Overview
The Allen-Bradley 104-B180ND3 is a Bulletin 104-B IEC/NEMA reversing contactor engineered for 3-phase motor control applications requiring directional switching. Rated at 180A continuous, this contactor delivers reliable forward-reverse motor control in industrial machinery, pumps, fans, and process equipment. The reversing configuration integrates two interlocked contactors to safely reverse motor rotation while preventing phase loss or accidental simultaneous closure.
Key Features
- 180A continuous current rating suitable for large motor control
- 3-pole, 3-phase design for full 3-phase motor reversing duty
- Terminal pads with bolt-and-nut connections for secure bus bar or crimp connector attachment
- 1 normally open (N.O.) auxiliary contact for control signaling and interlocks
- 110-120V AC 50/60Hz control coil standard configuration
- Built-in surge suppression on electronic coils for enhanced reliability
- IEC and NEMA standards compliance—CSA and UL Listed
Technical Specifications
- Catalog Number: 104-B180ND3
- Contactor Type: Reversing (Bulletin 104-B)
- Poles/Phases: 3-Pole, 3-Phase
- Current Rating: 180A continuous
- Main Voltage Rating: 600V nominal
- Coil Voltage/Frequency: 110-120V AC, 50/60Hz
- Auxiliary Contacts: 1 N.O. contact
- Power Terminals: Pad type with bolt and nut
- Standards: UL Listed, CSA Certified, IEC 60947-4-1
Typical Applications
- Reversible 3-phase motor starting and direction control
- Pump and compressor forward-reverse control
- Conveyor belt direction control systems
- Hoist and crane load raising/lowering operations
- Industrial fan and ventilation reversing duty
- Compatibility with Bulletin 100/104 motor starter assemblies and overload relay packages
Compatibility & Replacements
The 104-B180ND3 is part of Allen-Bradley’s Bulletin 104-B reversing contactor family and is compatible with standard Bulletin 193 Overload Relays and Bulletin 140M Motor Protection Circuit Breakers for complete motor control solutions. For non-reversing 180A applications, the 100-B180ND3 (Bulletin 100-B) is the direct non-reversing equivalent. Verify control coil voltage and terminal type requirements when specifying replacement or substitute models. Always consult current Allen-Bradley selection guides for system integration and coordination requirements.
