Allen-Bradley 100-D300EA11 IEC Contactor

The Allen-Bradley 100-D300EA11 is a Bulletin 100-D series IEC contactor designed for motor control and power switching applications. This 3-pole contactor is rated for 300 amperes and forms part of the MCS Motor Control System D series product line. The contactor provides reliable switching of three-phase AC motors, lighting loads, heating elements, and other industrial power circuits in accordance with IEC 60947-4-1 standards.

Electrical Ratings

Operational current rating: 300 amperes AC-3 duty rating suitable for starting and running squirrel-cage motors with normal starting torque. AC-1 duty rating for non-inductive or slightly inductive loads is higher than the AC-3 rating. Number of poles: 3-pole configuration for three-phase power circuits. Utilization category A for applications not requiring short-circuit making capacity ratings above standard levels.

Coil Specifications

The contactor is equipped with a dual-voltage AC operating coil accepting 110-130 V AC at 50 Hz or 60 Hz, and 208-277 V AC at 50 Hz or 60 Hz. The broad coil voltage range accommodates different control system voltages without requiring different contactor variants. Standard electronic coil provides consistent pickup and dropout performance across the voltage range. Coil consumption is optimized for energy efficiency during continuous operation.

Mechanical Construction

Bulletin 100-D contactors feature a space-saving design in a standard IEC contactor footprint suitable for panel mounting and motor control center installations. The 100-D series is designed for 3-phase motor switching with AC3 ratings up to 300 amperes. The contactor incorporates built-in surge suppression for coil circuit protection and reduced electromagnetic interference. Mechanical interlocking provisions allow two contactors to be mechanically interlocked for reversing or bypass applications.

Protection and Safety Features

Overload protection is provided by companion Bulletin 193-D or 592 Series overload relays that mount directly to the contactor output terminals. The thermal overload relays provide adjustable trip settings and phase loss protection. The contactor body is constructed from high-dielectric materials for electrical isolation. Finger-safe terminal shields are available as optional accessories to prevent accidental contact with energized terminals.

Accessories and Add-Ons

A full range of accessories is available including auxiliary contact blocks that mount to the front of the contactor, adding normally open and normally closed contacts for status monitoring and interlocking circuits. Surge suppressors and coil transient protection modules are available for specific applications requiring enhanced noise immunity. Terminal shrouds and marking tags support identification and safety compliance in control panels.

Applications

Typical applications for the 100-D300 contactor include motor starting for large pumps, fans, compressors, and conveyor drives. The contactor can also be used for heating element switching in industrial furnaces, capacitor bank switching for power factor correction, and general load switching in automation systems. The Bulletin 100-G contactor family provides an expansion through 1200 A AC-3 and 1350 A AC-1 for larger power applications.

Standards and Compliance

The contactor complies with IEC 60947-1 and IEC 60947-4-1 standards for low-voltage switchgear and controlgear. EN 60947-4-1 compliance for European market acceptance. CE marking indicates conformity with Low Voltage Directive and EMC Directive requirements. UL listed and CSA certified for North American installations per applicable standards. CCC certification for Chinese market compliance.

Environmental Specifications

Operating temperature range is appropriate for industrial control panel environments. The contactor meets pollution degree 3 requirements for industrial atmospheres. The insulation system is rated for 690 V AC operational voltage consistent with the frame class. The 100-D series contactors are designed for long mechanical life with thousands of operations under normal switching conditions.

Selection Notes

Model number 100-D300EA11 indicates an IEC 100-D series contactor with 300 ampere rating, EA designating specific coil and terminal configuration, and 11 suffix indicating auxiliary contact configuration. For applications with different coil voltages, alternative suffix codes are available. Contactors are typically paired with matching overload relays for complete motor starter assemblies.