Circuit Breaker Terminals

The "wave-shaped contact spring + elastic crimp structure" design increases the contact area between the Screw Connector Block and the circuit breaker output bar by 40% compared to traditional flat terminals. Combined with a silver-plated surface (thickness ≥ 8μm), the contact resistance remains stable below 50μΩ. Even in temperatures as low as -40°C (shrinkage) or as high as 85°C (expansion), the spring maintains constant pressure, preventing loosening caused by thermal expansion and contraction, thus reducing the risk of overheating.

The Screw Block Terminal body is constructed of PA66 + 30% glass fiber reinforced plastic, with a temperature resistance of up to 125°C (UL 94 V-0 flame retardant). The exterior is covered with a transparent PC insulation shield, forming a "double insulation layer" with the terminal. Creepage distance ≥ 8mm/kV, withstanding AC 3000V/1min without breakdown. The shield's edges are designed with diversion grooves to direct arc energy outward, preventing burns to adjacent components.

The Electrical Screw Terminals feature a "positioning key + anti-misalignment slot" design, precisely aligning with the mounting holes on the circuit breaker's outlet bar. Assembly requires no additional calibration, reducing installation time to under 15 seconds. For multi-pole terminals (such as 3P and 4P), each pole is color-coded (yellow/green/red/blue) and numbered to eliminate the risk of misconnection. Select models support "plug-and-play" wire crimping and are compatible with AWG 10-2/0, reducing the need for on-site stripping and crimping tools.

The Screw Lug Terminal surface is treated with a nano-ceramic coating, which proved corrosion-free for 96 hours in a salt spray test (ASTM B117), making it suitable for high-humidity, high-salt environments such as coastal and chemical industries. Internal conductive components are made of 59-1 brass (copper content ≥ 59%), which undergoes a continuous annealing process to eliminate internal stress and has a tensile strength of ≥ 300 MPa. The structure remained stable during vibration testing (IEC 60068-2-6, 10g/10-2000Hz), with no loose screws or loose solder joints.

We offer a dual-track solution: "Standard Products + Customization." Standard products cover the specifications of Screw Clamp Type Terminals blocks for mainstream circuit breaker brands such as Schneider, ABB, and Siemens (e.g., MT series and Tmax series). Customization services support special current ratings (e.g., high-current terminals above 10kA), special-shaped structures (e.g., vertical terminal blocks), and special certifications (e.g., CCS for marine applications and EN 50155 for railway applications). From request confirmation to sample delivery, the turnaround time is as short as 20 working days.