TO-247 25mm Aluminum Cooling Fin Heatsink

Description

Technical Overview of the TO-247 25mm Cooling Fin Heatsink

The TO-247 25mm Cooling Fin Heatsink is a specialized thermal management solution engineered for high-power semiconductors. The TO-247 package is typically used for heavy-duty components like high-current MOSFETs, IGBTs, and large Schottky diodes that generate substantial heat. This 25mm height heatsink provides the necessary surface area to dissipate that heat efficiently, preventing thermal runaway. At BuyCircuitParts, we offer this TO-247 25mm Cooling Fin Heatsink to ensure that your high-wattage power stages remain cool, reliable, and “on track.“

Key Specifications and Physical Dimensions

To ensure compatibility with your power electronics layout, here are the technical specifications for the TO-247 25mm Cooling Fin Heatsink:

• Material: Industrial Grade Aluminum Alloy.

• Compatibility: Optimized for TO-247, TO-218, and TO-3P packages.

• Height: 25mm (Provides a balance between cooling and space efficiency).

• Fin Configuration: Vertical cooling fins for enhanced natural convection.

• Mounting: Pre-drilled center hole for easy screw-on assembly.

• Finish: Black Anodized / Natural Aluminum for high emissivity.

• Thermal Performance: Designed for high-wattage dissipation in power-dense environments.

Why 25mm Cooling Fins Matter for TO-247 Packages

Components in a TO-247 housing are usually heart of power-intensive circuits. The TO-247 25mm Cooling Fin Heatsink is taller than standard small-signal heatsinks, which allows it to catch more airflow. The 25mm vertical fin architecture is specifically designed to exploit the “chimney effect,” where hot air rises between the fins, drawing cooler air from the bottom. This passive cooling mechanism is vital for maintaining the junction temperature of your power transistors within safe limits. At BuyCircuitParts, we ensure the base of every heatsink is precision-milled to maximize the contact area with your component.

Common Applications for the TO-247 Heatsink

The TO-247 25mm Cooling Fin Heatsink is a staple in high-power electronic assembly:

1. Solar Inverters: Cooling the large MOSFETs used in DC-to-AC conversion.

2. Welding Machines: Managing heat in the high-current IGBTs of inverter welders.

3. Variable Frequency Drives (VFDs): Dissipating thermal energy from motor control power stages.

4. High-Power Audio Amps: Used on output transistors to ensure stable performance under heavy loads.

5. Switching Power Supplies (SMPS): Cooling the primary switchers in 500W+ power units.

Optimizing Performance with Proper Installation

For the TO-247 25mm Cooling Fin Heatsink to work effectively, installation details are critical:

• Thermal Interface Material: Since TO-247 packages handle high power, using a high-conductivity paste (like our Heat Sink Thermal Paste 50g) is mandatory to eliminate air gaps.

• Mounting Pressure: Use a high-quality screw and nut to apply even pressure across the component’s metal tab. This ensures the lowest possible thermal resistance between the silicon and the aluminum.

• Orientation: Install the TO-247 25mm Cooling Fin Heatsink with the fins running vertically to allow heat to rise naturally if no fan is present.

• Electrical Isolation: If the heatsink needs to be isolated from the live tab, ensure you use high-quality silicone pads designed for TO-247 dimensions.

Why Source from BuyCircuitParts?

As a professional seller, BuyCircuitParts understands that a “cheap” heatsink with uneven fins or a warped base can lead to component failure. We stock TO-247 25mm Cooling Fin Heatsink units that are manufactured with high-purity aluminum and feature a clean, burr-free finish. This ensures that your assembly process is smooth and your final product is professional. Our commitment to fast shipping means you won’t have to wait for weeks to get your thermal management “on track.“

Durability and Thermal Longevity

The robust construction of our TO-247 25mm Cooling Fin Heatsink makes it resistant to mechanical deformation and vibration. This is particularly important in industrial machinery or automotive applications where the heatsink must maintain constant contact pressure over years of use. By choosing our premium aluminum fins, you are investing in the long-term health of your power semiconductors and reducing the risk of costly downtime due to overheating.

Approx Dimensions:
Body Height: ~25 mm
Body Width: ~33 mm
Body Depth (Fin Depth): ~16 mm
Mount Hole Diameter: ~3 mm (standard M3 screw fitting)
Blade Thickness: ~1 mm
Weight: ~18–20 grams

🧊 Note:
Product colour and markings may vary slightly based on manufacturer and batch. Functionality is guaranteed. (Refer to the product image for illustration only. For precise specifications, consult the datasheet.) For more information on thermal management theory, visit the Heat Sink Engineering Guide..

Explore more high-quality components like this at BuyCircuitParts, your one-stop shop for all electronic needs.