NF20 PTC Ni-Fe Alloy Wire with Positive Temperature Coefficient for Electronics Aerospace and Automotive
PTC Ni-Fe Alloy NF20 Wire Widely Used in Electronics Aerospace and Automotive Industries for its Exceptional Performance, Resistivity 0.20
| Main Chemical Composition Wt.% NF20 PTC Ni-Fe Alloy | % | Ni | Fe |
| Min | 70 | ||
| Max | 75 | Bal. |
Some key features of PTC Ni-Fe alloy NF20 include:
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Positive Temperature Coefficient (PTC):
- Exhibits increased electrical resistivity with rising temperature, making it ideal for temperature sensing, current regulation, and circuit protection applications.
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Magnetic Properties:
- High magnetic permeability and low coercivity enable efficient performance in soft magnetic applications such as transformers, inductors, and magnetic cores.
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High Electrical Resistivity:
- Minimizes energy losses in magnetic circuits and enhances the efficiency of electronic systems.
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Thermal Stability:
- Provides reliable performance across a wide temperature range, ensuring stable electrical and magnetic properties.
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Corrosion Resistance:
- The nickel content offers enhanced resistance to oxidation and corrosion, extending the material’s lifespan in harsh environments.
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Mechanical Versatility:
- Good ductility and machinability allow the alloy to be processed into various forms, including wires, strips, and custom shapes, for diverse applications.
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Wide Application Range:
- Used in temperature-sensitive devices, overcurrent protection systems, magnetic shielding, heating elements, and precision electronic components.
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Durability and Reliability:
- Combines thermal, magnetic, and resistive stability with long-lasting performance for industrial, automotive, and electronic applications.
NF20’s balance of nickel content, thermal stability, and magnetic efficiency makes it a versatile and reliable alloy for applications requiring precision and durability.
Applications of PTC Ni-Fe alloy NF20 include:
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Temperature Sensing and Control:
- Used in thermistors and temperature-sensitive resistors for accurate temperature monitoring and regulation in industrial, automotive, and electronic systems.
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Overcurrent Protection:
- Functions as a current limiter by increasing resistance with rising temperature, protecting sensitive electronic components from damage due to overcurrent.
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Magnetic Cores:
- Ideal for use in soft magnetic cores for transformers, inductors, and chokes, offering high permeability and efficient energy transfer with minimal losses.
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Magnetic Shielding:
- Provides shielding for sensitive electronic devices, protecting them from external magnetic interference in industrial and consumer applications.
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Industrial Heating Systems:
- Integrated into self-regulating heating elements for precise temperature control and energy-efficient operation in industrial and domestic settings.
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Automotive Electronics:
- Used in resistors, sensors, and protection devices within automotive systems, ensuring reliable operation under varying temperature conditions.
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Consumer Electronics:
- Found in household appliances for circuit protection and temperature regulation to prevent overheating or electrical faults.
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Power and Renewable Energy Systems:
- Utilized in magnetic and resistive components for inverters, converters, and other power electronics to ensure stability and efficiency.
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Precision Instrumentation:
- Applied in high-accuracy sensors, control devices, and other instruments requiring stable magnetic and resistive properties over a wide temperature range.
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Aerospace and Defense Applications:
- Suitable for use in high-performance systems where thermal stability, magnetic efficiency, and durability are critical.
NF20’s combination of PTC behavior, magnetic efficiency, and thermal stability makes it a versatile material for diverse applications requiring precision, reliability, and durability.
Resistance Values and Naming Conventions for PTC Ni-Fe Alloy Wires
| Alloy brand | 20℃ Resistivity | The tolerance range | ||||
| NF13 | 0.13 | ±0.02 | ||||
| NF15 | 0.15 | ±0.02 | ||||
| NF20 | 0.20 | ±0.02 | ||||
| NF23 | 0.23 | ±0.02 | ||||
| NF25 | 0.25 | ±0.02 | ||||
| NF32 | 0.32 | ±0.02 | ||||
| NF36 | 0.36 | ±0.02 | ||||
| NF38 | 0.38 | ±0.02 | ||||
| NF40 | 0.40 | ±0.02 | ||||
| NF43 | 0.43 | ±0.02 | ||||
| NF46 | 0.46 | ±0.02 | ||||
| NF52 | 0.52 | ±0.02 | ||||
| NF60 | 0.60 | ±0.02 | ||||
Chemical Composition of Different Models of PTC Ni-Fe Alloy Wire
| Alloy brand | Chemical element | ||||
| Ni % | Fe % | ||||
| NF13 | 85-95 | Rest | |||
| NF15 | 75-85 | Rest | |||
| NF20 | 70-75 | Rest | |||
| NF23 | 60-65 | Rest | |||
| NF25 | 60-65 | Rest | |||
| NF32 | 50-55 | Rest | |||
| NF36 | 50-55 | Rest | |||
| NF38 | 50-55 | Rest | |||
| NF40 | 50-55 | Rest | |||
| NF43 | 45-50 | Rest | |||
| NF46 | 45-50 | Rest | |||
| NF52 | 45-50 | Rest | |||
| NF60 | 45-50 | Rest | |||
Temperature Coefficients of Different Models of PTC Ni-Fe Alloy Wire
| Alloy brand | 120℃ Temperature coefficient PPM | The tolerance range PPM | ||||||||||||
| NF13 | 4200 | ±300 | ||||||||||||
| NF15 | 4400 | ±300 | ||||||||||||
| NF20 | 4500 | ±300 | ||||||||||||
| NF23 | 4800 | ±300 | ||||||||||||
| NF25 | 4600 | ±300 | ||||||||||||
| NF32 | 4200 | ±300 | ||||||||||||
| NF36 | 3800 | ±300 | ||||||||||||
| NF38 | 4000 | ±300 | ||||||||||||
| NF40 | 3800 | ±300 | ||||||||||||
| NF43 | 3400 | ±300 | ||||||||||||
| NF46 | 3200 | ±300 | ||||||||||||
| NF52 | 3000 | ±300 | ||||||||||||
| NF60 | 2500 | ±300 | ||||||||||||
Mechanical properties (tensile strength)
| Category | Diameter range mm |
Elongation rate ≥ % |
|
| Cold drawn wire | 0.05 ＞ d ＜ 0.1 | ≥ 18 | |
| 0.1 ＞ d ＜ 0.3 | ≥ 20 | ||
| 0.3 ＞ d ＜ 0.5 | ≥ 20 | ||
| 0.5 ＞ d ＜ 1.0 | ≥ 20 | ||
Size (diameter)
| Alloy Code | Diameter mm | |||||
| Wire | Rod | Wire rod | ||||
| NF13 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF15 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF20 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF23 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF25 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF32 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF36 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF38 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF40 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF43 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF46 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF52 | 0.05-8.0 | 12-30 | 8-14 | |||
| NF60 | 0.05-8.0 | 12-30 | 8-14 | |||
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