Coil Bobbin

The Coil Bobbin serves as the insulating core former for electromagnetic drive coils in electrical switching devices such as contactors, control relays, and solenoids. Engineered to withstand high thermal and mechanical stress, this spool provides a non-conductive framework around which magnet wire is wound while accommodating the laminated iron core inside its central rectangular passage.

Key Features & Design Highlights

• Square Core Channel: Hollow central rectangular passage allows direct insertion of magnetic core plates or moving plungers for efficient magnetic flux transfer.

• Integrated Lead Out & Terminal Channels: Built-in slots and guide cavities along the top flange secure wire ends and house terminal pins or quick-connect contacts.

• High Thermal & Dielectric Plastic: Molded from heat-resistant engineering polymer (such as glass-filled polyamide) to resist elevated coil operating temperatures without deforming.

• Reinforced Flange Walls: Sturdy top and bottom flanges prevent wire bulging during high-tension coil winding operations and maintain physical creepage distance from surrounding hardware.

Technical Specifications

• Product Name: Coil Bobbin / Solenoid Coil Spool / Coil Former

• Material: High-Temperature Glass-Filled Thermoplastic

• Color: Industrial Dark Gray

• Core Design: Square / Rectangular Pass-Through Channel

• Mounting / Connection: Snap-In Terminal Retention Slots

• Applications: Power Contactors, Relays, Solenoid Actuators, Transformers, and Magnetic Switchgear Assemblies