Renewable Energy
Thermal Materials for Solar & Wind Power Electronics
Optimize reliability in PV inverters, wind converters, and outdoor power electronics with insulating thermal pads, thermal potting, bonding adhesives, and sealing silicone foams.
High Voltage Isolation
Electrical insulation + heat transfer for IGBT/SiC power stages.
Outdoor Robustness
Sealing, humidity resistance, and stable compression over long service life.
DFM Friendly
Die-cut pads, adhesive options, controlled potting & cure profiles.
Typical Equipment
- PV string inverter / central inverter power stage
- Wind turbine converter cabinets & control electronics
- Outdoor power supplies, DC-DC modules, transformer assemblies
- Monitoring/control boards in sealed outdoor enclosures
Thermal Challenges in Renewable Energy Systems
Renewable energy equipment is often deployed outdoors with long service life expectations. The thermal interface must remain stable across environmental cycling, while meeting insulation and safety requirements for high-voltage power electronics.
High Power Density
IGBT/SiC stages, magnetics, and busbars generate localized hotspots.
Electrical Isolation
Insulating TIMs help manage heat while maintaining dielectric performance.
Outdoor Environment
Humidity, dust, temperature swing, and sealed enclosures raise thermal stress.
Long-Life Stability
Compression set control & aging stability reduce thermal resistance drift over years.
Reliability Validation (Typical)
Sheen highlights 1000-hour thermal shock, 1000-hour 85°C/85%RH, and 1000-hour high-temperature aging tests for reliability positioning in long-life applications.
Material Portfolio (Parameter-Driven)
The following families cover the majority of renewable energy power electronics interfaces. Use them as a practical starting point, then validate against your dielectric requirement, gap/pressure window, and environmental profile.
Silicone Thermal Pads — SF Series
Insulating gap fillers for PCB-to-chassis and module-to-heatsink interfaces.
- 1.5 → 15 W/m·K
- 0.3–10.0 mm (some grades 0.5–5.0 mm)
- >6 or >8 kV/mm (by grade)
- UL94 V-0
- down to -50°C; up to 200°C (by grade)
For power modules, prioritize thickness stability and insulation first, then optimize k-value and hardness for your clamping pressure window.
Thermal Potting — US-5201 Series
For sealed power assemblies: insulation + mechanical reinforcement + heat spreading.
- 0.8–3.5 W/m·K (by grade)
- >2.0 to >5.0 kV/mm (by grade)
- for self-leveling and controlled dispensing
- 25°C ~5h; 80°C ~20min; 100°C ~10min
inverter power modules, high-frequency transformers, and PCB-to-housing fixation where you need insulation + heat transfer.
Silicone Foam — SA700 Series
Gasketing, sealing, buffering, and damping for outdoor enclosures and assemblies.
- 200–400 kg/m³
- 0.6–20.0 mm (by grade)
- <5% @ 100°C
- UL94 V-0 / HF-1
- -55~220°C
Treat foam as “sealing + mechanical management”; pair it with a TIM (pad/gel/adhesive/potting) that carries the heat path.
Silicone-Free Pads — AF Series
For assemblies sensitive to silicone migration/volatiles, where contamination risk must be minimized.
- 1.0–6.0 W/m·K
- 0.5–5.0 mm (some grades 0.5–2.0 mm)
- -40~125°C class (by grade)
optical/monitoring components in sealed boxes, sensor-adjacent assemblies, or programs with strict contamination controls.
Reference Integration Examples (Generalized)
The examples below describe common renewable energy thermal architectures without customer-identifying details. They help engineers map interface types to material families and RFQ fields.
PV String Inverter Power Stage
Use insulating thermal pads between power devices/modules and the heatsink/cold plate to bridge flatness tolerance and maintain dielectric safety.
gap (min/typ/max), clamping pressure, dielectric target, flame rating, and long-term compression stability.
Wind Converter Cabinet (Control + Power)
Combine TIM for heat paths (pad/gel/adhesive) with silicone foam gasketing to improve sealing, dust resistance, and vibration damping in large cabinets.
sealing target, foam compression set, temperature swing, cabinet airflow constraints, service access.
