Thermal - Pads, Sheets

Part Number	Description / PDF	Quantity
EYG-R0411ZLWJ Panasonic	THERM PAD 43X105.5X0.25MM GRAY	20
EYG-N0912QD3S Panasonic	THERM PAD 115MMX90MM W/ADH WHITE	4
EYG-A091203PM Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	0
EYG-A091204F Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	18
EYG-S0204ZLSN Panasonic	THERM PAD 36.5MMX24MM GRAY	0
EYG-R0410ZRSJ Panasonic	THERM PAD 43X103X0.35MM GRAY	20
EYG-R0410ZLAJ Panasonic	THERM PAD 43X102.8X0.25MM GRAY	20
EYG-S1216ZLWD Panasonic	THERM PAD 160MMX120MM GRAY	6
EYG-A091205V Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	0
EYG-A091205RV Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	0
EYG-S1316ZLAC Panasonic	THERM PAD 163MMX125MM GRAY	8
EYG-T3535A20A Panasonic	THERM PAD 35MMX35MM W/ADH BLACK	0
EYG-A091201M Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	97
EYG-T3535A15A Panasonic	THERM PAD 35MMX35MM W/ADH BLACK	0
EYG-S1314ZLWE Panasonic	THERM PAD 136MMX126MM GRAY	10
EYG-R0309ZRMF Panasonic	THERM PAD 32X92X0.35MM GRAY	0
EYG-A091201PA Panasonic	THERM PAD 115MMX90MM W/ADH GRAY	17
EYG-S0813ZLMD Panasonic	THERM PAD 123MMX71MM GRAY	14
EYG-R0610ZLAH Panasonic	THERM PAD 59.4X104.4X0.25MM GRAY	20
EYG-A121804RV Panasonic	THERM PAD 180MMX115MM W/ADH 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