Terminal Blocks: Creating The Safest Current Path
Terminal blocks are the "joints" in electrical connections. Although they are small in size, they bear the core mission of current transmission and equipment safety. The design accuracy, material selection, and manufacturing process directly determine the stability and reliability of the circuit. From household circuits to industrial equipment, from new energy vehicles to aerospace, wiring terminals adhere to the principle of "safety first" and constantly break through safety boundaries through technological innovation.
Material selection: High temperature resistance and corrosion resistance are the foundation
The conductive part of the terminal block is usually made of high-purity copper material, such as purple copper or tin plated copper, with a conductivity of over 98%, which can effectively reduce heat generation and energy loss. To cope with complex environments, some terminal surfaces are nickel plated or silver plated, which not only improves oxidation resistance but also enhances corrosion resistance. For example, high-voltage connectors for new energy vehicles use silver plated terminals, which can work stably at extreme temperatures ranging from -40 ℃ to 150 ℃, avoiding fires caused by poor contact. The insulation part is made of flame-retardant engineering plastics such as PC and PA66, with a flame-retardant rating of V0 (extinguishing immediately upon ignition), which can prevent the spread of fire even if a short circuit generates an arc.
Structural design: anti loosening and anti misplacement are key factors
Safe terminal blocks reduce human operational risks through structural innovation. For example, terminals with "foolproof design" allow only specific specifications of wires to be inserted to avoid short circuits caused by incorrect insertion; The spring type wire pressing structure fixes the wire with elastic pressure, ensuring stable contact even in vibration environments; Some industrial terminals are equipped with a "double locking" mechanism, which requires simultaneous pressing and rotating of the lock buckle to prevent accidental operation and power failure. In addition, the transparent window design allows for intuitive observation of the wire crimping status, facilitating regular maintenance.
Certification standard: Strict testing to build a secure defense line
International certification is the "passport" for the safety of wiring terminals. UL, CE, CCC and other certifications require terminals to pass dozens of rigorous tests such as voltage withstand test (such as 2000V/1 minute no breakdown), temperature rise test (temperature ≤ 55 ℃ under long-term load), salt spray test (96 hours no corrosion), etc. For example, aerospace terminals need to undergo "vibration testing" (simulating severe vibrations during aircraft takeoff and landing) and "thermal cycling testing" (rapid switching from -55 ℃ to 125 ℃) to ensure reliable operation under extreme conditions.
From materials to structure, from design to certification, wiring terminals aim for "zero hidden dangers", using precision craftsmanship and strict standards to create a safe and stable path for current.
