Allen Bradley 100-D300ED11 MCS-D 300A Contactor Unit

Feature & Principle

The contactor controls the on-off of three-phase main circuit by electromagnetic coil suction. It is used for frequent switching of large power motors, pumps and fans. Auxiliary contacts provide status feedback and interlock signals for PLC and control loop.

Specifications

Model: 100-D300ED11 Brand: Allen‑Bradley (Rockwell) Rated main current: 300A, 3 pole Coil voltage: 110~130V 50/60Hz / DC Auxiliary contact: 1NO + 1NC Status: Discontinued, replacement 100-E305KD11 Mounting: Panel mounting Certification: IEC, UL, CE

Components & Diagnostics

Electromagnetic coil, main silver contact assembly, iron core, arc extinguishing cover, auxiliary contact block, wiring terminals. Common faults: coil burnout, main contact ablation, poor auxiliary contact, stuck mechanism, arc chamber carbon accumulation.

Product Brief

100-D300ED11 heavy-duty contactor, Rockwell motor control spare widely used for old MCC cabinet, large fan and pump control circuit maintenance.