How to Choose Inductor Potting Compound?Elaplus EP 1712 Two-Component Epoxy Potting Compound Solution
Inductors in power modules, automotive electronics, industrial control equipment, transformers, reactors, and inductor coils operate long-term under heat, vibration, moisture, voltage stress, and space-constrained conditions. For inductor products, potting compound is more than just a filler—it provides insulation, thermal conduction, moisture & shock resistance, flame retardancy, and structural fixation. Improper selection of inductor potting compound may lead to: ■ Adhesive cracking ■ Coil loosening ■ Reduced insulation ■ Excessive local temperature rise ■ Moisture intrusion ■ Debonding after vibration ■ Insufficient flame retardancy ■ Degraded long-term reliability For potting inductors, reactors, electronic coils, and high-reliability electronic modules, Elaplus EP 1712 two-component epoxy potting compound is recommended. EP 1712 features high hardness, good toughness, low volume shrinkage, UL94 V-0 flame retardancy, excellent electrical insulation, and strong moisture & shock resistance, ideal for inductor potting requiring high structural strength, insulation reliability, and long-term protection. 1. Why Do Inductors Need Potting Compound? Inductors consist of magnetic cores, copper windings, bobbins, pins, and housings. During operation, they are affected by current changes, magnetic fields, and environmental variations. Key functions of inductor potting compound: ① Insulation Protection Stable electrical insulation is required between coils, pins, solder joints, and magnetic cores. EP 1712 offers excellent electrical insulation after curing: Dielectric strength: 20 kV/mm (25°C) Volume resistivity: 2.00×10¹⁴ Ω·cm It reduces risks of leakage, breakdown, and short circuits. ② Thermal Conduction & Heat Dissipation Inductors generate heat during operation, especially in high-frequency power supplies, reactors, and power modules. Potting compound fills internal gaps to conduct heat from windings and cores to the housing or surrounding structures, reducing hotspots. ③ Moisture & Shock Resistance Long-term moisture exposure causes insulation degradation, terminal corrosion, and coil failure. EP 1712 forms a stable protective layer, blocking moisture, dust, and contaminants. It secures coils and lowers loosening risk from vibration. ④ Flame Retardant Protection Flame retardancy is critical in power,…
