Eaton C25DNF340A Contactor

The Eaton C25DNF340A is a commercial-grade 3-pole definite purpose contactor engineered for rigorous HVACR and industrial motor control applications. This 40-amp contactor features a 110/120V AC coil (50/60 Hz) and is designed with an open-frame construction for maximum heat dissipation. Built to handle an inductive load of 40A and a resistive load of 50A, it serves as a direct technical cross-reference for the 42CF35AF. The unit utilizes box lugs with posidrive setscrews and dual quick-connect terminals, providing secure terminations for high-vibration environments. Its metal mounting plate ensures a rigid installation on panels or internal chassis, maintaining alignment even under heavy cycling. Whether you are servicing a heavy-duty compressor, a centrifugal pump, or a large-scale resistive heating bank, this Eaton C25DNF340A 3-pole 40A contactor provides the high-amperage switching reliability required in modern electrical control circuits.

Key Benefits for Technicians:

• Dual Terminal Versatility: Equipped with both box lugs and quick-connect terminals to accommodate various wiring field conditions.
• High-Current Durability: Rated for a 50A resistive load, making it ideal for oversized heating elements and industrial loads.
• Compact D-Frame Design: Standardized footprint allows for easy replacement of older 3-pole contactors without extensive panel modification.
• Proven Reliability: UL Recognized and CSA Certified component designed for thousands of cycles in high-demand HVAC systems.

Common Questions:

Does this contactor support 24V control circuits?
No, this model is specifically wound for a 110/120V AC coil. Attempting to use a 24V control signal will not engage the contacts.

Can I use the C25DNF340A to replace a 30A contactor?
Yes, as long as the coil voltage and pole count match, stepping up to a 40A inductive rating provides a higher safety margin and can extend the service life of the contacts.

Are the auxiliary contacts included?
This is an open-type 3-pole base unit. While it accepts snap-on auxiliary blocks, any additional signal contacts must be sourced separately.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.