Eaton C10EN3AB NEMA Size 3 Contactor — 90A, 3-Pole, 110/120V Coil, Series B1
Eaton C10EN3AB NEMA Size 3 Contactor — 90A, 3-Pole, 110/120V Coil, Series B1
Product images are representative only. Actual product may vary.
The Eaton C10EN3AB (also known as the Cutler-Hammer C10EN3AB) is a NEMA Size 3, 3-pole definite purpose contactor rated at 90 Amps with a 110/120VAC coil at 50/60 Hz. Designed for motor control applications requiring a reliable, non-reversing switching device, this contactor is part of Eaton's trusted C10 series and carries Series B1 designation.
The C10EN3AB is engineered to meet or exceed NEMA ICS 2 standards and is used widely in commercial and industrial motor control panels, compressor controls, and HVAC equipment. Its compact open-frame construction and standardized NEMA Size 3 footprint make it a direct drop-in replacement for many legacy C10EN3 applications.
Key Specifications
- Part Number: C10EN3AB (also listed as C10EN3)
- Manufacturer: Eaton / Cutler-Hammer
- Series: C10 Definite Purpose Contactor, Series B1
- NEMA Size: Size 3
- Number of Poles: 3-Pole
- Current Rating: 90 Amps
- Coil Voltage: 110V AC @ 50Hz / 120V AC @ 60Hz
- Contactor Type: Definite Purpose, Non-Reversing
- Standards: NEMA ICS 2, UL Listed
What Does NEMA Size 3 Mean?
NEMA Size 3 defines a specific class of contactor rating under the NEMA ICS 2 standard. A NEMA Size 3 contactor is rated for continuous operation at up to 90 amps and can control three-phase motors up to approximately 50 HP at 460V or 30 HP at 230V. This sizing ensures the C10EN3AB delivers adequate capacity and safety margins for typical industrial motor applications.
Common Applications
- Three-phase motor control in industrial environments
- Commercial HVAC and air conditioning systems
- Compressor and pump motor switching
- Motor control centers (MCCs) and control panels
- Replacement for legacy Cutler-Hammer C10EN3 contactors
Why Choose the Eaton C10EN3AB?
The C10EN3AB combines the proven reliability of Eaton's definite purpose contactor platform with a NEMA Size 3 rating, making it the right choice for demanding continuous-duty motor control applications. The Series B1 designation reflects Eaton's incremental improvements in contact life and coil performance over the original C10 design — offering better durability and longer maintenance intervals in high-cycle applications.