°C |
±275 PPM/°C |
|
Inductance |
< 3 nH, Material Type R |
< 3 nH, Material Type R |
|
Resistance Tolerance |
±1 %, ±5 % |
±1 %, ±2 %, ±5 % |
Target Applications
· Current sensing
· Voltage division
· Battery management systems (CSS2H-5930R-L100x)
· Power modules
· Frequency converters
· Industrial power systems
Availability
The new current sense resistor models added to the Bourns® CSS2H-5930 and CSI2H-5930 Series are available now through Bourns’ authorized distribution network. Full specifications and ordering information are available at Bourns Current Sense Resistors/Shunts.
