PBT Compounds for Electrical & Electronic Components
Good electrical insulation, dimensional stability and heat resistance make PBT one of the most specified plastics in connectors and switchgear.
What Is PBT?
Polybutylene terephthalate (PBT) is a semi-crystalline engineering thermoplastic valued for its excellent electrical insulation properties, low moisture absorption, good dimensional stability and resistance to heat and many chemicals - properties that align closely with electrical component requirements.
Why Glass-Filled PBT Is Common
Unfilled PBT has moderate strength, so most electrical and connector applications use glass fibre reinforced grades (commonly 15-30% glass), which significantly increase stiffness, strength and heat deflection temperature while retaining good electrical performance.
Flame-Retardant PBT Grades
Many PBT applications in electrical housings and connectors require specific UL94 flammability ratings; flame-retardant PBT compounds are formulated to meet these standards without significantly compromising mechanical or electrical properties.
Typical Applications
PBT compounds are used in connectors, circuit breaker housings, switch components, automotive electrical parts, and precision moulded parts requiring tight tolerances and long-term dimensional stability.
Siya Polymer supplies PBT compounds engineered for electrical insulation, strength and flame-retardant requirements.
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