Overview
The Cutler Hammer ECN0501AAA is a non-combination, non-reversing motor starter from Eaton’s Freedom Series, rated for 18 amps at NEMA Size 0. It combines a 3-pole, 3-phase magnetic starter with a NEMA Type 1 indoor enclosure, making it a complete control solution for industrial motor applications. The 120V AC coil (50/60 Hz) design suits standard control circuits, while the thermal overload relay provides reliable motor protection.
Key Features
- 18-amp, 3-phase non-reversing magnetic starter
- NEMA Size 0 designation with NEMA Type 1 indoor enclosure
- Freedom Series design: compact, impact-resistant, and temperature-rated
- Standard interchangeable heater overload relay (thermal OLR)
- 120V AC / 60 Hz (110V AC / 50 Hz) magnet coil voltage
- Reset button cover control for field operation
Technical Specifications
- Manufacturer: Eaton Cutler Hammer
- Part Number: ECN0501AAA
- Product Series: Freedom Series
- Starter Type: Non-Combination, Non-Reversing
- Current Rating: 18 Amps
- Poles: 3-Pole
- Phase: 3-Phase
- Coil Voltage: 120V AC 60 Hz / 110V AC 50 Hz
- NEMA Rating: NEMA Size 0, NEMA Type 1 (Indoor)
- Enclosure Type: General Purpose, Fully Enclosed
- Overload Protection: Thermal Overload Relay (Standard Heater)
- Weight: 9.0 lbs
- Control Type: Manual with Reset Button
Typical Applications
The ECN0501AAA is suited for fixed-speed, 3-phase motors in:
- Pump and fan motor control systems
- Small to mid-sized compressor starter circuits
- Machine tool and industrial equipment motor control
- HVAC and circulation systems requiring enclosed, reliable starting
- Agricultural and facilities motor automation
Compatibility & Replacements
Compatible With
- 3-phase motors rated 208V to 660V
- Standard industrial control voltage circuits (120V AC coil supply)
- Fixed-speed motor applications without reversing requirement
- Thermal overload relay heater elements (standard interchange type)
- Direct connection to motor branch circuit breaker and disconnect switch
Replaces / Drop-In Replacement For
- Eaton Cutler Hammer ECN0501BAA (240V coil variant)
- Other NEMA Size 0 non-reversing Freedom starters with 18A rating
- Legacy general-purpose Size 0 magnetic starters with identical mounting
Works With
- Manual control circuits (push-button or selector switch station)
- Thermal overload relay heater elements (100–200 series standard types)
- Magnetic control relays and pilot devices rated for 120V AC coil input
- Industrial motor soft-start and VFD bypass configurations
- Standard NEMA enclosure wiring and terminal layouts
