Black Anodized Aluminum Profile Heat Sink for LEDs

Product Overview

To address the thermal management challenges of high-power LEDs, our heat sinks utilize aluminum with a high thermal conductivity coefficient (205 W/(m·K)) combined with a black anodized finish. This process employs electrolytic oxidation to form a hard, porous aluminum oxide layer (Al₂O₃), increasing the heat dissipation surface area by 30% while significantly enhancing thermal transfer efficiency to the surrounding air. Specifically engineered for high-power LEDs (50W-300W) in residential, commercial, and industrial applications, this product ensures stable light source performance and substantially extends LED lifespan.

Core Features

Superior Thermal Performance: The black anodized layer (10-20μm thick) improves thermal conductivity by 15% compared to untreated aluminum, reducing the junction temperature of a 100W LED by 15-20°C (e.g., from 85°C to 65-70°C). This not only controls lumen depreciation below 10% after 20,000 hours (meeting LM-80 standards) but also extends LED lifespan beyond 50,000 hours. Thermal resistance can reach as low as 0.5°C/W (300W model), ensuring efficient heat dissipation even under high loads.

Durable Surface: Anodized to MIL-A-8625 Class 2 corrosion resistance, passing 500 hours of salt spray testing (ASTM B117) without red rust. The oxide layer hardness is three times that of bare aluminum (600 HV vs. 200 HV), effectively resisting scratches and abrasion. This makes it particularly suitable for industrial lighting or outdoor environments where exposure to debris and impact is common.

Lightweight construction: Precision-extruded 6063-T5 aluminum alloy profiles deliver superior thermal performance while weighing 60% less than copper heat sinks with equivalent thermal conductivity. For example, a 300W aluminum heat sink weighs only about 1.5kg, while a copper equivalent weighs 2.5kg. This makes it highly suitable for weight-sensitive applications like ceiling-mounted or suspended fixtures (e.g., track lights, industrial/mine lights).

Flexible Customization: We offer various shapes, including extruded fins (maximizing surface area), channel-type (for linear LEDs), and plate-type (for COB LEDs). CNC machining services (drilling, tapping, cutting) are available for precise LED module integration, including mounting holes, wire management channels, or thermal paste application grooves. Length (100mm to 2000mm) and fin density (5-15 fins per inch) are fully customizable.

Modern Aesthetic Design: The matte black anodized surface complements contemporary LED fixture designs, easily integrating into dark-toned lighting (e.g., black track lights, industrial-style pendants) while concealing dust or minor imperfections. Unlike painted surfaces, the anodized layer resists peeling or fading, maintaining its refined appearance year after year.

Product Applications

Commercial Lighting: High-bay fixtures in warehouses, retail stores (e.g., supermarkets, clothing shops), and office panel lights. For example, a 200W high-bay LED with this heat sink maintains a junction temperature of 68°C, ensuring bright, consistent lighting for 12-hour daily use in a warehouse. Retail display lights (e.g., jewelry cases) benefit from the compact design, which fits into tight spaces.

Outdoor Lighting: Streetlights, floodlights, and landscape lighting exposed to harsh weather. The corrosion-resistant anodized finish withstands rain, snow, and UV radiation, while the heat dissipation prevents LED failure in hot summer months (e.g., 40°C outdoor temperatures). Solar-powered streetlights also benefit from the lightweight design, reducing the load on solar panel poles.

Residential Lighting: Recessed ceiling lights (downlights), under-cabinet fixtures, and smart lighting systems. The low-profile design of channel-shaped heat sinks fits into 4-inch recessed cans, while the black finish matches modern kitchen or living room decor. Under-cabinet lights use plate-shaped heat sinks to stay cool, even when mounted near cabinets or countertops.

Industrial Lighting: Lighting for factories, workshops, and refrigerated spaces (e.g., cold storage warehouses). In cold environments, the heat sink prevents condensation (thanks to the anodized layer’s non-porous surface), while in high-temperature factories (e.g., metalworking shops), it maintains LED performance at 50°C - 60°C ambient temperatures.