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Premium GPO3 Fiberglass & UPGM 203 Insulation Sheets

High-performance, halogen-free, flame-resistant electrical insulation materials engineered for reliability in extreme environments.

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Your Professional & Reliable Partner

Xiamen Hongcheng Insulating Material Co., Ltd. is a national hi-tech enterprise and wholly-owned subsidiary of Xiamen Hongcheng Technology Group. Located in Xiamen Special Economic Zone, we specialize in R&D, production, sales, and deep processing of advanced non-metallic insulation materials.

With over 100 CNC and digital-controlled machines, we deliver precision-engineered GPO3 Fiberglass Sheets, UPGM 203 Insulation Sheets, and custom pultruded profiles to global clients across industries including photovoltaics, power transmission, rail, and industrial automation.

Our annual production value exceeds 100 million RMB, and we proudly serve industry leaders like Sungrow Power as their primary insulation bracket supplier.

Custom Mould Product
8M+
Annual Sales (RMB)

Our Premium Products

Engineered for performance, durability, and safety — our range includes high-flexural-strength laminates, arc-resistant sheets, and custom-molded insulation components.

GPO3 Fiberglass Sheet

GPO3 Fiberglass Sheet

  • • High Flexural Strength
  • • UL94-V0 Flame Rating
  • • Excellent Dielectric Properties
  • • CNC Machinable
UPGM 203 Insulation Sheet

UPGM 203 Insulation Sheet

  • • Halogen-Free & Low Smoke
  • • CTI600 Rating
  • • EN45545 Compliant
  • • High Arc Resistance (180S)
Custom U-Channel

Custom U-Channel Profiles

  • • Pultruded Fiberglass
  • • Stable Structural Design
  • • Custom Grooves & Shapes
  • • Environmentally Friendly
Pultruded Fiberglass Tube

Pultruded Fiberglass Tube

  • • Heat Resistant
  • • Imported Fire Retardant
  • • Lightweight & Durable
  • • Custom Lengths & Diameters
Insulation Corner Bone

Insulation Corner Bone

  • • 180°C Heat Resistance
  • • GPO3 Material
  • • Precision Pultruded
  • • Ideal for HV Switchgear
RoHS Certified U-Channel

RoHS Certified U-Channel

  • • RoHS & REACH Compliant
  • • Eco-Friendly Cable Bridge
  • • High Strength-to-Weight Ratio
  • • Corrosion Resistant
FR4 Epoxy Sheet

FR4 Epoxy Sheet

  • • High Mechanical Strength
  • • Excellent Electrical Insulation
  • • CNC Machinable
  • • Used in Inverter Cabinets
Custom Mould Product

Custom Mould Products

  • • Tailored to Design Specs
  • • Heat & Crack Resistant
  • • Rapid Prototyping
  • • OEM/ODM Supported

Why Choose Our Materials?

UL94-V0

Flame Retardant

Meets strict fire safety standards with self-extinguishing properties and low smoke emission.

180S

Arc Resistance

Withstands high-voltage arcing up to 180 seconds, ideal for HV switchgear and power systems.

CTI600

High CTI Rating

Superior comparative tracking index ensures long-term insulation reliability.

EN45545

Rail Compliance

Certified for use in railway applications with low toxicity and smoke generation.

Real-World Applications

Trusted by global leaders in energy and infrastructure.

Sungrow Power Partnership

Xiamen Hongcheng is the primary supplier of GPO3 and FR4 insulation components for Sungrow Power, the world’s largest photovoltaic inverter manufacturer.

  • • Supply of GPO3 pultrusion parts
  • • FR4 structural brackets
  • • Custom CNC-machined insulation
  • • Used in DC-to-AC inverter cabinets

ABB Insulation Solutions

Delivered halogen-free, high-strength UPGM 203 sheets for ABB’s industrial switchgear systems.

  • • UL183S arc resistance
  • • RoHS & REACH compliant
  • • Low smoke & zero halogen
  • • Stable under thermal cycling
100+
Machines
100M+
Annual Output (RMB)
15+
Countries Served
20+
Years Experience

Frequently Asked Questions

What is GPO3 Fiberglass Sheet?

GPO3 (General Purpose Ortho) is a glass fiber reinforced thermoset polyester laminate known for high mechanical strength, excellent electrical insulation, and flame resistance. It is widely used in electrical enclosures, switchgear, and industrial components.

Is UPGM 203 halogen-free?

Yes, UPGM 203 is a halogen-free insulation material designed for applications requiring low smoke and zero halogen emission during combustion, making it ideal for rail, marine, and public infrastructure.

Can you customize shapes and sizes?

Absolutely. We offer full customization via CNC machining, pultrusion, and mold production. Send your design files for a quote.

What certifications do your products have?

Our materials are UL94-V0 rated, RoHS certified, and compliant with EN45545 standards. We also provide CTI600 and 180S arc resistance testing reports.

Get in Touch

Need a quote or technical support? Visit our official website to connect with our team.

Visit Official Website

Xiamen Hongcheng Insulating Material Co., Ltd.

Phone: 86-592-3922709

Mobile: 0086-18150169195

Email: sales300@hc-materials.com

Address: No.501, Hongye Bldg., Pioneering Park, Xiamen Torch Hi-tech Industrial Zone, Xiamen, 361009, China

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