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EH004
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The EH004 is a compact extruded aluminum heatsink specifically designed for desktop laser applications requiring reliable, maintenance-free air cooling. Manufactured from AL6063 aluminum alloy using precision extrusion technology, this heatsink dissipates up to 20W of thermal load within a footprint of just 70 × 52 mm — making it ideal for space-constrained desktop laser systems where liquid cooling infrastructure is neither practical nor cost-effective.
With dimensions of 70 × 52 × 45.4 mm, the EH004 delivers passive thermal management through its optimized fin array architecture, converting heat from the laser source into convective airflow without fans, pumps, or external cooling circuits. The passivation surface treatment provides a clean, corrosion-resistant finish that maintains thermal performance integrity throughout the product lifecycle.
Whether integrated into laser marking workstations, engraving machines, compact medical laser devices, or DIY laser projects, the EH004 offers a proven, low-cost thermal solution backed by the same extrusion expertise that powers Greatminds' industrial-scale heatsink portfolio.
The EH004 is extruded from AL6063-T5 aluminum alloy, a material specifically chosen for heatsink manufacturing due to its excellent balance of thermal conductivity, mechanical strength, and extrudability. AL6063 offers a thermal conductivity of approximately 200 W/m·K and naturally forms a thin, thermally conductive oxide layer that supports efficient heat spreading from the laser mounting surface into the fin structure. The T5 temper condition provides sufficient rigidity for secure device mounting while maintaining the ductility required for precise extrusion profile geometry.
The EH004's fin array is engineered around a 20W thermal dissipation target — the actual heat load specified by the desktop laser application. Each fin is dimensioned and spaced to maximize the fin efficiency ratio (actual heat dissipated / ideal heat dissipated by an isothermal fin of the same geometry) within the constraints of natural convection airflow typical of desktop environments. The resulting design achieves the required thermal resistance without over-engineering, keeping material usage and cost optimized for the target power level. This "right-sized" approach is particularly valuable in cost-sensitive desktop equipment where every gram of aluminum and every millimeter of height matters.
The mounting base of the EH004 is precision-machined by CNC to achieve flatness and surface roughness specifications compatible with efficient thermal interface material (TIM) application. After machining, the entire heatsink undergoes passivation treatment — a chemical process that enhances the natural oxide layer on the aluminum surface, improving corrosion resistance without adding insulating coating thickness. Unlike anodizing, which can introduce a thermally resistive barrier layer (typically 10–50 μm of Al₂O₃ with thermal conductivity ~30 W/m·K), passivation preserves the bare aluminum thermal pathway while providing adequate environmental protection for indoor desktop use. The resulting surface is clean, non-reactive, and ready for direct TIM application.
At 70 × 52 × 45.4 mm, the EH004 occupies minimal volume within desktop laser enclosures. The 70 mm × 52 mm base plate provides sufficient mounting area for standard laser diode packages and driver modules, while the 45.4 mm fin height delivers the necessary convective surface area without exceeding typical desktop equipment height constraints. The compact form factor enables integration into OEM laser marking systems, laboratory benchtop setups, and portable laser devices where every cubic centimeter of internal space is at a premium. The lightweight AL6063 construction (estimated mass under 80 grams) further supports applications where equipment portability is a design requirement.
Unlike liquid cooling systems that require coolant reservoirs, pumps, tubing, and periodic maintenance, the EH004 operates entirely on passive air convection — no moving parts, no fluid circuits, no scheduled servicing. This makes it inherently reliable for continuous-duty desktop laser operations where uptime is critical and maintenance access is inconvenient. The natural convection cooling approach eliminates the noise and vibration associated with fan-cooled solutions, making the EH004 particularly suitable for precision laser applications where mechanical disturbances could affect beam quality or engraving accuracy. For 20W-class desktop lasers, air cooling represents the optimal balance of thermal performance, cost, and operational simplicity.
| Parameter | Details |
|---|---|
| Model | EH004 |
| Type | Extruded Aluminum Heatsink |
| Material | AL6063-T5 Aluminum Alloy |
| Dimensions (L × W × H) | 70 × 52 × 45.4 mm |
| Thermal Dissipation Capacity | 20 W |
| Surface Treatment | Passivation |
| Base Plate Area | 70 × 52 mm (~3,640 mm²) |
| Application | Desktop Laser Cooling |
| Cooling Method | Passive Air Convection (Natural Convection) |
| Key Advantage | Compact, maintenance-free, cost-effective 20W air cooling |
The EH004 is explicitly engineered around a 20W thermal dissipation requirement — the heat output of the target desktop laser system. This specification is not extrapolated or estimated; it is the design anchor provided by the application scenario.
In passive air-cooled heatsink design, thermal performance is governed by the fundamental heat transfer equation:
Q = (T_junction − T_ambient) / R_th_total
Where Q = 20W (thermal load), T_junction is the laser junction temperature limit, T_ambient is the surrounding air temperature, and R_th_total is the total thermal resistance from junction to ambient.
