Manganin (CuMn12Ni) Precision Shunt Wire – 0.10mm Diameter
Product Overview
Manganin (CuMn12Ni) precision shunt wire from Huona is a high-stability copper-manganese-nickel alloy, purpose-built for precision shunt resistors, current-sensing elements, and low-temperature-coefficient applications. Manufactured via vacuum melting, fine drawing, and controlled stress-relief annealing, this ultra-fine wire delivers exceptional electrical stability, near-zero temperature coefficient, and excellent long-term reliability, making it the material of choice for high-accuracy measurement and control circuits.
Domestic & International Equivalent Grades
- Alloy Grade: Manganin (CuMn12Ni)
- Standard Designations:
- GB/T 6145: CuMn12Ni
- ASTM B267: Manganin Alloy
- DIN: CuMn12Ni
- Brand Equivalents: Isabellenhucht Manganin, Driver Manganin Grade
Core Material & Dimensional Specifications
- Product Name: Manganin (CuMn12Ni) Precision Shunt Wire
- Alloy Composition: Cu ~86%, Mn ~12%, Ni ~2% (strict impurity control)
- Standard Diameter: 0.10mm (customizable: 0.03–0.50mm)
- Diameter Tolerance: ±0.003mm
- Form: Bare bright wire wound on plastic spools (standard length: 2000m/spool)
- Surface Condition: Annealed, oxide-free, bright copper finish
- Packaging: Sealed anti-oxidation spool packaging with moisture-proof wrapping
Electrical & Physical Performance Parameters
- Resistivity (20°C): ~0.45 Ω·mm²/m
- Temperature Coefficient of Resistance (TCR): ≤ ±15 ppm/°C (0–100°C)
- Maximum Operating Temperature: 150°C (continuous use)
- Thermal EMF vs. Copper: ≤ 1 µV/°C
- Tensile Strength: ≥500 MPa (annealed)
- Elongation: ≥15%
- Density: ~8.4 g/cm³
- Magnetic Property: Non-magnetic
Key Differentiating Advantages
1. Ultra-Stable Resistance with Near-Zero TCR
Manganin wire offers an extremely low temperature coefficient of resistance (≤ ±15 ppm/°C), ensuring minimal resistance drift even under significant temperature fluctuations. This stability is critical for precision shunt resistors and current-sensing elements, where accurate, consistent measurements are essential.
2. Extremely Low Thermal EMF vs. Copper
With a thermal EMF of ≤ 1 µV/°C against copper, Manganin eliminates measurement errors caused by thermoelectric effects at junctions. This makes it ideal for high-accuracy multimeters, wattmeters, and precision power measurement circuits.
3. Excellent Long-Term Stability & Aging Resistance
The alloy’s refined microstructure provides exceptional resistance to aging and thermal drift, maintaining consistent resistance values over thousands of operating hours. This eliminates the need for frequent calibration in critical measurement systems.
4. Superior Formability for Fine Winding
The wire exhibits good ductility and workability, making it suitable for ultra-fine winding in precision resistors and potentiometers. It maintains consistent mechanical properties even after repeated bending, supporting high-volume production of tiny, dense winding components.
5. Good Solderability & Corrosion Resistance
The bright copper finish is easy to tin and solder, ensuring reliable connections in electronic assemblies. The alloy also offers good resistance to atmospheric corrosion and moisture, extending service life in industrial and laboratory environments.
Technical Parameter Table
| Attribute |
Typical Specification |
| Alloy Grade |
Manganin (CuMn12Ni) |
| Standard Diameter |
0.10mm (±0.003mm) |
| Resistivity (20°C) |
~0.45 Ω·mm²/m |
| TCR Coefficient |
≤ ±15 ppm/°C |
| Thermal EMF vs. Copper |
≤ 1 µV/°C |
| Max Operating Temperature |
150°C |
| Tensile Strength |
≥500 MPa |
| Elongation |
≥15% |
| Surface Finish |
Annealed bright copper |
| Packaging Form |
2000m/Plastic Spool |
Supply & Packaging Standard
- Supply Form: Bare Manganin wire on plastic spools; custom diameters, lengths, and tin-plated finishes available
- Packaging: Anti-oxidation isolation paper + sealed plastic bag + standard export spool packaging, moisture-proof and dust-proof
- MOQ: Small sample order available; bulk industrial orders supported
- Custom Service: Special tolerances, ultra-fine wire drawing, and surface treatments can be customized according to customer specifications
Typical Application Scope
- Precision Shunt Resistors: High-accuracy current-sensing resistors for multimeters, wattmeters, and power measurement instruments.
- Wire-Wound Precision Resistors: Stable resistive elements for laboratory equipment, calibration standards, and control circuits.
- Potentiometers & Rheostats: Precision winding wires for variable resistors requiring consistent resistance values.
- Battery Management Systems (BMS): Low-drift current-sensing elements for lithium-ion battery packs and charging systems.
- Industrial Controls: Temperature-compensated resistive elements in automation equipment and process control systems.
