The Eaton CN55NN3A is a NEMA reversing contactor (3-pole, full-voltage) rated for 135 A in an open NEMA Size 4 enclosure. With coil options for 120 VAC (60 Hz) or 110 VAC (50 Hz), it’s built for industrial motor control and reversing starter duties — suitable for NEMA contactor installations, motor starters, conveyors, pumps, compressors and HVAC motor applications.

Key Features

Full-voltage reversing contactor design for reliable direction change of three-phase motors.
Heavy-duty 135 A current rating for robust motor switching.
Coil voltage options: 120 VAC (60 Hz) or 110 VAC (50 Hz) for regional compatibility.
Designed for NEMA Size 4 open mounting; straight-through wiring with top line / bottom load arrangement.
Supports high motor HP: 40 HP @ 208 VAC, 50 HP @ 240 VAC and 100 HP @ 600 VAC.
Accessible screw-type power terminals with captive, self-lifting pressure plates; optional fingerproof shields and snap-on accessories.

Technical Specifications

Manufacturer	Eaton
Commercial Reference	CN55NN3A
Component	NEMA Contactor
Sub Component	NEMA Reversing Contactor
NEMA Size	4 (open enclosure)
Poles	3
Rated Current	135 A
Coil Voltage / Frequency	120 VAC (60 Hz) or 110 VAC (50 Hz)
Reversing Capability	Full-voltage reversing
Motor HP Ratings	40 HP @ 208 VAC; 50 HP @ 240 VAC; 100 HP @ 600 VAC

Applications

Use CN55NN3A for reversing three-phase motors in conveyor drives, pump and compressor control, hoists and winches, HVAC fans and blowers, and motor control center (MCC) buckets where reliable direction change and high-current switching are required.

We supply genuine Eaton contactors through authorized channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. Competitive pricing and local support available — contact us to request a formal quotation and lead time.

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