PEEK: The Ultimate High-Performance Material for Precision Electrical Terminals and Connectors

As new energy systems, smart manufacturing, 5G communications, and high-end industrial control equipment rapidly evolve toward higher speeds, higher voltages, miniaturization, and greater reliability, electrical connection systems face unprecedented demands on insulation performance, structural stability, temperature resistance, and safety margins.

Traditional engineering plastics such as PA, PBT, and PC - commonly used for terminal and connector housings - share persistent limitations: insufficient heat resistance, vulnerability to high-voltage breakdown, long-term aging and cracking, and dimensional inconsistency. These shortcomings make them poorly suited for the sustained, safe operation of high-end precision electrical equipment.

PEEK (Polyetheretherketone), a premium specialty engineering plastic, has emerged as the core insulating structural material for high-end precision terminals, connectors, and plug-in components. With its combination of ultra-high insulation, long-term temperature resistance, zero dimensional drift, high strength and aging resistance, and inherent flame retardancy, PEEK is comprehensively replacing conventional plastics to make electrical connections safer, more stable, and more durable.

Exceptional Electrical Insulation: Building a High-Voltage Safety Barrier

Terminals serve as the critical connection points for circuit signal and power transmission, making insulation stability a core safety metric. PEEK exhibits outstanding dielectric performance - high breakdown voltage and stable insulation resistance - maintaining excellent insulating properties under high-frequency, high-voltage, and humid conditions. It resists leakage, resists breakdown, and eliminates arc hazard risks.

Compared to ordinary plastic materials, PEEK effectively prevents creepage, flashover, and insulation failure in high-voltage terminals. It is ideally suited for insulation protection in new energy high-voltage terminals, industrial control connectors, and precision communication plug-in components, significantly enhancing the operational safety and anti-interference capability of electrical equipment.

Ultra-High Temperature Resistance and Thermal Aging Performance

Electrical terminals generate continuous heat under high-frequency energization and high-current operation, with significant ambient temperature fluctuations. Ordinary plastics soften, deform, embrittle, and crack under prolonged high-temperature conditions, leading to terminal loosening, poor contact, and circuit failure.

PEEK withstands continuous temperatures up to 260°C, with short-term resistance up to 315°C. It does not soften or deform at elevated temperatures, and its dielectric properties remain undegraded. It possesses exceptional resistance to thermo-oxidative aging. Even under conditions of continuous long-term energization, sealed high-temperature environments, and thermal cycling, PEEK terminal structural components maintain stable morphology and insulation performance — thoroughly resolving the persistent industry problems of high-temperature failure and short service life in traditional terminals.

Ultra-High Dimensional Precision and Stability for Miniaturization

Modern high-end electrical equipment increasingly trends toward miniaturization, high density, and fine precision. Terminal pin spacing is smaller and structures are more refined, placing extreme demands on material molding precision and dimensional stability.

PEEK features an extremely low molding shrinkage rate and near-zero water absorption. In humid, high-temperature, and high-pressure environments, it does not swell from moisture absorption, does not warp or deform, and maintains precise structural dimensions and plug-in fit accuracy over the long term. This effectively prevents issues such as terminal insertion jamming, fit clearance deviation, and poor contact — ensuring the precision and stability of precision connectors through repeated insertion cycles and extended use.

High Strength, Wear Resistance, and Flame Retardancy for Extended Service Life

Terminal connectors require repeated insertion and removal and operate under long-term vibration, making them susceptible to wear, cracking, and structural loosening. PEEK offers metal-comparable mechanical strength, excellent fatigue resistance, and outstanding wear performance — withstanding tens of thousands of insertion cycles and prolonged equipment vibration and shock without structural damage or loosening.

Additionally, PEEK possesses inherent flame-retardant properties, achieving high-standard flame retardancy ratings without the addition of flame retardants. It is low-smoke, non-toxic, and explosion-resistant — effectively containing fire propagation in electrical fault overheating and short-circuit high-temperature scenarios, substantially improving equipment safety redundancy.

Broad Application Across Industries

From new energy high-voltage connections and industrial control precision terminals to 5G communication plug-in components, high-end medical electronics, and automotive precision connectors, PEEK material delivers the hard-core advantages of stable insulation, high temperature resistance, precise dimensions, long service life, and robust safety. It resolves the core challenges of traditional terminal materials - poor high-temperature performance, susceptibility to aging, leakage risk, and dimensional instability.

As the domestic upgrading of high-end electronic and electrical systems progresses, PEEK has become the key core material in the precision connection field, providing solid material assurance for stable power transmission, safe connections, and long-term reliable operation across all types of high-end equipment.