Potting Compound Application Scenarios & Selection Approach for 2026
For the past two years, it has become practically impossible to select potting compounds with a one-size-fits-all approach. Requirements for thermal conductivity, viscosity, flame retardancy, and process window now diverge sharply across applications, and demand is shifting from broad to granular. This article outlines the key performance indicators and selection logic across five major application segments.
Automotive electronics is the fastest-growing segment by volume. To protect precise ECU/BMS operation and ensure stable sensor signal transmission, ECUs, sensors, and BMS must withstand sustained thermal cycling from -40°C to over 150°C. For 800V platforms, dielectric strength of at least 15 kV/mm has become a hard requirement, and the adoption of SiC modules is pushing thermal conductivity demands from 1.0 W/m·K toward 2.0–4.0 W/m·K. As a result, the need for high thermal conductivity and high dielectric strength is growing day by day.
Industrial and power electronics impose the most comprehensive requirements on materials. PV inverters and energy storage converters typically require thermal conductivity above 2.0 W/m·K, along with dielectric strength of at least 18 kV/mm. IGBT modules must operate long-term at temperatures above 120°C, placing strict demands on partial discharge and thermal aging, with reliability validation cycles far longer than consumer-grade products.
In the 5G base station segment, potting for AAU/BBU must balance thermal performance (1.5–3.0 W/m·K) with lightweighting, where low specific gravity formulations effectively reduce equipment weight. Meanwhile, new energy storage is scaling rapidly—battery modules and high-voltage control boxes have rigid requirements for flame retardancy and thermal management while remaining price-sensitive. Consumer electronics and home appliance scenarios prioritize curing speed and production line compatibility, with thermal needs concentrated in the 0.5–1.5 W/m·K range and a stronger focus on production throughput.
Selection should be evaluated in the following priority order: operating temperature range and long-term thermal stability, thermal conductivity matching, flame retardancy rating, dielectric strength and volume resistivity, viscosity and process window, and supplementary requirements such as low specific gravity and weather resistance. Offering multiple thermal grades within a single product series helps maintain process consistency while adapting to diverse production needs.
