Contactor Arc Chute & Insulating Frame Assembly

The Contactor Arc Chute & Insulating Frame Assembly is a core internal structural component designed for industrial AC contactors and heavy-duty motor starters. It functions as both a rigid internal mounting skeleton and an arc suppression chamber. By housing the contact carrier springs, moving copper contacts, electromagnetic drive coil, and arc chute baffles, this sub-assembly safely suppresses high-voltage electrical arcing while maintaining accurate contact alignment.

Key Features & Design Highlights

• Integrated Arc Chamber Structure: Encloses the moving power contacts within high-dielectric walls to contain, cool, and rapidly extinguish electrical arcs formed during circuit interruption.

• Pre-Assembled Internal Core: Integrates the central armature carrier, spring-loaded copper contacts, and electromagnetic coil housing for streamlined main assembly lines.

• Precision Moving Carrier Guides: Built-in vertical track alignment ensures smooth, low-friction linear movement of the contact bridge during switching operations.

• High Arc-Resistance Polymer Construction: Molded using specialized glass-filled thermoset/thermoplastic material that resists high thermal shock, carbon tracking, and arc erosion.

• Top Terminal Access Flanges: Integrated upper guide flanges feature clear circular access points for quick wire routing and terminal screw tightening.

Technical Specifications

• Product Type: Internal Insulating Support & Arc-Chute Sub-Assembly

• Material: Flame-Retardant Glass-Reinforced Nylon (PA66-GF) / PBT

• Colors: Dark Gray (Outer Frame) & Light Gray / Off-White (Internal Carrier)

• Internal Components Included: Main Contact Carrier, Pressure Springs, Copper Contact Bridge, and Coil Housing Cage

• Applications: Heavy-Duty Industrial AC/DC Contactors, Reversing Starters, and Power Switching Relays