75D70550F

The 75D70550F is a high-grade magnetic operating replacement coil from Siemens, engineered for installation in heavy-duty NEMA motor starters and Class 40, 43, and 85 magnetic contactors. Designed for -pole configurations operating at a control circuit voltage of 120, this industrial coil provides the reliable electromagnetic force required to actuate contactor armatures and maintain positive power contact holding action. Electrically, the 75D70550F is precision-wound for 110/120V AC 60Hz control circuits, generating a balanced magnetomotive force that ensures crisp, rapid armature pull-in while minimizing electrical noise and AC hum. Encapsulated in high-dielectric epoxy insulation, it resists moisture, thermal stress, and voltage spikes, preventing coil breakdown and winding short-circuits during high-frequency motor cycling and continuous-duty hold-in operations. Mechanically, the 75D70550F features a drop-in replacement footprint designed for straightforward field maintenance inside Siemens NEMA Size 3 and Size 4 starter and contactor housings. Constructed with accessible screw-clamp terminal connections, it fits securely within the magnet frame assembly, maintaining exact armature alignment and reducing mechanical wear for an extended operational lifespan. Purchase the 75D70550F at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted replacement coils, magnetic contactors, and motor control accessories from top manufacturers like Siemens, Eaton, Cutler-Hammer, and Schneider Electric, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.