PTC Alloy wire has medium resistivity and a high positive temperature coefficient of resistance. It is widely used in various heaters. It can automatically control temperature and adjust power by keeping constant current and limiting current. PTC alloy has many advantages such as automatic temperature control, automatic power regulation, constant current, current limiting, energy saving and long practical life.
What is PTC Wire?
PTC (Positive Temperature Coefficient) wire refers to a type of wire or heating element that exhibits a unique property: its electrical resistance increases with temperature. This characteristic makes PTC wires self-regulating, which means they automatically reduce their power output as they heat up, preventing overheating and enhancing safety.
| Code | Nickel Content % | Resistivity at 20°C | Temperature Coefficient(ppm/°C) |
| NF13 | 85-95 | 0.13 | 4300 |
| NF15 | 75-85 | 0.15 | 4400 |
| NF20 | 70-75 | 0.20 | 4200 |
| NF23 | 60-65 | 0.23 | 4600 |
| NF25 | 60-65 | 0.25 | 4500 |
| NF32 | 50-55 | 0.32 | 4100 |
| NF36 | 50-55 | 0.36 | 3600 |
| NF38 | 50-55 | 0.38 | 3900 |
| NF40 | 50-55 | 0.4 | 3500 |
| NF43 | 45-50 | 0.43 | 3300 |
| NF46 | 45-50 | 0.46 | 3200 |
| NF52 | 45-50 | 0.52 | 2200 |
| NF60 | 45-50 | 0.60 | 2500 |
Key Characteristics of PTC Wire:
Self-Regulating: As the temperature rises, the resistance increases, leading to a decrease in current and power, thus preventing the wire from overheating.
Energy Efficiency: PTC wires adjust their power output based on the surrounding temperature, making them more energy-efficient compared to constant-resistance heating elements.
Safety: The self-limiting nature of PTC wires ensures that they don't overheat, reducing the risk of fire and other hazards.
Dynamic Power Adaptation: PTC wires can adapt their heating power based on the heat extraction rate. When more heat is extracted, they produce more heat, and when less heat is needed, they produce less.
Applications:
Heating Elements: Used in various heating applications, including room heaters, automotive seat heaters, and industrial heaters.
Electronic Devices: Provides temperature control in electronic circuits, ensuring components operate within safe temperature ranges.
Safety Devices: Acts as a fail-safe in devices, shutting off the heating element when a certain temperature is exceeded.
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PTC wires are widely used due to their safety features and energy efficiency, making them ideal for applications where controlled heating is essential.
