Best Practices for Handling and Storing PTC Devices

2024-07-05

When Coating and Potting the PTC thermistor, mechanical stress is not allowed due to the different thermal expansion in the processing of solidifying and after processing.

Table of Contents

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Introduction of Essential Practices for Handling and Storing PTC Devices
1. Cleaning PTC Devices 
2. Welding Requirements of PTC Thermistors
3. Coating and Potting Guidelines of ptc ceramic elements
4. Storage Conditions of PTC Devices

Introduction of Essential Practices for Handling and Storing PTC Devices

For optimal performance and longevity, proper handling and storage of PTC Devices, especially including PTC Thermistors and ptc ceramic elements, are essential. Adhering to these guidelines ensures that your PTC Devices function reliably over time, minimizing potential issues related to improper care.

1. Cleaning PTC Devices

When cleaning PTC Thermistors, it's important to use suitable cleaning agents. Approved cleaners include Freon, trichloroethane, or tetrachloroethylene. Ultrasonic cleaning can also be used; however, be cautious as some detergents may damage the PTC Thermistors 's performance. Always ensure that the cleaning method does not negatively affect the device’s functionality.

2. Welding Requirements of PTC Thermistors

Welding Method	Temperature (Max)	Time (Max)	Distance from PTC Thermistor (Min)
Dip Soldering of ptc ceramic elements	260°C	10 seconds	6 mm
Iron Welding	360°C	5 seconds	6 mm

During welding, it is critical to avoid excessive heat exposure, which can alter the resistance values of the PTC Thermistors. Maintaining the correct distance from the welding point and adhering to the recommended temperature and time limits will help preserve the integrity of the PTC Thermistors.

3. Coating and Potting Guidelines of ptc ceramic elements

Coating and potting are common practices in PTC Devices to protect components, but they require careful execution. Mechanical stress during the solidification process can lead to damage due to differences in thermal expansion. It’s vital to use chemically neutral potting materials and to keep the curing temperatures within the recommended range. Exceeding the upper temperature limit can reduce resistance and impair the electrical properties of the PTC Thermistors, potentially leading to overheating and device failure.

4. Storage Conditions of PTC Devices

Proper storage of PTC Thermistors is crucial to maintain their quality and functionality:

Original Packaging: Store PTC Devices in their original packaging to avoid contamination.
Environment: Ensure storage areas are free from corrosive atmospheres and maintain stable humidity and temperature levels.
Handling: Avoid touching the metal cladding of unwelded ptc ceramic elements to prevent degradation in solderability.
Longevity: ptc ceramic elements can be preserved long-term if stored under ideal conditions. However, exposure to high humidity or temperatures may affect solderability and other performance characteristics.

Following these best practices for handling and storage ensures that PTC Devices, remain in peak condition, delivering reliable performance over their lifespan. These guidelines not only protect the devices but also enhance your product's reliability and market competitiveness.

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