Material selection
Use a soft low-modulus pad for uneven gaps; select reinforced grades when handling strength or puncture resistance is important.
DRAWING-BASED CUSTOM PARTS
Die-Cut Silicone Thermal Gap Pads
Soft, conformable silicone gap pads that transfer heat away from components while electrically isolating the assembly.
Custom thermal interface pads die cut for electronics that need controlled heat flow, gap filling and dielectric isolation.
Engineered Die-Cut Silicone Thermal Gap Pads
Silicone thermal pads are placed between heat-generating components and a heat sink, chassis or spreader plate. Their softness conforms to assembly tolerances, reducing interfacial air gaps while the filled silicone matrix provides a managed thermal path.
Material approach
Silicone gap pads combine conformability, dielectric strength and stable thermal performance without pump-out common to grease-based interfaces.
Key features
- Dielectric isolation
- gap conformability
- controlled thickness
- clean die-cut placement
- low oil bleed options.
Custom Specifications
Typical values for reference only. Final material grade, tolerance and dimensional capability are confirmed after drawing review.
| Material | Thermally conductive silicone elastomer |
|---|---|
| Thickness range | 0.3-12 mm |
| Typical thickness | 1-3 mm |
| Size range | 3 mm features to 500 x 500 mm pads |
| Temperature range | -50 to 200 C |
| Hardness range | Shore 00 20-70 |
| Tolerance | Typically +/-0.20 mm profile; thickness and thermal grade dependent |
| Standards | UL 94 rating, dielectric test data, RoHS and REACH documentation by selected thermal grade. |
MATERIAL SELECTION
Die-Cut Silicone Thermal Gap Pads Material Comparison
Use this as a starting point only; the selected grade and construction are confirmed against the drawing and application.
| Material | Primary strength | Selection focus | Best fit |
|---|---|---|---|
| Silicone gap filler pads | Silicone gap pads combine conformability, dielectric strength and stable thermal performance without pump-out common to grease-based interfaces. | Use a soft low-modulus pad for uneven gaps; select reinforced grades when handling strength or puncture resistance is important. | Power supplies, LED modules, battery packs, inverters, telecom hardware, motor controllers and heat-sink interfaces. |
| fiberglass-reinforced silicone pads | Thermal conductivity, dielectric strength, compression force and tack vary by selected filler loading and grade. | Use a soft low-modulus pad for uneven gaps; select reinforced grades when handling strength or puncture resistance is important. | Power supplies, LED modules, battery packs, inverters, telecom hardware, motor controllers and heat-sink interfaces. |
| phase-change materials and electrically conductive silicone alternatives. | Thermal conductivity, dielectric strength, compression force and tack vary by selected filler loading and grade. | Use a soft low-modulus pad for uneven gaps; select reinforced grades when handling strength or puncture resistance is important. | Power supplies, LED modules, battery packs, inverters, telecom hardware, motor controllers and heat-sink interfaces. |
PRODUCT EXAMPLES
Custom Part Gallery
CONVERTING OPTIONS
Manufacturing & Finish Options
Define the assembled gap, clamp force and target thermal impedance; a thicker pad does not automatically improve heat transfer.
Custom Die Cutting
A repeatable route for defined profiles after tooling and project review.
Custom Die Cutting →Kiss Cutting
Liner-retained parts and pull-tab layouts for placement workflows.
Kiss Cutting →Industrial Laminating
Layered material constructions developed as a complete assembly.
Industrial Laminating →Custom Gasket Prototyping
Sample parts for fit, material and assembly validation before production.
Custom Gasket Prototyping →DESIGN REVIEW
Engineering Guide
Practical points to include when selecting foam and preparing a drawing for review.
Geometry and thickness
Use the thinnest pad that reliably fills the tolerance stack without exceeding the component compression-force limit.
Assembly performance
Validate thermal performance in the final stack-up because surface roughness, pressure and gap variation affect interface resistance.
Production route
Define the assembled gap, clamp force and target thermal impedance; a thicker pad does not automatically improve heat transfer.
Applications / Where It Fits
Custom thermal interface pads die cut for electronics that need controlled heat flow, gap filling and dielectric isolation. The final specification is established around the drawing and operating requirements.
When This Part May Not Be the Best Choice
Directly exposed high-wear surfaces, applications requiring an electrically conductive interface, or extremely thin bond lines better served by phase-change films.
Alternative parts to consider
Custom Adhesive-Backed EVA Foam PadsSilicone PadsCustom Die-Cut Silicone GasketsPROJECT DELIVERY
Manufacturing Capabilities
Available options are confirmed against the selected material, drawing and order requirements.
| Capability | Options |
|---|---|
| Manufacturing process | Precision die cutting, kiss cutting, laminating and protective-liner converting |
| Adhesive options | Natural tack, single-sided positioning adhesive and low-tack handling liner. |
| Surface options | Smooth, glass-fibre reinforced, low-tack and lightly adhesive surfaces. |
| Custom options | Outline, thickness, thermal conductivity grade, reinforcement, tabs, liner and multi-part kits. |
| Standards | UL 94 rating, dielectric test data, RoHS and REACH documentation by selected thermal grade. |
Drawing Requirements
Recommended drawing formats
Please include
- compressed gap
- heat source
- heat sink
- dielectric requirement
- clamp force and keep-out zones
For a precise die-cut silicone thermal gap pads quotation, provide compressed gap, heat source, heat sink, dielectric requirement, clamp force and keep-out zones.
Frequently Asked Questions
What thickness thermal pad should I use?
Measure the compressed assembly gap and select the thinnest grade that maintains contact without overstressing the components.
Are silicone gap pads electrically insulating?
Most standard grades are dielectric; confirm the required breakdown voltage against the selected material data.
Can one pad include holes and irregular cut-outs?
Yes. Die cutting can follow component clearances, mounting holes and keep-out zones.
Do higher conductivity pads always cool better?
Not necessarily. Overall performance also depends on pad thickness, compression, contact area and the heat-sink design.
What should a drawing include for die-cut silicone thermal gap pads?
Include compressed gap, heat source, heat sink, dielectric requirement, clamp force and keep-out zones.
Can die-cut silicone thermal gap pads be supplied for production assembly?
Yes. Define the assembled gap, clamp force and target thermal impedance; a thicker pad does not automatically improve heat transfer. Delivery format, liner configuration and packaging are specified for the assembly workflow.
How is the right die-cut silicone thermal gap pads construction selected?
Use a soft low-modulus pad for uneven gaps; select reinforced grades when handling strength or puncture resistance is important. The drawing and operating conditions establish the final construction.
CONTINUE YOUR RESEARCH
Related Parts, Materials & Capabilities
DRAWING-BASED MANUFACTURING
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