Product Description

NF38 Ni50%-55% PTC Ni-Fe Alloy Wire for Overcurrent Protection and Effective Temperature Regulation Resistance 0.38

NF38 Ni50%-55% PTC Ni-Fe Alloy Wire is recognized for its medium resistivity and high positive temperature coefficient of resistance, which makes it extensively used in various heating applications. This alloy can automatically control temperature and adjust power by maintaining constant current and limiting current, offering several advantages such as automatic temperature control, automatic power regulation, constant current, current limiting, energy saving, and a long practical life. Customization is also a key feature, as the wire can be tailored to meet specific requirements regarding temperature coefficient, resistivity, and diameter, making it highly adaptable to various applications.

NF38, in particular, has a resistivity at 20°C of 0.38 μΩm with a tolerance range of ±0.02, indicating its precision in electrical resistance performance. The alloy's properties render it suitable for applications where precise control of heat and power is necessary, such as in temperature-sensitive resistors and heating elements.

Key features of PTC Ni-Fe alloy with NF38 include:

High Permeability and Magnetic Properties
Soft magnetic material: It exhibits high magnetic permeability, making it suitable for use in electromagnetic components.
Low coercivity: It requires minimal energy to magnetize and demagnetize.
Excellent for transformers, magnetic shields, and other components in electrical and magnetic systems.Corrosion Resistance: The nickel content enhances the alloy’s resistance to oxidation and corrosion, making it durable in challenging environments.
Temperature Coefficient of Resistivity
Positive Temperature Coefficient (PTC): The resistivity increases with rising temperature, which is useful for temperature sensing and control applications.
Provides stability in electrical resistance over certain temperature ranges.

High Electrical Resistivity
Offers better resistance to electrical current flow compared to other magnetic alloys, which is beneficial for reducing energy losses in magnetic circuits.

Thermal Stability
Performs reliably across a wide temperature range, making it suitable for applications in varying environmental conditions.
Mechanical Properties
Good ductility and machinability allow for manufacturing into thin sheets, wires, or other forms.​
Corrosion Resistance
The nickel content enhances the alloy’s resistance to oxidation and corrosion, making it durable in challenging environments.

Magnetic cores in transformers, inductors, and chokes.

Thermistors and other temperature-sensitive devices.

Magnetic shielding for electronic devices.

Precision instrumentation where consistent magnetic properties are critical.

This alloy's combination of magnetic, thermal, and mechanical properties makes it highly valuable in industrial, electrical, and electronic applications.

Resistance Values and Naming Conventions for PTC Ni-Fe Alloy Wires

Chemical Composition of Different Models of PTC Ni-Fe Alloy Wire

Temperature Coefficients of Different Models of PTC Ni-Fe Alloy Wire

Mechanical properties (tensile strength)

Size (diameter)

Support and Services:

1. Technical Consultation

2. Product Selection

3. Time Guarantee

4. Warranty and After-Sales Support

Q&A:

1. What is the minimum order quantity?

The MOQ is 5kg, but if you need samples, please contact us.

2. Are your products safe and environmentally friendly?

Our products have passed the SGS test report, for the European Chemicals Agency and WTO concern SVHC content below the specified 0.1%, and passed the ISO9001 quality system certification.

2. How to choose products with different diameters and resistivity

We have product experts who are familiar with the use of the scenario to help determine the product, you can send email or contact us via chat software.