SMD Shunt Resistor for PCB Current Sensing in Power & Industrial Applications
Description
SMD Shunt Resistor for PCB Current Sensing
This SMD shunt resistor is designed for accurate current sensing on PCB boards in power supplies, battery management systems (BMS), and industrial electronics. It offers low resistance, high precision, and stable performance in compact designsPCB mount shunt resistor is designed for high-accuracy current sensing in compact SMD layouts. Ideal for applications requiring stable performance and precise measurement, this resistor is available in various standard footprints such as 1206, 1575,2010, 2512, and more.
Product Features of PCB-Mounted Shunts:
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Resistance Range: 0.1mΩ to 100mΩ
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Tolerance: ±1% / ±0.5% / ±0.25%
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TCR (Temperature Coefficient): < ±75 ppm/°C
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Rated Power: Up to 3W (depending on size)
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Mounting: Surface Mount (SMD) for easy integration on PCB
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Material: Metal strip / alloy element for low thermal EMF
Common Problems in PCB Current Sensing
- Inaccurate current measurement in compact circuits
- Excess heat affecting PCB performance
- Resistance drift under temperature changes
- Limited space for high-current components
How This SMD Shunt Resistor Solves Them
- Low resistance design for precise current sensing
- Compact SMD package saves PCB space
- High thermal stability ensures consistent performance
- Suitable for high-density electronic designs
Product Size
| Series | Package | Power | Resistance (min) | Resistance (max) | Tolerance | TCR (ppm/°C) | Part / Variant |
|---|---|---|---|---|---|---|---|
| LRS | 2512 | 3W – 6W | 0.1 mΩ | 1 mΩ | ±0.1%, ±0.2%, ±0.5%, ±1%, ±2%, ±5% | ±15 – ±75 | LRS2512 |
| LRS | 1206 | 1W – 2W | 0.5 mΩ | 3 mΩ | ±0.1% … ±5% | ±15 – ±75 | LRS1206 |
| LRS | 6568 | 5W – 7W | 0.1 mΩ | 0.2 mΩ | ±0.1% … ±5% | ±15 – ±75 | LRS6568 |
| LRS | 1575 (5930) | 7W – 15W | 0.1 mΩ | 1 mΩ | ±0.1% … ±5% | ±15 – ±75 | LRS1575 / LRS5930 |
| LRS | 1050 (3920) | 5W – 12W | 0.1 mΩ | 1 mΩ | ±0.1% … ±5% | ±15 – ±75 | LRS1050 / LRS3920 |
Notes: Tolerance options and exact resistance ranges depend on the specific part variant—please consult the datasheet for exact values.
Electrical performance:
| Parameter | Value |
|---|---|
| Resistance Values (mR) | 0.1 to 4 |
| Rated Power (W) | 7 |
| Accuracy (%) | 0.5 to 5 |
| TCR (ppm/℃) | 25~50 |
| Operating Temperature Range | -50℃ ~ +170℃ |
| Inductance (nH) | <10 |
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Typical Applications
- Power supply circuits
- Battery management systems (BMS)
- DC-DC converters
- Inverters and energy systems
- Industrial control electronics
- Widely used in compact electronic systems and high-efficiency power designs
The resistor follows standard current sensing principles widely used in electronic circuits.
For additional technical reference, see surface-mount technology and shunt resistor fundamentals
PCB Layout Guidelines (Optional)
Package 
Need a Custom SMD Shunt Resistor?
- Custom resistance values available
- Engineering support for your PCB design
- Fast sampling and production
