Compact High-Power Resistors For Current Sensing

The resistors help with accurate current sensing in applications like electric vehicles, power tools, HVAC controls, and power supplies.

Shunt resistors must balance low resistance with high power handling to achieve efficient current sensing. However, finding resistors that offer a high power-to-size ratio and cost-effectiveness can be challenging. Stackpole’s CSNL2512 series solves this by providing a 3-watt power rating in a compact form, with low TCR and resistance values starting at 0.2 milliohms. This combination of performance and affordability makes the CSNL2512 a strong choice for demanding applications. The series suits applications such as electric vehicles, power tools, HVAC controls, instrumentation, power supplies, networking, and communications equipment.

Electric vehicle manufacturers can use these resistors in battery management systems or inverter controls for accurate current measurement. Power tool manufacturers can benefit from stable current sensing to improve motor control, tool performance, and safety. HVAC equipment manufacturers rely on these resistors for efficient power management and reliable operation in HVAC controls. Power supply manufacturers can use them to monitor and control power delivery, ensuring stability and efficiency. 

– Advertisement –

The AEC-compliant CSNL2512 offers key benefits, including high stability with less than 1% resistance change in standard tests such as load life, short-time overload, and biased humidity, as well as high power density, which ensures reliable performance in compact designs, reducing system size and weight.

A few key features of the CSNL2512 series include:

• High-power current sense resistor
• Resistances down to 0.0002Ω
• “-3W” special 3W power rating
• 100% RoHS compliant and lead-free without exemption
• Halogen-free
• REACH compliant
• AEC-Q200 compliant

The pricing of the CSNL2512 varies based on the resistance value and tolerance. Stackpole Electronics Inc. is a global manufacturer of resistors.