Magnetics & Transformer Potting
Thermal potting can reinforce solder joints/components and provide heat transfer plus electrical insulation—especially in inverter/transformer assemblies.
viscosity for filling, cure profile, target conductivity, dielectric strength, and rework strategy (partial vs full potting).
Material Selection Checklist (Copy/Paste for RFQ)
Send the following fields to Sheen for a material stack-up recommendation (pad/potting/foam/adhesive), thickness guidance, and prototype plan aligned to your production process.
| Field | What to Provide | Why It Matters |
|---|---|---|
| System type | PV string/central inverter, wind converter cabinet, outdoor PSU, transformer assembly | Defines environment + interface priorities |
| Power devices | IGBT / SiC MOSFET, module package, baseplate type, hotspot map | Determines dielectric & heat flux window |
| Power dissipation | W per module/device + hotspot size (mm²) | Sets target thermal resistance |
| Interface type | Module→heatsink, PCB→chassis, magnetics→housing, enclosure sealing | Chooses material family (pad vs potting vs foam) |
| Gap window | min/typ/max (mm) + flatness/tolerance stack-up | Primary input for thickness & compliance |
| Clamping pressure | Estimated pressure/torque limit/spring clamp details | Filters hardness and long-term stability |
| Electrical insulation target | Dielectric strength requirement (kV/mm), isolation constraints, leakage concerns | Critical for HV safety design |
| Flame rating requirement | UL94 V-0 / HF-1 requirement (if applicable) | Safety compliance & risk control |
| Environment | Outdoor temp range, humidity, dust, salt fog, sealing target, altitude | Guides potting/foam choice & aging plan |
| Serviceability / rework | Rework needed? yes/no; partial potting allowed? | Prevents costly maintenance surprises |
| Manufacturing constraints | Die-cut shape, adhesive side, dispense method, cure time constraints | Ensures DFM and production yield |
| Volume & schedule | Prototype qty + annual volume + target SOP | Optimizes sampling, tooling, and cost structure |
FAQ (Renewable Energy Thermal Materials)
Common questions from power electronics engineers and sourcing teams during design-in, prototype builds, and qualification.
Use thermal pads when you need controlled thickness, straightforward assembly, and easier rework. Use thermal potting when you also need mechanical reinforcement and long-term protection in sealed modules (e.g., magnetics, transformer assemblies, fixed PCB-to-housing interfaces). Consider serviceability early—partial potting is a common compromise.
Provide interface type, gap (min/typ/max), clamping pressure, power dissipation/hotspot size, dielectric target, flame rating, and environmental profile (outdoor temp/humidity/sealing). A stack-up drawing typically shortens the iteration cycle.
Start from your isolation architecture and safety margin philosophy, then translate that into a dielectric strength target for the interface layer (kV/mm). Confirm with your creepage/clearance design and validation plan. If your design has partial discharge or insulation coordination requirements, share them early so the material selection matches program constraints.
Use silicone foam primarily for sealing, buffering, and vibration damping—especially in outdoor enclosures and cabinet systems. It supports sealing targets and reduces mechanical stress; pair it with a TIM (pad/gel/adhesive/potting) that carries the heat path for power devices or boards.
Control the gap/pressure window, avoid over-compression that accelerates drift, and select materials with stable aging performance. Then validate using environmental cycling aligned to your field conditions (temperature swing + humidity) and lock the assembly torque/pressure specification to keep production variation under control.
Yes. Share your outline drawing (or contact area dimensions), target thickness/gap window, and process constraints. Sheen can recommend die-cut formats, adhesive configurations, and potting cure profiles aligned to your takt time and yield objectives.
Get a Renewable Energy Material Stack-Up Recommendation
Send your gap window, pressure, dielectric target, and outdoor environmental constraints. We will recommend candidate materials and a prototype plan aligned to inverter/converter manufacturing realities.
Include these inputs
- Interface type + gap (min/typ/max) + clamping pressure
- Power dissipation + hotspot map
- Dielectric strength target + flame rating
- Outdoor environment (temp/humidity/dust/salt fog) + sealing target
- Rework policy (partial potting allowed?)
- Prototype qty + schedule