Critical Mounting Instructions
To ensure long-term reliability and prevent thermal runaway, follow these mounting
practices for the Module-09E package:

● Heatsink Requirement: At currents above 25A, external heat dissipation is
mandatory. These modules are typically mounted to an aluminum heatsink or a
cold plate within the solar junction box.
● Surface Preparation: The mounting surface must be flat (within 4 mils/inch) and
free of burrs or scratches to minimize contact thermal resistance.
● Thermal Interface Material (TIM): Apply a thin, uniform layer (100–200 μm) of
silicone thermal grease or use a thermal pad to fill microscopic air gaps between
the module and the heatsink.
● Mounting Torque:
○ Recommended Range: 0.4 Nm to 0.6 Nm (approx. 4–6 kgf·cm).
○ Caution: Under-tightening increases thermal resistance, while
over-tightening can deform the plastic package, lifting the internal die
away from the base and causing “hot-spot” failures.

● Environmental Protection: Ensure the junction box is designed for easy heat
dissipation, as internal temperatures can exceed 70°C in sunny conditions,
potentially increasing leakage current and leading to junction meltdown