Best coating for high voltage PCB

For high-voltage applications, the key requirement is high dielectric strength (insulation capability), along with resistance to moisture, contamination, and electrical arcing. The best Konform beläggning is not just one type—it depends on performance level—but generally:

👉 Silicone and parylene coatings are considered the best for high-voltage PCBs

Best overall: Silicone conformal coating

Silikon Konform beläggning is widely regarded as the best balance for high-voltage Montering av kretskort och SMT-montering.

Why silicone is ideal:

• Hög dielektrisk hållfasthet (up to ~500 V/mil)
• Excellent performance under high temperature and humidity
• Flexible → reduces cracking under electrical stress
• Strong resistance to corona discharge and arcing

Silicone coatings are commonly used in power electronics, automotive systems, and industrial high-voltage designs where reliability is critical.

Best for extreme performance: Parylene coating

If you need the highest insulation performance, parylen is often the top choice in advanced Nyckelfärdig PCB-montering.

Advantages:

• Extremely uniform, pinhole-free coating (vapor deposition)
• Very high dielectric strength and insulation reliability
• Excellent protection against moisture and contamination
• Ideal for compact, high-voltage, high-density designs

Limitation: High cost and complex processing

Other viable options

• Polyuretanbeläggning
  • Good dielectric strength (~350 V/mil)
  • Strong chemical resistance
  • Suitable for industrial environments
• Epoxy coating
  • High insulation and durability
  • Better for harsh environments but less flexible
• Acrylic coating
  • Lower cost, moderate dielectric strength (~300–400 V/mil)
  • Not ideal for high-voltage or harsh conditions

Why coating matters for high voltage

In high-voltage Montering av kretskort, risks include:

• Electrical arcing
• Leakage currents
• Electrochemical migration
• Reduced creepage distance

Konform beläggning helps by:

• Increasing surface dielectric strength
• Preventing moisture-induced leakage
• Suppressing arcing and corona discharge
• Improving long-term insulation stability

Slutsats

• Best overall for high voltage: Konform beläggning av silikon
• Best for extreme/high-end applications: Parylene coating
• Budget alternative: Polyuretan

I Montering av kretskort, SMT-montering, och Nyckelfärdig PCB-montering, the right coating choice should be based on voltage level, environment, and reliability requirements—not just cost.

Få en offert på Conformal Coating

Har du ett PCB-projekt som kräver konform beläggning? Få en skräddarsydd offert idag.
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Rekommenderat material

• Akryl (AR)
• Silikon (SR)
• Polyuretan (UR)
• UV-härdbar - UV
• Jag är inte säker / Behöver råd

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Meddelande

"Ange komponenter eller områden som INTE får beläggas (t.ex. kontakter, testpunkter)." Om du har specifika krav på beläggningsmaterial (t.ex. HumiSeal), vänligen ange det i meddelanderutan nedan.

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