Product Overview
Our Electronic Potting for Positive Coefficient Thermistors is a professional Silicone Potting Compound developed for the encapsulation, sealing, temperature response protection and insulation of Positive Coefficient (PTC) Thermistors. As a leading manufacturer of electronic Potting Compound and silicone raw materials, we optimize the formula for PTC thermistors’ core needs—resistance-temperature response precision retention, efficient heat conduction and thermal stability. Unlike ordinary potting silicones, it has excellent thermal conductivity and low modulus, does not interfere with the PTC thermistor’s resistance-temperature characteristics, cures without shrinkage, resists high-temperature aging and corrosion, and has excellent adhesion to PC, PMMA, PCB and thermistor metals, protecting internal PTC components, ensuring reliable overcurrent and overheat protection performance for procurement partners.
Key Features & Advantages
1.Resistance-Temperature Response Precision Protection: Low modulus and thermally conductive formula, no interference with the PTC thermistor’s resistance-temperature (R-T) characteristics, ensuring accurate resistance change with temperature, avoiding response deviation or failure; excellent thermal conductivity facilitates rapid heat transfer, ensuring the thermistor responds timely to temperature changes and achieves reliable overcurrent protection.
2.Superior Temperature Stability & Thermal Cycle Resistance: Operating stably from -60℃ to 220℃, with outstanding high and low temperature resistance, no curing failure or performance degradation in repeated thermal cycles; the cured colloid can absorb stress caused by thermal expansion and contraction, protecting the PTC chip from damage, extending the thermistor’s service life and stability.
3.Ultra-High Insulation & Efficient Heat Dissipation: Integrated thermally conductive potting compound properties efficiently dissipate excess heat during overcurrent protection, avoiding overheating accumulation; ultra-strong insulation performance (dielectric strength ≥25 kV/mm, volume resistivity ≥1.0×10¹⁶ Ω·cm), effectively isolating internal circuits, preventing leakage and short circuits, ensuring safe operation of PTC thermistors.
4.Strong Adhesion & Corrosion Resistance: Excellent adhesion to PC (electronic insulation board), PMMA (acrylic), PCB, PTC thermistor metals (copper, nickel, silver) and plastic housings, forming a tight seal without detachment; resistant to high-temperature aging, ozone and chemical erosion, avoiding material degradation and thermistor failure; two-component design, easy to mix evenly, optional vacuum defoaming (0.01MPa for 3 minutes), supports room temperature or heated curing, full curing in 24 hours, suitable for batch production.
5.High Stability & Dual-Formula Options: Available in high-purity addition curing silicone (low volatility, non-toxic, high stability) and enhanced thermally conductive potting compound (for high-power PTC thermistors), meeting different application needs; low volatility, high strength, no stratification after long-term storage (stir before use without affecting performance); mixed glue can be used up at one time, reducing waste and procurement costs.
How to Use (Step-by-Step Guide)
1.Pre-Mixing Preparation: Fully stir Component A in its container to mix the settled filler evenly, and shake Component B thoroughly to ensure uniform consistency, avoiding affecting curing effect, insulation and adhesion to thermistor components, which is crucial for resistance-temperature response precision.
2.Mixing: Mix Component A and Component B according to the specified weight ratio (customizable), stir slowly and evenly to avoid generating air bubbles, which may affect insulation, heat conduction and R-T response performance of PTC thermistors.
3.Degassing (Optional): Put the mixed potting compound into a vacuum container, degas at 0.01MPa for 3 minutes to completely eliminate air bubbles, then pour it into PTC thermistor packaging molds or casings, avoiding overflow that affects the thermistor’s performance.
4.Curing: Place the encapsulated PTC thermistor at room temperature for curing or heat to accelerate curing; enter the next process after basic curing, and full curing takes 24 hours. Note: Environment temperature and humidity significantly affect curing speed and final thermal performance.
Application Scenarios
This specialized electronic potting compound and silicone encapsulant is mainly used for encapsulation, sealing, temperature response protection and insulation of various Positive Coefficient Thermistors. It is widely applied in power supplies, automotive electronics, household appliances, industrial control systems, battery packs, LED lighting and electronic protection devices. It ensures reliable resistance-temperature response and stable operation of PTC thermistors in harsh environments, reduces failure rates caused by temperature cycles, moisture, dust and corrosion, extends service life, and helps procurement partners reduce production costs and enhance product competitiveness.
Technical Specifications
Type: Addition-Curing & Thermally Conductive Electronic Potting Silicone; Mix Ratio (A:B): Customizable (weight ratio); Appearance: Transparent/Light Transparent Liquid (both components); Viscosity: Customizable; Working Time: Customizable; Curing Time: 24 hours (full, room temp/heated optional); Operating Temperature: -60℃ to 220℃; Dielectric Strength: ≥25 kV/mm; Volume Resistivity: ≥1.0×10¹⁶ Ω·cm; Adhesion: Excellent (PC, PMMA, PCB, thermistor metals); Shrinkage Rate: ≤0.1%; Thermal Conductivity: Customizable; Volatility: Minimal; Compliance: EU RoHS; Shelf Life: 12 months (sealed storage); Non-hazardous; Thermal cycle resistant; Customizable parameters available.
Certifications & Compliance
Our Electronic Potting for Positive Coefficient Thermistors complies with international standards: ISO 9001 (strict quality control), CE Certification, EU RoHS Directive, meeting global PTC thermistor production requirements, trusted by global electronic component manufacturers and procurement partners.
Customization Options
We provide PTC thermistor-specific customization: adjust viscosity, hardness, curing speed, insulation performance, thermal conductivity and shrinkage rate; choose between addition curing silicone and thermally conductive potting compound; optimize adhesion and thermal conductivity for thermistor metals and packaging materials; flexible parameter adjustment to match different thermistor sizes, resistance ranges and working environments, meeting small-batch and large-scale production needs.
Production Process & Quality Control
We implement a strict 5-step quality control process: high-purity silicone raw materials screening, precision automated mixing, performance testing (insulation, adhesion, thermal conductivity, temperature stability), curing verification, and sealed packaging. Monthly capacity exceeds 500 tons, supporting stable global supply; non-hazardous, transportable as general chemicals.
FAQ
Q: Is it suitable for all types of positive coefficient thermistors?
A: Yes, it can be customized for different sizes, resistance ranges and working environments of PTC thermistors, with good compatibility and no impact on resistance-temperature response precision.
Q: What’s the difference between the two formula options?
A: Addition curing silicone is ideal for general PTC thermistors; thermally conductive type is for high-power models needing efficient heat dissipation.
Q: How to store the product?
A: Seal and store, shelf life is 12 months; stir evenly before use if stratified, no impact on performance.
Q: Is it hazardous?
A: No, it is non-hazardous and can be transported as general chemicals.
Q: What if it gets into eyes or mouth?
A: Rinse with clean water immediately or seek medical attention.
Shenzhen Hong Ye Jie Technology Co., Ltd
Contact Now