The EH004's extruded fin array is designed to provide sufficient thermal conductance (1/R_th) such that, under typical desktop operating conditions (ambient temperature 25–40°C, natural convection airflow 0.5–2.0 m/s from equipment ventilation), the laser junction temperature remains within its safe operating range. The 45.4 mm fin height provides adequate surface area for convective heat transfer, while the AL6063 base plate ensures rapid heat spreading from the concentrated laser source to the distributed fin tips.
| Condition | Value |
|---|---|
| Laser Thermal Output | 20 W |
| Ambient Temperature Range | 25–40°C |
| Cooling Method | Natural Convection |
| Airflow | Passive (no forced fan) |
| Expected Junction Temperature Rise | Dependent on laser package and TIM; heatsink supports ΔT suitable for typical diode lasers |
| Application | Description |
|---|---|
| Desktop Laser Marking Systems | Compact fiber or diode laser marking workstations requiring quiet, maintenance-free cooling for 10–20W laser sources |
| Laser Engraving Machines | Benchtop engraving equipment where vibration-free operation is essential for pattern precision |
| Compact Medical Laser Devices | Dermatology, dental, or ophthalmic laser instruments where equipment size and noise levels are critical |
| Laboratory Laser Sources | Research-grade diode lasers and solid-state lasers used in optical experiments and spectroscopy setups |
| 3D Printer Laser Modules | High-resolution resin 3D printers incorporating UV or near-IR laser sources for curing |
| DIY and Hobbyist Laser Projects | Maker-grade laser engravers, cutters, and custom laser builds where cost-effective thermal management is needed |
Desktop laser systems operate in a fundamentally different thermal environment than their industrial counterparts. Unlike factory-floor laser cutters with dedicated chiller units and climate-controlled environments, desktop lasers face a unique set of constraints:
A 20W desktop laser diode concentrates its entire thermal output into a package typically measuring less than 10 × 10 mm. This creates an extreme heat flux (heat per unit area) at the source that, without an effective heatsink, would drive the junction temperature well beyond safe operating limits within seconds. The EH004's 70 × 52 mm base plate provides over 50× the mounting area of a typical laser diode package, spreading the concentrated heat load across a much larger surface for efficient dissipation.
Desktop workstations, laboratory benches, and portable equipment simply do not accommodate the pumps, reservoirs, tubing, and coolant management that liquid cold plates require. Air-cooled extruded heatsinks like the EH004 provide a "drop-in" thermal solution that requires no plumbing, no coolant monitoring, and no risk of leakage that could damage sensitive optical or electronic components in a desktop environment.
Many desktop laser applications — engraving, marking, and precision cutting — demand mechanical stability. Fan-cooled solutions introduce vibration and acoustic noise that can degrade beam quality or disturb delicate workpieces. The EH004's passive convection design operates in complete silence with zero vibration, preserving the precision that desktop laser users expect.
Desktop laser equipment competes in a price-sensitive market where every component cost matters. Extruded aluminum heatsinks represent one of the most cost-efficient thermal management technologies available — the extrusion process enables high-volume production with minimal material waste, and AL6063 is an affordable, widely available alloy. The EH004 delivers professional-grade thermal performance at a price point compatible with desktop equipment economics.
| Value Dimension | Description |
|---|---|
| Proven Extrusion Technology | Leverages the same AL6063 extrusion expertise behind Greatminds' industrial heatsink portfolio (EH001, etc.) |
| Application-Sized for 20W | Thermal capacity precisely matched to desktop laser heat loads — no over-engineering, no under-performance |
| Passivation Surface Ready | Clean, corrosion-resistant finish prepared for direct TIM application without additional surface preparation |
| Zero Maintenance | Passive air convection eliminates pumps, fans, coolant, and scheduled servicing |
| Compact Desktop Form Factor | 70 × 52 × 45.4 mm footprint integrates into space-constrained equipment without design compromises |
| Cost-Optimized Manufacturing | Extrusion process delivers high-volume production efficiency for cost-sensitive desktop equipment markets |
Greatminds offers comprehensive OEM services for the EH004 platform:
Custom Extrusion Profiles: Modified fin geometry, base plate dimensions, or mounting hole patterns to match specific laser diode packages
Surface Treatment Options: Anodizing (natural or colored), hard anodizing, nickel plating, or chromate conversion in addition to standard passivation
Thermal Interface Optimization: Pre-applied thermal pads, phase-change materials, or graphite sheets for simplified OEM assembly
Private Label Manufacturing: Neutral packaging, custom branding, and specification sheets for distributor and integrator channels
Volume Pricing: Tiered pricing structure for orders from 500 to 50,000+ units annually
Application Engineering Support: Thermal simulation, prototype validation, and design-for-manufacturing consultation
Q：Do you have your own brand? A：Yes. Our brand name is GREATMINDS. |
Q：Are you a manufacture or trading company？ A：We design and produce thermal products by ourselves. |
Q：Where is your plant? A：We have two plants. One is at Suzhou in eastern China, and the other is at Dongguan in southern China. |
Q：What thermal products do you supply? A：We have heatsink, fan, heapipe, vapor chamber, liquid cooling solution, and so on. |
Q：Which types of heatsinks do you supply? A：Our products cover many processes, extrusion, die casting, skived fin, zipper fin, soldering,friction stir welding, vaccum brazing, and so on. |
Q：What is the leadtime for prototype? A：It depends on different type of products. Usually it takes 2-3 weeks. |
Q：Do you have a NPI process in your company? A：Yes. Tooling samples and trial run will be strictly implemented before mass production. |
Q：What capabilities do you have in your plant? A：We have stamping, machining, and soldering production in house. |
