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Passive Heat Sink

Silent & Reliable Passive Heat Sinks for Natural Convection Cooling
 
✓ 150–400 W/mK Thermal Conductivity (Material-Dependent)
✓ Aluminum, Copper, or Hybrid Designs
✓ Optimized Fin Geometry for Natural Airflow
✓ ISO 9001 & RoHS Certified
✓ Prototype to High-Volume Production
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Finned Heat Sink 4

Why

Fecision?

custom heat sink

Precision At Fecision

Custom CNC Machining & Molded Solutions

As a leading CNC machining and mold manufacturing service provider, we deliver tailored heat sink solutions using advanced materials and manufacturing techniques, including CNC milling, extrusion, die-casting, and bonded fin technology.

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Optimized Thermal Performance

CFD-simulated designs for maximum heat dissipation

Durability

Corrosion-resistant finishes for harsh environments

Custom Designs

Collaborate with our engineers for application-specific solutions

Cost Efficiency

Competitive pricing for both low/high-volume orders

Global Compliance

Meet RoHS, REACH, and ISO 9001 standards

Passive Heat Sinks

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Passive heat sinks are fanless thermal management devices that rely on natural convection and radiation to dissipate heat, making them ideal for applications requiring silent operation, low maintenance, and long-term reliability. By optimizing fin geometry and material conductivity, they eliminate moving parts while delivering consistent cooling for medium-heat-flux systems.
 
Our technology increases heat dissipation efficiency by 30-40% over standard passive designs, validated through CFD simulations and real-world thermal testing.

Key Characteristics

✔️Design Principle: Vertical fins/chimneys to maximize buoyancy-driven airflow.
✔️Material Flexibility: Aluminum (cost-effective) or copper (high conductivity).
✔️Advantages: Silent operation, zero power consumption, and extended lifespan.

Technical Specification Table

Passive Heat Sinks Technical Details
ParameterSpecifications
Material
Aluminum 6063-T5, Copper C110, Hybrid Composites
Thermal Conductivity
150–400 W/mK (material-dependent)
Max Dimensions
300mm (L) x 250mm (W) x 150mm (H)
Fin Height
10–100mm
Surface Finish
Anodized (black/clear), epoxy-coated
Thermal Resistance
1.0–5.0°C/W (natural convection)
Certifications
ISO 9001, RoHS, UL, CE

Types of Passive Heat Sinks

Vertical Fin Heat Sinks

 
Tall, widely spaced fins to enhance chimney-effect airflow in enclosures.
 
 
Applications: Smart home hubs, set-top boxes.
 

Pin Fin Arrays for Natural Convection

Dense pin arrays to maximize surface area in compact spaces.
 
 
Applications: LED drivers, IoT sensors

Hybrid Radiative-Convective Designs

Black anodized fins to boost radiative heat transfer in low-airflow environments.
 
Applications: Outdoor telecom cabinets, solar charge controllers

Curved Base Heat Sinks

Conformal bases for cylindrical components (e.g., power resistors, transformers).
 
 
Applications: Industrial power supplies, EV onboard chargers

Applications & Industries

Folded Fin Heat Sinks in Extreme Environments

Consumer Electronics

Cool smart TVs, routers, and gaming consoles without disruptive fan noise.

LED Lighting

Extend lifespan of 100W+ LED streetlights with black anodized passive cooling.

Industrial Controls

Maintenance-free cooling for PLCs and motor drives in dusty environments.

Automotive Electronics

Silent cooling for infotainment systems and ADAS modules in EVs.

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Ready to Eliminate Fan Noise?
Submit your thermal specs for a free passive heat sink design proposal within 24 hours!

Workflow

Customization Process

1
Consultation

Share your thermal requirements, size constraints, and environmental conditions.

2
Design & Simulation

We provide 3D CAD models and thermal analysis reports.

3
Prototyping

Test functional prototypes for performance validation.

4
Production

Seamless transition to full-scale manufacturing.

Built for Reliability & Safety

Certifications & Quality Assurance

Every passive heat sink undergoes thermal imaging and long-term durability testing.

ISO 9001:2015 & AS9100

RoHS/REACH Compliance

UL 94V-0 Flame-Retardant Materials

MIL-STD-810G (Vibration/Shock Testing)

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Let us bring your vision to life.
 
Share your project details, and we’ll craft a tailored proposal just for you.
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