Awxlumv 100x45x5mm Thin Aluminum Heatsink Review (2026): A Spec-Based Look

What stands out

• Dimensions of 100 x 45 x 5mm allow for very low-profile installation.
• Constructed from black anodized aluminum for efficient passive heat transfer.
• Includes pre-coated thermal adhesive tape for easy mounting without hardware.
• Packaged as a set of two units for dual-component cooling needs.

Who it fits

Key specs explained for this heatsink

Material: Aluminum

Aluminum is a lightweight metal with good thermal conductivity. It absorbs heat from the component and spreads it across the fins. This allows the air to carry the heat away. You will find this material in most passive cooling solutions. It offers a balance of cost and performance for low-heat components. Compare this to copper, which conducts heat better but is heavier and more expensive.

Dimensions: 100 x 45 x 5mm

These measurements define the physical footprint and thickness of the unit. The 5mm height makes it very slim, fitting into tight enclosures where standard coolers cannot go. The 100mm length provides enough surface area for passive dissipation. You should measure your available space carefully before purchasing. This size is distinct from larger tower air coolers used for high-end CPUs.

Mounting Type: Pre-coated thermal tape

The heatsink uses adhesive tape instead of screws or clips. This simplifies installation significantly. You simply peel the backing and stick it to the component. This method is ideal for flat surfaces like LED strips or small chips. However, it offers less secure attachment than mechanical mounting. It is also harder to remove without damaging the component. Compare this to the robust clamping mechanisms found on major CPU air coolers.

Cooling Method: Passive

Passive cooling relies on natural air movement rather than a fan. There are no moving parts, so it operates silently and requires no power. This makes it suitable for environments where noise is a concern. It works best for components that generate low heat. High-power CPUs will overheat without active airflow. This approach contrasts with fan-equipped air coolers that force air through the fins.

Design and Build Overview

The listing describes these units as black anodized aluminum. Aluminum is chosen for its light weight and ability to spread heat. The anodized finish protects the metal surface. This helps the heatsink last longer in dusty environments. You get two identical pieces in the package. Each one measures 100 x 45 x 5mm. This slim profile allows installation in tight spaces. The low height means it will not interfere with nearby components or cases.

Mounting relies on pre-coated thermal adhesive tape. This removes the need for screws or clips. You simply peel the backing and stick the unit to the target surface. This makes installation quick and reversible if needed. The tape ensures direct contact between the metal and the heat source. This is critical for passive cooling performance. Without a fan, the surface area matters. The fin structure maximizes exposure to ambient air.

Weight is listed at 44 grams per unit. This is negligible for most electronics. The total package weighs 3.2 ounces. You can attach these to small components without adding bulk. The design suits passive cooling for LEDs, FPV transmitters, or 3D printer parts. The flat base ensures even heat transfer. The thin fins allow air to flow freely around them. This simple construction focuses on efficiency rather than complex features.

Setup And Daily Use Guide

Setting up this heatsink is straightforward because of its pre-coated thermal tape backing. You do not need screws, clips, or complex brackets. The listing confirms the adhesive is already applied to the base. This simplifies the installation process significantly. You simply peel off the protective layer from the tape. Then, you press the heatsink firmly onto the heat-generating component. Ensure the surface is clean and dry before application. This step is critical for proper thermal contact. The thin profile of 5mm allows it to fit in tight spaces where bulkier coolers cannot go. The dimensions of 100 x 45mm provide a decent surface area for passive cooling. You can attach it to various low-power devices. The features list mentions 3D printers, LEDs, FPV transmitters, and Peltier coolers. These are common applications for small, passive aluminum sinks. In everyday use, the heatsink relies on natural air convection. There are no fans to manage or wires to route. You get two units, so you can cool two separate components simultaneously. The black anodized finish may help with radiating heat, though the primary mechanism is conduction through the aluminum. Weight is minimal at 44g each. This makes it easy to handle during installation. Since it is passive, there is no noise generated during operation. You just need to ensure adequate airflow around the fins. The air must move across the surface area to carry heat away. If the component is enclosed, verify that the case has ventilation. The adhesive provides a permanent bond. You should plan the placement carefully before sticking it down. It is not designed for frequent removal. This setup is ideal for static installations where simplicity and silence are priorities.

Before You Buy This Heatsink

You need to verify your component’s heat output before buying. This unit is for passive cooling only. It works best for low-power devices like LEDs or FPV transmitters. It will not handle high-wattage CPUs. Check the surface area your target component has. The heatsink adds fins to increase contact with cool air. Ensure your component can fit the 100 x 45mm footprint. The pre-coated tape handles mounting, but surface flatness matters. If your component is uneven, the bond may weaken. You should clean the surface with alcohol before applying. Dust accumulation on the fins can reduce efficiency over time. Keep the area well-ventilated to help the aluminum dissipate heat. This thin profile suits tight spaces where larger coolers fail. It sits alongside bulkier air coolers as a niche option. Use it when space is limited and power draw is low. Do not expect it to replace active fans for heavy loads.

Check before you buy

• Verify component power draw is low enough for passive cooling
• Ensure component surface fits the 100 x 45mm base area
• Confirm the device has adequate airflow around the fins
• Check if the component surface is flat for good tape adhesion

The product at a glance

1

Awxlumv 100x45x5mm Thin Aluminum Heatsink

Best for: passive cooling of small electronics

Material

Aluminum

Cooling Method

Passive

Dimensions

100 x 45 x 5mm

Mounting Type

Pre-coated thermal tape

Color

Black

Weight

3.2 ounces

View on Amazon: Awxlumv 100x45x5mm Thin Aluminum Heatsink Affiliate link

This Awxlumv heatsink is a passive cooling solution made from black anodized aluminum. Each unit measures 100 x 45 x 5mm and weighs 44 grams. It features a pre-coated thermal conductive adhesive tape for direct mounting. The design maximizes surface area for contact with cool air. It suits passive cooling tasks for LEDs, FPV transmitters, or 3D printer components where space is tight.

Pros

• Thin 5mm height fits tight spaces
• Pre-coated thermal adhesive tape included
• Black anodized aluminum construction
• Lightweight at 44 grams each

Cons

• Passive cooling only, no fan support
• Small surface area limits heat dissipation
• Adhesive mounting lacks mechanical stability

Good fit if

• You need passive cooling for small electronics
• You have limited vertical space for mounting
• You are cooling LEDs or FPV gear

Skip if

• You require active fan cooling
• You need to mount heavy components
• You want high heat dissipation capacity

Verdict: Awxlumv 100x45mm Aluminum Heatsink fits users who need a thin, passive cooling plate for small components like LEDs or FPV transmitters. It is not suitable for high-heat active cooling applications.

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Frequently asked questions

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