Manganese Copper Shunt vs Hall Sensor for DC Current Sensing
How to Measure High DC Current Accurately
High DC currents — in EV charging piles, energy storage systems and inverters — need accurate, reliable current measurement for metering, battery management and protection.
Two approaches dominate the market: shunt resistors (manganese copper shunts) and Hall effect sensors. This guide compares them so you can choose the right one for accuracy, cost and reliability.
The Two Technologies at a Glance
| Manganese Copper Shunt | Hall Effect Sensor | |
|---|---|---|
| Principle | Measures voltage drop across a precision low-resistance shunt (Ohm's law) | Measures magnetic field produced by current |
| Accuracy | High, especially at DC | Moderate, affected by drift |
| Temperature stability | Excellent (very low temperature coefficient) | Temperature drift needs compensation |
| Linear measurement | Naturally linear | Needs calibration |
| Cost | Lower | Higher |
| Hysteresis | None | Possible |
| Size / weight | Compact, light | Larger, heavier |
When to Choose a Manganese Copper Shunt
Choose a manganese copper shunt when you need:
- High measurement accuracy at DC current — shunts measure the real voltage drop
- Excellent temperature stability — manganese copper alloy has a very low temperature coefficient, so readings stay stable
- Low cost — simpler and cheaper than a Hall sensor
- No hysteresis / linear measurement — natural linear response
- Compact design — small and light for tight battery/charging modules
This is why manganese copper shunts are the preferred, conventional choice for charging piles and battery current sampling — where accuracy and cost both matter.
When a Hall Sensor Might Suit Better
- When you need galvanic isolation between the current path and the measurement circuit
- When measuring very high currents where shunt power loss becomes significant
- When you can tolerate its cost and temperature calibration
Quick Decision Checklist
- Need high DC accuracy and low cost → Shunt
- Need isolation from the power path → Hall
- Concerned about heat in a high-current busbar → consider shunt sizing or Hall
- Building charging piles / BMS current sampling → Shunt is the conventional, proven choice
A Reliable Source for Manganese Copper Shunts
At Dongguan Dinghao Electronics, we manufacture precision manganese copper shunts — the MCS Series:
- MCS-75 — 50mV typical, suitable for high-accuracy current sampling
- MCS-100 — compact, high-precision current sensing
They deliver high accuracy, excellent temperature stability and low cost, and are available in custom current and voltage ratings to match your charging pile or energy storage design.
Contact UsMr. Gong · Tel/WhatsApp +86 139 2944 6882 · www.dgdinghao.com.cn. This is a general engineering reference. Always confirm technical specifications and isolation requirements with your supplier before ordering.