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Case Overview

This case shows how HN-8806A/B silicone potting compound from Shenzhen Hanast New Materials Co., Ltd. helps EV charging pile manufacturers in North America build equipment that survives extreme climates and meets rigorous electrical safety expectations. With fast-charging networks expanding across the United States and Canada, charging pile makers need encapsulation that protects high-power modules from cold winters, hot summers and continuous high-voltage operation.

Customer Background

The customer is a North American EV charging equipment manufacturer producing DC fast chargers, AC charging piles and power distribution modules for public networks and commercial fleets. Charging stations operate in demanding conditions:

• Winter temperatures below -30°C in Canada and the northern United States;
• Summer enclosure temperatures above 60°C for high-power DC chargers;
• High humidity, road salt spray and ice-melt chemicals near installations;
• Continuous high-voltage operation at 480 V and above with frequent load changes;
• Safety inspections referencing UL 94 and related flame-retardant criteria.

Challenge

Charging modules switch high currents and generate significant heat, while outdoor installations expose electronics to moisture, salt and thermal extremes. The manufacturer previously experienced field failures caused by cracked encapsulation and moisture ingress. It needed a potting compound that would insulate high-voltage sections reliably, transfer heat to cooling surfaces, withstand thermal shock from -30°C to operating temperature, and support rapid production scale-up as charging networks grew.

Solution: HN-8806A/B Silicone Potting Compound

HN-8806A/B, an addition-cure two-component silicone potting compound, was selected for its balanced combination of electrical, thermal and mechanical performance. It cures into a grey elastomer with no exotherm and no by-products, protecting sensitive power electronics during and after cure. Key technical data:

Why HN-8806A/B Meets North American Charging Requirements

• Climate resilience: reliable from -50°C to 250°C covers Canadian winters and summer heat soak inside charger enclosures;
• High-voltage safety: 25-30 kV/mm dielectric strength and 10¹&sup6 Ω·cm volume resistivity protect 480 V power sections and communication electronics;
• Heat dissipation: ≥0.76 W/m·K thermal conductivity couples power modules to heatsinks and cabinet cooling;
• Moisture and salt protection: complete sealing resists humidity, road salt spray and ice-melt chemicals;
• Shock and vibration damping: the soft Shore A 45 elastomer cushions components against transport and grid transients;
• Flame retardancy: UL 94 V-0 supports safety documentation for public charging installations;
• Scalable production: 1:1 mix ratio and 80°C/12-minute heat cure match high-volume charger assembly;
• Consistent quality: low shrinkage and bubble-free deep-section curing deliver repeatable encapsulation of large modules.

Results

• Field failure rate of power modules dropped after switching to HN-8806A/B encapsulation;
• Chargers passed thermal-shock testing between -40°C and +85°C without encapsulant cracking;
• Heat-accelerated curing increased production throughput to match network rollout schedules;
• Insulation resistance remained stable in salt-spray and humidity chamber tests;
• Flame-retardant documentation simplified approval for public charging site installations.

Packaging and Logistics

HN-8806A/B is packaged in 25 kg plastic barrels per component (50 kg/set) and classified as non-dangerous goods, simplifying cross-border shipment to North America. Keep containers sealed at 5-25°C; shelf life is 6 months from manufacture.

Conclusion

North America's EV charging buildout needs components that endure extreme cold, summer heat and continuous high-voltage duty. HN-8806A/B silicone potting compound delivers the insulation, thermal performance and mechanical protection that make chargers reliable for decades. Contact Shenzhen Hanast New Materials Co., Ltd. today for free samples and engineering support.