Date | 2026-04-06 09:11:26
Wenzhou Jintong Complete Electrical Co., Ltd. announces that its high-performance thermoset composite, BMC 1616, has successfully completed comprehensive testing at a CNAS-accredited third-party laboratory.
The results confirm that the material achieves UL94 V-0 flame retardancy at an ultra-thin wall thickness of 0.4 mm, while maintaining strong electrical and mechanical performance.
As electrical devices continue to evolve toward miniaturization and higher integration, internal component thickness is rapidly decreasing.
In applications such as:
Miniature Circuit Breakers (MCB)
Smart meters
Relays
critical insulation components are often below 1 mm thickness.
However, safety standards remain unchanged.
This creates a fundamental challenge:
Can materials maintain the highest level of flame retardancy under extreme thin-wall conditions?
Even minor material deformation or insufficient flame resistance can lead to:
Reduced creepage and clearance distances
Loss of mechanical preload
Increased electrical failure risk
Thin-wall flame retardancy is not just a material property—it defines the safety boundary of electrical systems.
UL94 V-0 is one of the most stringent flammability standards for plastics, requiring:
Self-extinguishing within 10 seconds after flame exposure
No flaming drips igniting cotton
At 0.4 mm thickness, the challenge intensifies:
Faster heat accumulation
Reduced structural integrity
Higher risk of melt dripping
This test represents a true engineering limit for material performance.
As a thermoset composite, BMC forms a permanently crosslinked 3D network during curing.
This enables:
No melting under flame
No dripping behavior
Rapid formation of a protective char layer
Even at 0.4 mm thickness, structural integrity is maintained during combustion.
Excellent dielectric strength
High resistance to tracking and arc formation
Reliable operation in high-voltage environments
Low thermal expansion
Controlled shrinkage
Maintains geometry under long-term thermal stress
Flame resistance is achieved through material design, not additive migration.
No halogen-based additives
Compliant with RoHS and REACH
Stable long-term fire performance
Testing was conducted by a CNAS-accredited laboratory, operating under ISO/IEC 17025 standards.
For customers, this provides:
Test reports are accepted across ILAC-MRA member countries, supporting global market access.
CNAS accreditation represents a recognized benchmark of laboratory competence in electrical and automotive industries.
All test data is generated under controlled, auditable procedures.
BMC 1616 is ideal for space-constrained, safety-critical electrical components, including:
MCB housings and arc chambers
Smart meter enclosures and insulation parts
Relay bases and insulation structures
EV charging systems and distribution units
Switchgear insulation components
Material capability alone is not enough.
At Wenzhou Jintong, we integrate:
Material formulation
Precision mold design
Compression molding process control
to ensure that thin-wall V-0 performance is consistently achieved in mass production.
As electrical systems become more compact, materials must deliver higher performance in less space.
BMC 1616 provides a proven solution:
UL94 V-0 at 0.4 mm
High insulation reliability
Long-term dimensional stability
validated by CNAS-accredited testing.
Wenzhou Jintong Complete Electrical Co., Ltd. specializes in BMC/SMC thermoset composites, precision mold design, and compression molding for electrical and industrial applications.
