Introduction
The 0.35–0.5 mm 3003 PE coated aluminum coil is currently the global mainstream specification for refrigerator back panels (also called condenser guards, rear covers or structural back sheets) among tier-1 appliance manufacturers.
This ultra-thin gauge achieves the best balance between:
Adequate structural rigidity for large refrigerator bodies
Maximum weight reduction (critical for energy label & logistics cost)
Outstanding heat dissipation from condenser coils
Cost-effective PE coating for daily kitchen humidity & splash protection
Compared to 1100 (softer) or 5052 (stronger but more expensive), 3003 offers:
20% higher strength than 1100 → better dent resistance,Thermal conductivity ~160–170 W/m·K → fast condenser heat transfer,Excellent PE coating adhesion & long-term color stability
Coating system
18–25 μm high-durability polyester (PE) coating
Double-layer baking (primer + topcoat),Standard colors: RAL 9003 signal white / RAL 7035 light gray,Warranty: 20–25 years indoor corrosion & color stability
Product Parameters:
| Product | Aluminum Alloy 3003 Aluminum Coil for Refrigerator Back Panel Thickness 0.35–0.5 mm | Width 1240 mm | PE Coating |
| Thickness | 0.01mm-2.5mm |
| Width | 600-1500mm |
| Materia | 3003 |
| Temper | O, H12, H14, H16, H18, H24, H26, H32, H34, etc |
| Inner Diameter | 405mm,505mm,150mm,etc. |
| Color | RAL, Pantone Color Or As Alient's Demand |
| Coating thickness | PVDF Paint Coating: Not Less Than 25um |
| PE Paint Coating : Not Less Than 18um |
| Packing | Export Standard Wooden Pallets (Eye To Wall,Eye To Sky) |
| Payment Terms | L/C at sight or 30% T/T in advance as deposit, and 70% balance against the B/L copy. |
| MOQ | 1 Ton Per Specification |
| Delivery Time | Within 30 Days |
| Loading Port | Shanghai Port |
| Application | Refrigerator Back Panel |
Advantages
Core Benefits:
| Advantage | Detailed description |
| Excellent Thermal Conductivity | ~160–170 W/m·K,condenser cooling 20–30% faster. |
| Superior Corrosion Resistance | ≥2000 h neutral salt spray,ideal for humid kitchens. |
| High Strength in Ultra-Thin Gauge | 3003 yield 145–195 MPa,better dent resistance than 1100. |
| Outstanding Deep-Draw Formability | 1T–2T bend, complex ribbed / embossed designs. |
| Significant Weight Reduction | 0.45 mm ≈ 1.22 kg/m² vs 0.6 mm steel ≈ 4.7 kg/m² → ~74% lighter. |
| Fingerprint-Resistant & Easy-Clean | PE topcoat + optional nano layer,fingerprints wipe off easily. |
Case Studies
1.Haier Casarte French-Door Series (China & Export)
Thickness: 0.45 mm 3003 white PE coated
Environment: high-humidity kitchens
Result: 20-year warranty, zero corrosion complaints
2.LG SIGNATURE InstaView Refrigerator (Korea & North America)
Thickness: 0.5 mm 3003 light gray PE
Environment: humid + frequent cleaning
Result: excellent heat dissipation, fingerprint-resistant surface
3.Samsung Bespoke 4-Door Flex (Global 2025–2026)
Thickness: 0.4–0.5 mm 3003 custom color PE
Environment: coastal & urban climates
Result: 25% faster production line, perfect flatness
4.Boshi Serie 8 Built-in Bottom-Freezer (Europe)
Thickness: 0.5 mm 3003 pure white PE
Environment: hard water + high humidity
Result: zero white rust after 5000 h damp-heat test
5.Midea All Easy Pro Series (Southeast Asia)
Thickness: 0.45 mm 3003 white PE
Environment: 90%+ humidity + frequent splash
Result: 15 million+ units, no corrosion claims
International Applications
Flagship & premium refrigerators:Haier Casarte/Commander, LG SIGNATURE, Samsung Bespoke, Boshi Serie 8
Mass-market & smart models:Midea, Hisense, Whirlpool, Beko, TCL
High-humidity markets:Southeast Asia, Middle East, India, Brazil, Southern China
North America & Europe replacement/retrofit:after-sales service & energy-upgrade panels
Mega Trends
Ultra-thin acceleration:0.30–0.40 mm 3003/3105 becoming new standard
Heat-reflective white mainstream:high solar reflectance (TSR >80%) for better energy label
Digital-print metallic & wood-grain:on PE base for premium appearance
Antimicrobial & easy-clean:nano silver + fingerprint-resistant topcoat
Circular economy push:95%+ recycled content 3003 coils with traceability
Smart integration:conductive coating + embedded temperature sensors
Upcoming Applications
Smart IoT refrigerators with active cooling channels
EV mobile refrigeration & cold-chain units
Space station compact food storage panels
Mars habitat thermal-regulation food cabinets
Call to Action
Want a refrigerator back panel that cools faster and never rusts for over 20 years?
Contact us to learn about 0.45 mm white PE sample roll, heat conduction & corrosion resistance test report, and real brand case package.
24-hour fast quotation
Contact Dingang now — make every refrigerator cool and long-lasting!
T: 0086 13961220663
E:gavin@cnchangsong.com
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3003 Aluminum Coil for Refrigerator Back Panel with 0.35–0.5mm Thickness and 1240mm Width PE Coating Images
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