Thermal - Pads, Sheets

Part Number	Description / PDF	Quantity
EYG-A121807KV Panasonic	THERM PAD 180MMX115MM W/ADH GRAY	0
EYG-N0912QC6S Panasonic	THERM PAD 115MMX90MM W/ADH WHITE	9
EYG-S0509ZLMH Panasonic	THERM PAD 86MMX51MM GRAY	17
EYG-TE0E0A20A Panasonic	GRAPHITE PAD 140X140MM, 2.0MM TH	0
EYG-R0612ZRWF Panasonic	THERM PAD 60X120X0.35MM GRAY	9
EYG-S1010ZLME Panasonic	THERM PAD 98MMX98MM GRAY	20
EYG-R0309ZLMF Panasonic	THERM PAD 32X92X0.25MM GRAY	0
EYG-R0509ZLMH Panasonic	THERM PAD 51X86X0.25MM GRAY	0
EYG-S182305DP Panasonic	THERM PAD 230MMX180MM GRAY	10
EYG-R1212ZRGC Panasonic	THERM PAD 120X120X0.35MM GRAY	10
EYG-R0303ZLSP Panasonic	THERM PAD 29X32X0.25MM GRAY	40
EYG-S0925ZLWA Panasonic	THERM PAD 246MMX85MM GRAY	8
EYG-A091201V Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	0
EYG-R0925ZLWA Panasonic	THERM PAD 85X246X0.25MM GRAY	10
EYG-R0607ZRGL Panasonic	THERM PAD 58X69.7X0.35MM GRAY	20
EYG-S0309ZLAK Panasonic	THERM PAD 89.5MMX29.5MM GRAY	18
EYG-R0613ZLSE Panasonic	THERM PAD 61X127.5X0.25MM GRAY	0
EYG-N0912QF4S Panasonic	THERM PAD 115MMX90MM W/ADH WHITE	2
EYG-TF0F0A15A Panasonic	GRAPHITE PAD 150X150MM, 1.5MM TH	12
EYG-R0512ZRGE Panasonic	THERM PAD 53X118X0.35MM GRAY	0

Thermal - Pads, Sheets

1. Overview

Thermal pads and sheets are thermally conductive materials used to transfer heat away from electronic components to heat sinks or ambient environments. They fill air gaps between uneven surfaces, improving thermal efficiency. These materials are critical in modern electronics, automotive systems, and industrial equipment to prevent overheating, enhance reliability, and ensure compliance with safety standards.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Silicone-Based Pads	High flexibility, low compression force, dielectric insulation	Smartphones, laptops, LED lighting
Non-Silicone Pads	Lower cost, reduced silicone oil migration	Power supplies, industrial controls
Phase Change Materials (PCM)	Softening at operational temperatures for better contact	CPUs, GPUs, servers
Metal-Backed Pads	Aluminum/copper reinforcement for structural support	EV battery packs, high-power lasers
Graphite Sheets	Ultra-thin, anisotropic heat spreading	5G base stations, wearable devices

3. Structure and Composition

Typical thermal pads consist of:

Base Material: Silicone rubber (standard), polyurethane (low-cost), or epoxy (rigid)
Filler: Aluminum oxide, boron nitride, or silver-coated particles for thermal conductivity
Adhesive Layers: Pressure-sensitive acrylic or silicone adhesives (optional)
Reinforcement: Fiberglass mesh or metal foils for mechanical stability

4. Key Technical Parameters

Parameter	Importance
Thermal Conductivity (W/m K)	Measures heat transfer efficiency (ASTM D5470)
Thickness (mm)	Impacts contact resistance and compression force
Operating Temperature Range ( C)	Determines material stability under thermal stress
Hardness (Shore 00)	Affects conformability to surfaces
Adhesion Strength (N/mm )	Critical for mechanical fixation
Electrical Insulation (kV/mm)	Essential for high-voltage applications

5. Application Fields

Major industries include:

Consumer Electronics: Mobile phones (e.g., Samsung Galaxy series), tablets, gaming consoles
Automotive: EV battery thermal management (Tesla Model 3), powertrain inverters
Telecom: 5G base stations (Huawei AAU modules), optical transceivers
Industrial: CNC machines, medical imaging equipment
Aerospace: Avionics cooling systems

6. Leading Manufacturers & Products

Manufacturer	Representative Product	Key Specification
Laird Performance Materials	THERM-A-GAP GEL 15	15 W/m K, 0.5mm thickness
Bergquist (Henkel)	Gap Pad 1500S	Silicone-free, 8.0 W/m K
3M	5595 PCM	Phase change at 55 C, 12 W/m K
Fujipoly	SARCON Matrix MG	Metal-gel hybrid, 20 W/m K
Momentive	TSE 3045	Graphite sheet, 400 W/m K (in-plane)

7. Selection Guidelines

Key considerations:

Thermal Requirements: Calculate required thermal conductivity based on power dissipation (using Fourier's Law)
Mechanical Constraints: Evaluate hardness-thickness trade-offs for housing clearance
Environmental Factors: Check temperature/chemical resistance for outdoor/automotive use
Cost Optimization: Balance performance vs. budget (e.g., graphite sheets cost 30% more than silicone pads)
Regulatory Compliance: Ensure RoHS/REACH certification for EU markets

8. Industry Trends

Emerging trends include:

Ultra-Thin Materials: 0.1mm graphite sheets for foldable devices
High-Conductivity Composites: Boron nitride nanotube-enhanced pads (30+ W/m K)
Smart Thermal Interfaces: Electro-responsive materials with tunable conductivity
Green Manufacturing: Water-based silicone formulations reducing VOC emissions
Integrated Solutions: Combination pads with embedded temperature sensors